4500-WATT
PORTABLE GENERATOR
Instruction Manual
MODEL GN4500
IMPORTANT: Your new tool has been engineered and manufactured to WEN’s highest standards for dependability,
ease of operation, and operator safety. When properly cared for, this product will supply you years of rugged,
trouble-free performance. Pay close attention to the rules for safe operation, warnings, and cautions. If you use
your tool properly and for its intended purpose, you will enjoy years of safe, reliable service.
NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel free to contact us:
TECHSUPPOR[email protected]1-800-232-1195 (M-F 8AM-5PM CST)
For replacement parts and the most up-to-date instruction manuals, visit WENPRODUCTS.COM
EPA III CERTIFIED CARB COMPLIANT
2
CONTENTS
WELCOME 3
Specifications ................................................................................................... 3
Introduction ..................................................................................................... 4
SAFETY 5
Safety Information ........................................................................................... 5
Generator Safety Warnings .............................................................................. 6
BEFORE OPERATING 8
Unpacking & Packing List ................................................................................ 8
Know Your Generator ....................................................................................... 9
Generator Preparation .................................................................................... 11
OPERATION & MAINTENANCE 14
Starting Your Generator ................................................................................. 14
Using Your Generator ..................................................................................... 16
Shutting Off Your Generator ........................................................................... 19
Maintenance ................................................................................................... 20
Transportation & Storage ............................................................................... 25
Troubleshooting Guide ................................................................................... 26
Wiring Diagram .............................................................................................. 27
Exploded View & Parts List ............................................................................ 28
Warranty Statement ....................................................................................... 33
To purchase accessories for your tool, visit WENPRODUCTS.COM
Wheel & Handle Kit (Model No. GNA410), Magnetic Oil Dipstick (Model No. 55201),
and Generator Cover (Model No. 56406).
CONTENTSSPECIFICATIONS
3
Model Number GN4500
Surge (Starting) Wattage 4500 Watts
Rated (Running) Wattage 3600 Watts
Rated Voltage 120V AC
Rated Amperage 30A
Phase Single
Frequency 60Hz
Product Weight 97.9 lbs (without wheel kit), 104.5 lbs (with wheel kit)
Product Dimensions 23-1/4 in. × 18 in. × 18-3/4 in.
GENERATOR
Engine Type
4 stroke, OHV, single cylinder with forced air cooling
system
Engine Displacement 212cc
Fuel Tank Capacity 4 US gallons (15 L), 87 octane minimum
Oil Capacity 20.3 fl. oz. (0.6 L)
Half-Load Run Time 13 hours
Lubrication System Splash
Spark Plug Type NGK BP7ES/Torch F7TC
Spark Plug Gap 0.7 - 0.8 mm (0.028 - 0.031 in.)
Spark Plug Torque
½ - ¾ turn after gasket contacts base
or 15 ft-lbs (20.34 Nm)
ENGINE
Rated output determined by PGMA Standard G300
4
INTRODUCTION
Thanks for purchasing the WEN 4500-Watt Portable Generator. Refer to the illustration below for the location of
the serial number on the side of the engine. Record the generator information in the spaces provided below. If as-
sistance for information or service is required, please contact customer service by calling 1-800-232-1195, M-F
8-5 CST; you will be asked to provide the following generator information when calling.
Generator Model Number: GN4500
Date of Purchase: ______________________________________________
Purchased From: _______________________________________________
Serial Number: ________________________________________________
TO MAXIMIZE THE LIFESPAN OF YOUR GENERATOR: We recommend running your generator at least once a
month for 20 to 30 minutes. Start the generator according to the instructions and plug a small load in to make
sure the outlet is producing electricity.
SERVICE RECORD
Record the service dates of your generator in the chart below. Please perform maintenance checks and operations
according to this manual. Refer to "Maintenance" on page 20.
Service Record Date Date Date Date Date Date
Change Oil
Change Spark Plug
Clean Fuel Tank
Clean Air Cleaner
Clean Spark Arrestor
Serial
Number
5
SAFETY INFORMATION
WARNING: Before operating the generator, make sure to read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result in electric shock, fire or serious injury.
SAFETY INTRODUCTION
Safety is a combination of common sense, staying alert, and knowing how your tool works. This manual contains
important information regarding the generator’s potential safety concerns, as well as preparation, operation, and
maintenance instructions. Before operating this generator, be sure to read and observe all warnings and instructions
both on the generator labels and in this instruction manual. Failure to follow all instructions listed below may result
in personal injury.
NOTE: The following safety information is not meant to cover all possible conditions and situations that may occur.
WEN reserves the right to change this product and specifications at any time without prior notice.
At WEN, we are continuously improving our products. If you find that your tool does not exactly match this manual,
please visit wenproducts.com for the most up-to-date manual or contact customer service at 1-800-232-1195,
M-F 8-5 CST.
Keep this manual available to all users during the entire life of the tool and review it frequently to maximize
safety for both yourself and others.
SAVE THESE SAFETY INSTRUCTIONS.
SAFETY SYMBOLS
The purpose of following safety symbols is to attract your attention to possible dangers. The safety symbols, and
their explanations, deserve your careful attention and understanding. The safety warnings do not by themselves
eliminate any danger. The instructions or warnings they give are not substitutes for proper accident prevention
measures.
NOTICE REGARDING EMISSIONS
Engines that are certified to comply with U.S. EPA emission regulations for SORE (Small Off Road Equipment), are
certified to operate on regular unleaded gasoline, and may include the following emission control systems: (EM)
Engine Modifications and (TWC) Three-Way Catalyst (if so equipped).
QUESTIONS? PROBLEMS?
In order to answer questions and solve problems in the most efficient and speedy manner, contact customer
service at 1-800-232-1195, M-F 8-5 CST or email [email protected].
DANGER: indicates a hazard, which, if not avoided, will result in death or serious injury.
WARNING: indicates a hazard, which, if not avoided, could result in death or serious injury.
CAUTION: indicates a hazard, which, if not avoided, might result in minor or moderate injury.
CAUTION: when used without the alert symbol, indicates a situation that could result in damage to the machine.
6
GENERATOR SAFETY WARNINGS
DANGER: CARBON MONOXIDE
Using a generator indoors CAN KILL YOU IN MINUTES. Generator exhaust contains carbon monoxide (CO).
This is a poison gas you cannot see or smell. If you can smell the generator exhaust, you are breathing CO. But
even if you cannot smell the exhaust, you could be breathing CO.
NEVER use a generator inside homes, garages, crawl spaces, or other partially enclosed areas. Deadly levels
of carbon monoxide can build up in these areas. Using a fan or opening windows and doors does NOT supply
enough fresh air. ONLY use a generator outside and far away from windows, doors, and vents. These openings
can pull in generator exhaust.
Even if you use a generator correctly, CO may leak into the home. ALWAYS use a battery-powered or battery-
backup CO alarm in the home. If you start to feel sick, dizzy, or weak after the generator has been running, move
to fresh air RIGHT AWAY. See a doctor. You may have carbon monoxide poisoning.
WARNING: RISK OF EXPLOSION. HIGHLY FLAMMABLE: This generator may emit highly flammable and
explosive gasoline vapors, which can cause severe burns or even death, if ignited. A nearby open flame can lead
to explosion even if not directly in contact with gasoline.
• Do not operate near open flame, heat, or any other ignition source. Do not smoke near the generator.
• Always operate on a firm, level surface.
• Always turn generator off before refueling. Allow generator to cool for at least 2 minutes before removing
fuel cap. Loosen cap slowly to relieve pressure in tank.
• Do not overfill fuel tank. Gasoline may expand during operation. Do not fill to the top of the tank. Allow for
expansion. Always check for spilled fuel before operating.
• If fuel spills, move the generator at least 30 feet away from the spill and wipe clean any spilled fuel before
starting the engine.
• Empty fuel tank before storing or transporting the generator.
WARNING: If this generator is used as a supply for a building’s wiring system, the generator must be
installed by a qualified electrician and connected to a transfer switch as a separately derived system in accor-
dance with all applicable laws and electrical codes and the National Electrical Code, NFPA 70. The generator
shall be connected to a transfer switch that switches all conductors excluding the equipment grounding con-
ductor. The frame of the generator shall be connected to an approved grounding electrode.
CALIFORNIA PROPOSITION 65 WARNING: This product contains chemicals and produces exhaust known
to the State of California to cause cancer, birth defects and other reproductive harm.
7
GENERATOR SAFETY WARNINGS
OPERATING ENVIRONMENT
1. Using a generator indoors can kill you in minutes.
Only use a generator outside and far away from win-
dows, doors and vents.
2. Do not smoke near the generator.
3. Do not operate near open flame, heat, or flam-
mable materials. This generator may emit highly flam-
mable and explosive gasoline vapors, which can cause
severe burns or even death if ignited. A nearby open
flame can lead to an explosion even if it isn’t directly in
contact with gasoline.
4. Do not expose the generator to rainy or wet con-
ditions; doing so significantly increases the risk of
electrical shock. Never handle the generator, electronic
devices, or any cord while standing in water, while bare-
foot, or when hands or feet are wet.
5. Always operate the generator on a dry, firm, level
surface.
6. The generator should have at least 5 feet of clear-
ance from buildings or other equipment during opera-
tion.
7. Do not allow children or non-qualified persons to
operate the generator.
GENERATOR PREPARATION
1. Always ground the generator before using it to max-
imize safety (see “Ground the Generator” section).
2. Do not overfill fuel tank, as gasoline may expand
during operation. Do not fill to the very top of the tank.
Leave room for gasoline expansion. Always check for
spilled fuel before operating.
3. If any part of the generator, electrical device or
power cord is broken, damaged, or defective, make
sure it is repaired or replaced before operation. Ser-
vice should only be performed by a qualified technician.
Do not use receptacles or cords that show signs of
damage, such as broken or cracked insulation.
4. Use a ground fault circuit interrupter (GFCI) in high-
ly conductive areas such as metal decking or steel
work. Extension cords with in-line GFCIs are recom-
mended for these operations to maximize safety.
5. If connecting the generator to a building’s electrical
system for standby power, you MUST consult a quali-
fied electrician and install a transfer switch. Such
connections must comply with local electrical laws and
codes. Failure to comply can create a back-feed, which
may result in serious injury or death to utility workers.
6. Never modify the generator in any way. Modifying
or using the machine for any other purpose for which it
is not designed may result in serious injuries, machine
damage and voiding of the warranty.
GENERATOR OPERATION
1. Only use the generator for its intended purposes.
Modifying or using the generator for operations for
which it was not designed may cause hazards and per-
sonal injury.
2. Do not touch bare wires or receptacles (outlets).
3. Do not exceed the wattage capacity of the generator
by plugging in more electrical devices than the unit
can handle. This could damage the generator and/or
connected electrical devices. Check the operating volt-
age and frequency requirements of all electrical devices
prior to plugging them into the generator.
Generator safety warnings continue on the next page.
WARNING! Do not let comfort or familiarity with the product replace strict adherence to product safety
rules. Failure to follow the safety instructions may result in serious personal injury.
8
GENERATOR SAFETY WARNINGS
WARNING! Do not let comfort or familiarity with the product replace strict adherence to product safety
rules. Failure to follow the safety instructions may result in serious personal injury.
4. Allow generator to run for several minutes before
connecting electrical devices. Do not start or stop
engine with electrical devices plugged in to the recep-
tacles. Failure to do so could damage the generator and/
or connected electrical devices.
5. Do not turn on electrical devices until after they are
connected to the generator.
6. Generators vibrate in normal use. During and after
the use of the generator, inspect both the generator as
well as extension and power supply cords for damage
resulting from vibration.
7. Do not touch hot parts. This generator produces heat
when running. Temperatures near exhaust can exceed
150ºF (65ºC). Allow generator to cool down after use
before touching engine or areas of the generator that
become hot during use.
8. Turn off all connected electrical devices before
stopping the generator.
9. Always turn generator off before refueling. Allow
generator to cool for at least 2 minutes before removing
fuel cap. Loosen cap slowly to relieve pressure in tank.
10. Turn the engine switch to “OFF” position when the
engine is not running.
11. Empty fuel tank before storing or transporting the
generator. Do not store generator or gasoline near fur-
naces, water heaters, or any other appliances that pro-
duce heat or have automatic ignitions. Store the genera-
tor and fuel away from sparks, open flames, pilot lights,
heat and other sources of ignition.
12. Always wash hands after handling generator.
CAUTION: Misuse of this generator can damage it or
shorten its lifespan.
TO MAXIMIZE THE LIFESPAN OF YOUR GENERATOR: We recommend running your generator at least once a
month for 20 to 30 minutes. Start the generator according to the instructions and plug a small load in to make
sure the outlet is producing electricity. If you do not run it often, it will greatly shorten the generator’s lifespan
and void the warranty.
UNPACKING
With the help of a friend or trustworthy foe, carefully remove the generator from the packaging and place it on a
sturdy, flat surface. Make sure to take out all contents and accessories. Do not discard the packaging until every-
thing is removed. Check the packing list below to make sure you have all of the parts and accessories. If any part
is missing or broken, please contact customer service at 1-800-232-1195 (M-F 8-5 CST), or email techsupport@
wenproducts.com. See included insert for instructions on removing the shipping brackets.
PACKING LIST
UNPACKING & PACKING LIST
TIP: A Wheel & Handle Kit (Model No. GNA410) is
available for purchase from wenproducts.com. This kit
allows for easier transportation of your generator.
A. Generator ..................................................1
B. Spark Plug Wrench ...................................1
C. Engine Oil Bottle .......................................1
9
KNOW YOUR GENERATOR
KNOW YOUR GENERATOR
Refer to the following diagrams to become familiarized with all the parts and controls of your generator. The
components will be referred to later in the manual for assembly and operation instructions.
GENERATOR
Fuel Cap
Fuel Gauge
Fuel Valve
Choke Lever
Air Filter
Control
Panel
Oil Fill &
Dipstick
ON/OFF
Switch
Recoil
Starter
• Fuel Gauge
Indicates amount of fuel inside the fuel tank.
E indicates empty, F indicates full.
• Choke Lever
Adjusts the amount of air allowed into the engine
during startup.
• Fuel Valve
Allows fuel to enter the engine from the fuel tank.
• Air Filter
A case with a sponge-like element that filters the
air entering the engine.
• Recoil Starter
Pull the cord to start the engine.
• Fuel Cap
Access to the fuel tank to add gasoline.
• Control Panel
Refer to the next page for more information.
• ON/OFF SWITCH
Use to turn the engine ON and OFF.
• Oil Fill and Dipstick
Access to the oil tank to check oil levels and add
oil.
NOTE: You can purchase a wheel kit separately for
easier transportation. Visit wenproducts.com and
search Model No. GNA410.
1110
KNOW YOUR GENERATOR
CONTROL PANEL
MAIN
BREAKER
GROUNDING
NUT
ON
OFF
transfer
switch ready
AC 120V 30A
L5-30R
AC 120V 30A
TT-30R
Rv ready
IMPORTANT BEFORE STARTING
1. Make sure the generator is properly grounded.
2. Check that the crankcase is sufficiently filled with oil.
3. Turn off and unplug all devices connected to generator.
OPERATION SUMMARY
1. Move the switch to the ON position.
2. Turn the fuel valve to the ON position.
3. Move the choke lever to the START position.
4. Pull the start cord to start the engine.
5. If the engine fails to start, adjust the choke and try again.
6. Allow the generator to run for several minutes before
connecting devices.
ENGINE
SWITCH
ON
OFF
BREAKER
BREAKER
ON OFF
AC 120V 20A
5-20R
AC 120V 20A
5-20R
ON OFF
1
86 7
5
4 4
2 5 3
1. Engine ON/OFF Switch
Use to turn the engine ON and OFF.
2. Data Meter
Displays voltage, frequency, total runtime
(HHHH) and session runtime (HH:MM). Press
the MODE button to switch between displays.
3. AC Main Breaker
Push the button to reset the circuit.
4. AC 120V NEMA 5-20R Duplex Receptacles (20A)
Standard household outlets provide 120V 60Hz
power.
5. AC Circuit Breaker
Push the button to reset the circuit.
6. AC 120V NEMA TT-30R Receptacle (30A)
RV ready outlet provides 120V 60Hz power.
7. AC 120V NEMA L5-30R Receptacle (30A)
Transfer switch ready outlet provides 120V
60Hz power.
8. Grounding Nut
Ground the generator to reduce the risk of
electric shock. Refer to "Step 3 - Ground The
Generator" on page 13.
1110
GENERATOR PREPARATION
The following section describes the necessary steps to prepare the generator for use. If you are unsure about how
to perform any of the steps please call 1-800-232-1195 (M-F 8-5 CST) for customer service. Failure to perform
these steps properly can damage the generator or shorten its life.
STEP 1 - ADD/CHECK OIL
The user must add the proper amount of oil before operating the generator for the first time. The oil capacity of the
engine crankcase is 20.3 fl. oz. (0.6 L).
Fig. 1
• 30W Engine Oil
Temperatures above 40°F.
• 10W-30 Engine Oil
Temperatures between 0°F - 40°F.
• Synthetic 5W-30 Engine Oil
All temperature ranges.
ENGINE OIL RECOMMENDATIONS - Select good quality detergent oil bearing the American Petro-
leum Institute (API) service classifications SJ, SL, or SM (synthetic oils may be used). Select the
SAE viscosity grade of oil that matches the expected operating temperature. For general use (above 40° F), we
recommend using 30W engine oil.
Fig. 2
Fig. 3
Lower Fill Line
Upper Fill Line
CAUTION! Keep the generator level. Tilting the genera-
tor to assist in filling will cause oil to flow into the wrong
areas of the engine and cause damage.
TO ADD OIL:
1. Place the generator on a level surface. Make sure the
engine is OFF before adding or checking oil.
2. Unscrew the oil dipstick (Fig. 2) from the engine.
3. Using an oil funnel or appropriate dispenser, slowly add
oil into the oil fill, being careful not to overfill the unit. Fill
the crankcase to the upper fill line so you can visually see
the oil coming halfway up the oil fill threads. See Fig. 3.
4. Reinstall the oil dipstick and firmly tighten it. Wipe clean
any spilled oil.
CAUTION! For subsequent operation, the oil level should
be checked before each use, or after every 8 hours of op-
eration. The generator is equipped with a low-oil sensor
and will not start without a sufficient amount of oil. Follow
the instructions on the next page to check the oil level.
Dipstick
Dipstick
GENERATOR PREPARATION
Lower Limit
Upper Limit
TO CHECK OIL LEVEL (before every subsequent start):
1. Place the generator on a level surface. Make sure the
engine is OFF before adding or checking oil.
2. Remove and wipe the dipstick with a clean rag.
3. Insert the dipstick into the oil fill without screwing it in.
Remove the dipstick to check the oil mark.
4. If the oil mark covers less than one half of the dipstick,
slowly add oil until the oil mark reaches the top of the dip-
stick (or when you can see the oil coming halfway up the
oil fill threads). See Fig. 4.
OIL LEVEL SHUTDOWN
To protect the unit from damage, the generator is equipped
with a low-oil-pressure shutoff that will automatically shut
down the engine when the oil level is too low. The oil level
of the engine should be checked before each start to ensure
that the engine crankcase contains sufficient lubricant.
STEP 2 - ADD/CHECK FUEL
TIP: Your WEN generator is compatible with the
WEN 55201 Magnetic Oil Dipstick (not included),
available for purchase at wenproducts.com. The
dipstick’s industrial-strength magnetic tip will
collect metal shavings from your generator’s oil
tank to help preserve the engine and extend your
generator’s lifespan.
WARNING: RISK OF EXPLOSION. HIGHLY FLAMMABLE: This generator may emit highly flammable and
explosive gasoline vapors, which can cause severe burns or even death, if ignited. A nearby open flame can lead
to explosion even if not directly in contact with gasoline.
• Do not operate near open flame, heat, or any other ignition source. Do not smoke near the generator.
• Always operate on a firm, level surface.
• Always turn generator off before refueling. Allow generator to cool for at least 2 minutes before removing
fuel cap. Loosen cap slowly to relieve pressure in tank.
• Do not overfill fuel tank. Gasoline may expand during operation. Do not fill to the top of the tank. Allow for
expansion. Always check for spilled fuel before operating.
• If fuel spills, move the generator at least 30 feet away from the spill and wipe clean any spilled fuel before
starting the engine.
• Empty fuel tank before storing or transporting the generator.
ONLY use fresh (within 30 days from purchase), lead-free
gasoline with a minimum of 87 octane rating. The genera-
tor performs best with ethanol-free gasoline. DO NOT use
gasoline with over 10% ethanol.
The capacity of the fuel tank is 4 gallons. Do not mix oil
with gasoline.
Follow the instructions on the next page to add gasoline.
IMPORTANT:
• Avoid getting dirt or water into the fuel tank.
• Keep gasoline away from sparks, open flames,
pilot lights, heat, and other sources of ignition.
• Gasoline can age in the tank and make starting
difficult. Never store the generator for more
than 2 months with fuel in the tank.
• Never use an oil/gasoline mixture.
• Never use old gasoline.
Fig. 4
Grounding Nut
Control Panel
Fig. 6
13
GENERATOR PREPARATION
TO ADD GASOLINE:
1. Place the generator on a level surface. Make sure the
engine is OFF before adding or checking the fuel.
2. Unscrew the fuel cap (Fig. 5) and set it aside. The fuel
cap may be tight and hard to unscrew.
3. Slowly add unleaded gasoline to the fuel tank. Be careful
not to overfill. Reinstall fuel cap and wipe clean any spilled
gasoline with a dry cloth.
NOTE: Do not fill the fuel tank to the very top. If you do
so, gasoline will expand and spill during use, even with
the fuel cap in place.
TO CHECK GAS LEVEL (before every subsequent start):
1. Before starting the generator, check the fuel gauge (Fig.
5) to see if there is sufficient fuel inside the tank:
• E = Empty
• F = Full
2. If the tank is empty add gasoline to the gas tank. See
above section, "To Add Gasoline".
STEP 3 - GROUND THE GENERATOR
To reduce the risk of electric shock and to maximize safety,
the generator should be properly grounded.
1. Attach one end of the grounding wire to the grounding
nut (Fig. 6). Tighten the nut to secure the grounding wire.
2. Connect the other end of the grounding wire to a copper,
brass, or steel-grounding rod that is driven into the earth.
Fuel Cap
Fig. 5
Fuel Gauge
WARNING! Failure to properly ground the
generator increases your risk of electric shock.
NOTE: Grounding wire and grounding rods
are not included with the generator. A general-
ly acceptable grounding wire is a No. 12 AWG
(American Wire Gauge) stranded copper wire.
Grounding codes can vary by location. Contact a
local electrician to check the area codes.
MAIN
BREAKER
GROUNDING
NUT
ON
OFF
transfer
switch ready
AC 120V 30A
L5-30R
AC 120V 30A
TT-30R
Rv ready
IMPORTANT BEFORE STARTING
1. Make sure the generator is properly grounded.
2. Check that the crankcase is sufficiently filled with oil.
3. Turn off and unplug all devices connected to generator.
OPERATION SUMMARY
1. Move the switch to the ON position.
2. Turn the fuel valve to the ON position.
3. Move the choke lever to the START position.
4. Pull the start cord to start the engine.
5. If the engine fails to start, adjust the choke and try again.
6. Allow the generator to run for several minutes before
connecting devices.
ENGINE
SWITCH
ON
OFF
BREAKER
BREAKER
ON OFF
AC 120V 20A
5-20R
AC 120V 20A
5-20R
ON OFF
1514
CAUTION!
Disconnect all electrical loads from the generator before attempting to start.
Before starting the generator, make sure you have read and performed the steps in the “Generator Preparation”
section of this manual, pages 11-13. If you are unsure about how to perform any of the steps in this manual please
call 1-800-232-1195 (M-F 8-5 CST) for customer service.
To maximize safety, ALWAYS ground the generator before using it. Refer to "Step 3 - Ground The Generator" on
page 13.
Use a ground fault circuit interrupter (GFCI) in highly conductive areas such as metal decking or steel work. GFCIs
are available in-line with some extension cords.
STARTING YOUR GENERATOR
DANGER: CARBON MONOXIDE
Using a generator indoors CAN KILL YOU IN MINUTES. Generator exhaust contains carbon monoxide (CO).
This is a poison gas you cannot see or smell. If you can smell the generator exhaust, you are breathing CO. But
even if you cannot smell the exhaust, you could be breathing CO.
NEVER use a generator inside homes, garages, crawl spaces, or other partially enclosed areas. Deadly levels
of carbon monoxide can build up in these areas. Using a fan or opening windows and doors does NOT supply
enough fresh air. ONLY use a generator outside and far away from windows, doors, and vents. These openings
can pull in generator exhaust.
Even if you use a generator correctly, CO may leak into the home. ALWAYS use a battery-powered or battery-
backup CO alarm in the home. If you start to feel sick, dizzy, or weak after the generator has been running, move
to fresh air RIGHT AWAY. See a doctor. You may have carbon monoxide poisoning.
WARNING: The exhaust from this product contains chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
WARNING: Do not operate generator near open flame or flammable materials This generator may emit
highly flammable and explosive gasoline vapors, which can cause severe burns or even death if ignited. A
nearby open flame can lead to explosion even if it isn’t directly in contact with gasoline. Do not smoke near the
generator.
WARNING: This generator produces powerful voltage, which can result in electrocution.
WARNING: Do not use in rainy or wet conditions. Do not touch bare wires or receptacles (outlets). Do not
allow children or non-qualified persons to operate.
WARNING: Generator should only be connected to electrical devices, either directly or with an extension
cord. NEVER connect to a building electrical system without a qualified electrician and connected to a transfer
switch as a separately derived system. Such connections must comply with local electrical laws and codes.
Failure to comply can create a back-feed, which may result in serious injury or death to utility workers.
Follow the instructions on the next page to start your generator.
1514
BEFORE STARTING THE GENERATOR
1. Verify that the generator is outside on a dry, level surface. Allow at least two feet of clearance on all sides of the
generator.
2. To maximize safety, check that the generator is properly grounded. Refer to "Step 3 - Ground The Generator" on
page 13.
3. Check that there is a sufficient level of oil in the crankcase. Add oil if necessary. Refer to "Step 1 - Add/Check
Oil" on page 11.
4. Check that there is a sufficient level of fuel in the fuel tank. Add gas if necessary. Refer to "Step 2 - Add/Check
Fuel" on page 12.
5. Make sure all electrical devices are unplugged from the generator during ignition. Otherwise it will be difficult
for the engine to start.
STARTING YOUR GENERATOR
CHOKE LEVER
CLOSE
START RUN
OPEN
FUEL VALVE
OFF
ON
Fig. 7
NOTE: In case you have had repeated failed attempts to start the engine, please consult the troubleshooting
guide before attempting to start the generator. If problems persist please call 1-800-232-1195, M-F 8-5 CST.
STARTING THE GENERATOR
1. Turn the fuel valve to the ON position (Fig. 7).
2. Move the choke lever to the CLOSE/START position (Fig.
7).
3. Flip the engine ON/OFF switch (page 9) to the ON
position.
4. Pull on the recoil starter handle (page 9) slowly until
a slight resistance is felt, then pull quickly to start the en-
gine. Return cord gently into the recoil starter. Never allow
the cord to snap back.
5. If engine fails to start, repeat this step.
6. Once the engine has started, slowly return the choke lever all the way to the OPEN/RUN position.
7. Allow the engine to run for several minutes before attempting to connect any electrical devices. This allows the
generator to stabilize its speed and temperature. Follow the instructions in the next section for properly connecting
your electrical devices.
1716
USING YOUR GENERATOR
CALCULATING THE WATTAGE OF YOUR DEVICE(S)
Connect electrical devices running on AC current according to their wattage requirements. Calculate the total run-
ning wattage and starting wattage of the device(s) you wish to connect, and MAKE SURE that they are within the
capacity of your generator and the capacity of each individual outlet.
Generator
Wattage
Capacity
GENERATOR RUNNING (RATED) WATTS GENERATOR STARTING (SURGE) WATTS
3600W 4500W
What this means:
The generator can produce a maximum of
3600W on a continuous basis to supply on-
going power to your electronic devices.
NOTE: Also check the rated amperage for
each outlet and make sure not to overload
the individual outlets.
What this means:
Some devices such as box fans require
short bursts of extra power in addition to
the rated wattage listed by the device to start
their motors.
The generator can produce a maximum
wattage of 4500W for a short period of time
(seconds) to cover the extra starting power
required by your electronic devices.
Electronic
Device
Wattage
Calculation
Find the wattage information of each device you plan to connect. The information should
be listed on the device or in its instruction manual, or you may refer to page 17, Table
2 - Estimated Wattages of Common Electrical Appliances.
The wattage can be calculated using this equation: Watts = Volts x Amperes
To calculate the total running watts of your
devices:
+ Add up the running wattages of all the
device(s) you plan to connect.
= The total running (rated) wattage.
This wattage should NOT exceed the run-
ning wattage of 3600W.
It is recommended to maintain a load at or
below 3240W (90% of the rated output) to
ensure steady voltage output and to prolong
the generator’s lifespan.
To calculate the total starting watts of your
devices:
+ Add up the total running wattage of all the
device(s) you plan to connect.
+ Add the single highest ADDITIONAL start-
ing wattage out of the device(s) you plan to
connect.
= The total starting (surge) wattage.
This wattage should NOT exceed the starting
wattage of 4500W.
If any of either of the total calculated running watts or starting watts is higher than the capac-
ity of your generator, adjust the load until both wattage requirements are met. Otherwise you
will overload the generator, and cause damage to the engine and your electrical device(s).
Table 1 - How to Calculate Wattages
1716
USING YOUR GENERATOR
CALCULATING THE WATTAGE OF YOUR DEVICE(S) - CONTINUED
The chart below serves as a reference for the estimated wattage requirements of common electrical devices. How-
ever, do not solely rely on this chart - all electronics and appliances are built differently. Always check the wattage
listed on the electrical device before consulting this chart.
Tool or Appliance Rated (Running) Watts Surge (Starting) Watts
Hot Plate 2500 0
Saw - Radial Arm 2000 2000
Electric Stove (Each Element) 1500-2800 0
Saw - Circular 1500 1500
Air Compressor (1 HP) 1500 3000
Window Air Conditioner 1200 1800
Saw - Miter 1200 1200
Microwave 1000 0
Well Water Pump 1000 1000
Sump Pump 800 1200
Refrigerator Freezer 800 1200
Furnace Blower 800 1300
Computer 800 0
Electric Drill 600 900
Television 500 0
Deep Freezer 500 500
Garage Door Opener 480 0
Stereo 400 0
Box Fan 300 600
Clock Radio 300 0
Security System 180 0
DVD Player / VCR 100 0
Common Light Bulb 75 0
Table 2 - Estimated Wattages of Common Electrical Appliances
NOTE: Become familiar with the functions and capacity of each component on the control panel before con-
necting electrical devices. See page 10 for more information about the components of the control panel. Do
not overload generator or individual panel receptacles. Do not connect 50Hz or 3-phase loads to the generator.
1918
USING YOUR GENERATOR
CONNECTING ELECTRICAL DEVICES
1. Before connecting electrical devices, allow the generator to run for a few minutes to stabilize the speed and
voltage output.
2. Select the device with the highest wattage, and make sure it is turned off. Plug the device into the matching
generator outlet and then turn the device on. Allow the engine to stabilize.
3. Repeat step 2 to plug in each additional device. Do not attempt to plug in or start multiple devices at the same
time.
SOME NOTES ABOUT POWER CORDS
Long or thin extension cords can drain the power provided to your electrical devices. Refer to the following chart
in determining the necessary gauge extension cord for each of your devices. Round up to the higher amperage in
the chart to maximize safety.
Table 3 - Power Cord Requirement Guide*NR = Not Recommended
Device Requirements Max. Cord Length (ft) by Wire Gauge
Amps Watts (120V) #8 wire #10 wire #12 wire #14 wire #16 wire
2.5 300 NR NR NR 375 250
5 600 NR NR 300 200 125
7.5 900 NR 350 200 125 100
10 1200 NR 250 150 100 50
15 1800 NR 150 100 65 NR
20 2400 175 125 75 50 NR
25 3000 150 100 60 NR NR
30 3600 125 65 NR NR NR
40 4800 90 NR NR NR NR
1918
WARNING! NEVER CONNECT TO A BUILDING'S ELECTRICAL SYSTEM without using a transfer switch,
installed by a qualified electrician, as a separately derived system.
NOTE: For power outages, permanently installed, stationary generators are better suited for providing backup
power to your home. Even a properly connected portable generator can become overloaded. This may result
in overheating or stressing the machine’s components, possibly leading to generator failure.
SHUTTING OFF YOUR GENERATOR
CAUTION! Unplugging running devices can cause damage to the generator. Never stop the engine with
electrical devices connected and running.
WARNING! Allow the generator to cool down before touching areas that become hot during use.
CAUTION! Allowing gasoline to sit in the fuel tank for long periods of time can make it difficult to start the gen-
erator in the future. Never store the generator for extended periods of time (over 2 months) with fuel in the fuel
tank. Refer to "Storing The Generator" on page 25.
IMPORTANT: Always ensure that the fuel valve
and the engine switch are in the OFF position
when the generator is not in use.
MANUAL SHUTOFF
1. Turn off all electrical devices prior to unplugging them
from the generator. Unplugging running devices can cause
damage to the generator. Never start or stop the generator
with electrical devices plugged in or turned on.
2. Let engine run at no-load for several minutes to stabilize
internal temperatures of engine and generator.
3. Turn the fuel valve to the OFF position (Fig. 8). Let the
generator run until the fuel is used up.
4. Flip the engine ON/OFF switch (page 9) to the OFF
position.
5. Drain the carburetor. Refer to "Draining The Carburetor"
on page 22.
FUEL VALVE
OFF
ON
Fig. 8
NOTE: If for some reason (e.g. refueling, moving the generator, etc.) you need to shut down the generator
quickly, simply flip the engine switch to OFF. However, doing this will allow fuel to remain in the carburetor, and
will lead to problems if the carburetor is not drained after use.
USING YOUR GENERATOR
2120
MAINTENANCE
WARNING! Never perform maintenance operations while the generator is running. Before maintaining or
servicing the generator, turn OFF the generator, disconnect all devices and allow the generator to cool down.
NOTE: Failure to properly maintain the generator will void the warranty.
RECOMMENDED MAINTENANCE SCHEDULE
Proper routine maintenance of the generator will help prolong the life of the machine. Please perform maintenance
checks and operations according to the maintenance schedule below, Table 4. If there are any questions about the
maintenance procedures listed in this manual, please contact customer service at 1-800-232-1195 (M-F 8-5 CST),
or email [email protected].
IMPORTANT GENERATOR MAINTENANCE TIPS:
• Drain your carburetor after each use and before storage to prevent it from clogging.
• Do not store the generator with fuel inside the tank for more than 2 months - the fuel will go bad.
• Run the generator for 20 to 30 minutes every month to maximize its lifespan.
Recommended
Maintenance Schedule
Every 8
Hours or
Daily
Every 25
Hours
Every 3
Months or
50 Hours
Every 6
Months or
100 Hours
Before
Storage
As
Necessary
Engine Oil
Check Level X
Replace X* X
Air Filter
Check X*
Clean X*
Spark Plug
Check/Clean/
Regap
X
Change X X
Fuel
Check Level X
Drain X X
Carburetor Drain X X
Spark
Arrestor
Check/Clean X
Table 4 - Recommended Maintenance Schedule* Clean/change more often under dusty conditions
or operating under heavy load.
2120
MAINTENANCE
WARNING! Never clean the generator when it is running! Never clean with a bucket of water or a hose.
Water can get inside the working parts of the generator and cause corrosion or a short circuit.
CLEANING YOUR GENERATOR
Keep the generator clean to prevent improper operation or machine damage from dirt and debris. Inspect all ven-
tilation openings on the generator. These openings must be kept clean and unobstructed.
If the generator becomes dirty, use a damp cloth to wipe exterior surfaces. Use a soft bristle brush to loosen dirt
and oil and use a vacuum to pick up loose dirt. Use low pressure air (not to exceed 25 PSI) to blow away dirt.
CHECKING/ADDING OIL
Check the oil level before each use and every 8 hours of operation (refer to page 20, Table 4). The oil capacity
of the generator engine is 20.3 fl. oz. (0.6 L). Add oil when the oil level is low. For the proper type and weight of
oil refer to page 11, Fig. 1. This is a critical step for proper engine starting. The generator is equipped with a with
low-oil shut down to protect it from running without oil.
To check the oil level and/or add oil refer to "Step 1 - Add/Check Oil" on page 11.
TIP: Your WEN generator is compatible with the WEN 55201 Magnetic Oil Dipstick (not included), available for
purchase at wenproducts.com. The dipstick’s industrial-strength magnetic tip will collect metal shavings from
your generator’s oil tank to help preserve the engine and extend your generator’s lifespan.
DRAINING/CHANGING OIL
Change the oil according to the Recommended Maintenance Schedule (refer to page 20, Table 4). Change
the oil more often if operating under heavy load or high ambient temperatures. It is also necessary to drain the oil
from the crankcase if it has become contaminated with water or dirt. Changing the oil when the engine is warm
allows for complete drainage.
Fig. 9
1. Place generator on a level, elevated platform. Prepare
an approved oil-storage container underneath the oil drain
bolt next to the oil dipstick to catch the oil as it drains. See
Fig. 9. NOTE: To avoid possible fuel spills from the car-
buretor bowl, drain the carburetor (refer to "Draining The
Carburetor" on page 22) before draining the oil.
2. Unscrew the oil drain bolt and allow oil to drain from the
engine completely.
3. Reinstall the oil drain bolt and tighten it securely. Wipe
clean any oil spillage.
4. To add new oil, refer to "Step 1 - Add/Check Oil" on page
11.
Dipstick
Oil Drain
Bolt
NOTE: Never dispose of used engine oil in the trash or down a drain. Please call a local recycling center or auto
garage to arrange proper oil disposal.
2322
MAINTENANCE
WARNING! Running the engine with a dirty, damaged or missing air filter element can result in danger to
the operator and cause the engine to wear out prematurely.
Fig. 10
Fig. 11
NOTE: Make sure to drain your carburetor before
storing the generator for long periods of time.
DRAINING THE CARBURETOR
Drain the carburetor after every use and before storing
the generator (refer to page 20, Table 4). Draining the
carburetor can help prevent build-up and blockages caused
by stagnant fuel inside of the carburetor.
1. Prepare an approved gasoline-storage container under
the carburetor to collect the drained fuel.
2. The carburetor can be accessed from the backside of
the generator between the engine and the air filter. To drain
the carburetor, open up the carburetor drain screw with a
Phillips-head screwdriver and drain out any gasoline that
has built up inside. See Fig. 10.
3. Once the fuel has drained, close the drain screw.
INSPECTING/CLEANING THE AIR FILTER
Inspect and clean the air filter every 50 hours of operation (refer to page 20, Table 4). Routine maintenance of
the air filter helps maintain proper airflow to the carburetor. Occasionally check that the air filter is free of excessive
dirt. Clean air filter more frequently in dirty or dusty conditions.
1. Remove the air filter cover by unscrewing the cover lock
knob at the bottom of the air filter cover. See Fig. 11.
2. Remove the foam, sponge-like air filter element from the
casing. Wipe excessive oil and any dirt from inside of the
air filter casing.
3. Check the foam, sponge-like air filter element.
a) Good elements can be washed in soapy water. Dry
the element in clean cloth (do not twist it). Add a few
drops of engine oil to the air filter element and spread it
evenly. A small amount of oil left in the element is normal
and necessary for the engine to work properly.
b) Damaged elements should be replaced with a new
one. Replacement air filters can be purchased from
wenproducts.com by searching part number
GN4500-167.1.
4. Reinstall the air filter element and air filter cover.
Air Filter
Cover
Cover
Lock
Drain Screw
2322
MAINTENANCE
INSPECTING/CLEANING THE SPARK ARRESTOR
Inspect and clean the spark arrestor every 100 hours of
operation (refer to page 20, Table 4). The spark arrestor
is located outside the muffler, which gets very hot during
operation. Allow the engine to cool completely before ser-
vicing the spark arrestor.
1. Remove the screw/clamp that secures the spark arrestor
to the muffler. See Fig. 12.
2. Remove the spark arrestor screen.
3. Carefully clean and remove the carbon deposits from the
spark arrestor screen with a wire brush. Replace the spark
arrestor if it is damaged. Replacement spark arrestors can
be purchased from wenproducts.com by searching the
part number GN4500-026.1.
4. Reinstall the spark arrestor in the muffler and secure it in
place with the screws.
SPARK PLUG MAINTENANCE
Inspect and change the spark plug every 100 hours of
operation (refer to page 20, Table 4). The spark plug
is important for proper engine operation. Check the spark
plug regularly to maintain proper engine operation. A good
spark plug should be intact, free of deposits, and properly
gapped.
1. Gently pull on the spark plug boot to remove it. Be care-
ful not to tear insulation or wire. See Fig. 13.
2. Use the included spark plug wrench (Fig. 14) to unscrew
the spark plug from the engine. Remove the spark plug
from the engine. TIP: There is limited space for the wrench
to turn. Use both rows of holes in the spark plug wrench to
gain leverage to loosen the plug.
3. Visually inspect the spark plug. If it is cracked or chipped,
or if the electrodes are worn or burned, discard it and re-
place with a new spark plug. We recommend replacing it
with an NGK BP7ES/Torch F7TC spark plug. These can be
purchased from wenproducts.com by searching part num-
ber DF475-145.
4. If re-using the spark plug, use a wire brush to clean any
dirt from around the spark plug base, then re-gap the spark
plug.
Instructions continue on the next page.
Fig. 12
Fig. 13
Fig. 14
Spark Plug Boot
Spark Arrestor
Cylinder Assembly
Wrench (1)Handle (1)
Muffler
2524
MAINTENANCE
Fig. 15
Fig. 16
5. Measure the plug gap with a spark plug gap gauge. The
gap should be 0.7 to 0.8 mm (0.028-0.031 in). Carefully
adjust the gap if necessary. See Fig. 15.
6. Screw the spark plug back into the spark plug hole us-
ing the spark plug wrench. Do not over-tighten spark plug.
Recommended tightening of the spark plug is ½ to ¾ of a
turn (15 ft-lb torque/20.33 Nm) after the spark plug gasket
contacts the spark plug hole.
7. Reinstall the spark plug boot over the spark plug.
DRAINING THE FUEL TANK
Drain and clean the fuel tank each year, or before storing
the generator for longer than two months.
1. Prepare an approved gasoline-storage container to col-
lect the drained fuel. Place it near the fuel valve.
2. Turn the fuel valve to the OFF position.
3. Locate the fuel line between the fuel valve and the carbu-
retor. Disconnect the fuel line from the fuel valve. See Fig.
16. NOTE: A small amount of fuel may leak from the fuel
line during removal.
4. Place a funnel below the fuel valve opening, and direct
the other end of the funnel over the prepared container.
5. Turn the fuel valve to the ON position to start draining
the fuel from the fuel valve opening. NOTE: The draining
process may take a few hours, depending on the amount of
fuel in your gas tank.
6. Once the fuel is completely drained, turn the fuel valve to
the OFF position.
7. Start and run the engine until the fuel runs out.
8. Drain the carburetor. Refer to "Draining The Carburetor"
on page 22.
CAUTION! Store the emptied gasoline in a suitable
place. Never store fuel for more than 2 months.
0.7 - 0.8mm
Fuel Line
Fuel Valve
2524
TRANSPORTATION & STORAGE
WARNING! Avoid direct sunlight inside a vehicle. If the generator is left in an enclosed vehicle for many
hours, the high temperature could cause the fuel to vaporize and result in a possible explosion.
TRANSPORTING THE GENERATOR
To prevent fuel spillage when transporting, be sure to perform the following:
1. Tighten the fuel cap and turn the fuel valve to the OFF position.
2. Flip the engine ON/OFF switch to the OFF position.
3. Drain the fuel tank if possible. Refer to "Draining The Fuel Tank" on page 24.
4. Keep the generator upright. Never place the generator on its side or upside down - doing so could damage the
internal components of the generator and make it difficult to start.
STORING THE GENERATOR
Shut off the generator and allow the unit to cool to room temperature before storing it. NEVER place any type of
storage cover on the generator while it is still hot. Do not obstruct any ventilation openings.
For Short Periods (30 to 60 Days):
• Drain the carburetor. Refer to "Draining The Carburetor" on
page 22.
• Add fuel stabilizer: Follow the suggested portions and
instructions of your preferred stabilizer. Run the engine for
15 to 20 minutes, allowing the fuel stabilizer to mix with the
gasoline and circulate through the carburetor, and then top
off with fuel. Filling the fuel tank full reduces the amount of
air in the tank and helps fight deterioration of fuel.
For Extended Periods (Over 60 Days):
• Drain the fuel tank and carburetor.
Refer to "Draining The Fuel Tank"
on page 24, and "Draining The
Carburetor" on page 22.
• Never store generator with fuel in the
tank for more than two months.
• Change the engine oil. Refer to
"Checking/Adding Oil" on page 21.
WARNING! Store the generator upright in a cool and dry location, away from sources of heat, open flames,
sparks or pilot lights.
Follow the procedures below for properly storing your generator.
We highly recommend running your generator once a month for
20 to 30 minutes. Plug in a small load in to ensure there is proper
power output.
Please recycle the packaging and electronic components where facilities exist. Please contact your
local auto garage or recycling facility to properly dispose of oil/fuel.
TIP: Your WEN generator is compatible
with the WEN 56406 Medium Generator
cover (not included), available for purchase
at wenproducts.com.
PRODUCT DISPOSAL
Do not dispose of used generator or parts with your household waste. This product contains electrical or electronic
components that should be recycled. Please take this product to your local recycling facility for responsible dis-
posal to minimize its environmental impact.
Do not dispose of used oil or fuel in the trash or down a drain. Please contact your local recycling center or auto
garage to arrange proper oil/fuel disposal.
2726
TROUBLESHOOTING GUIDE
WARNING! Stop using the generator immediately if any of the following problems occur or risk serious
personal injury. If you have any questions, please contact customer service at 1-800-232-1195 (M-F 8-5 CST),
or email [email protected].
PROBLEM POSSIBLE CAUSE SOLUTION
Engine will not
start.
Engine switch is set to OFF. Set engine switch to ON.
Fuel valve is turned to OFF. Turn fuel valve to ON.
Oil is low. Add or replace oil.
Engine is out of fuel. Add fuel.
Engine is filled with
contaminated or old fuel.
Drain fuel in the tank. Fill with fresh fuel.
Spark plug is dirty or broken. Clean or replace the spark plug.
Carburetor is air locked.
Shut off the fuel valve. Remove the bolt from the bottom of the
carburetor. Take off the carburetor bowl to allow it to reset. Re-
place carburetor bowl and reinstall the bolt.
Engine runs
but there is no
electrical output
whatsoever.
Circuit breaker has been tripped
due to overload.
Turn off and unplug electrical device(s). Wait 5 minutes, then
press the circuit breaker to reset. Check the total wattage of the
devices and reduce the load if it exceeds the capacity of the gen-
erator. Then plug the loads back in one by one.
Bad connecting cords/wires.
Check the power cords and extension cords. Do not use if any
cord is damaged. Replace damaged cords immediately.
Bad electrical device connected to
the generator.
Try connecting a different device.
Voltage regulator is bad Check voltage regulator with a multimeter, replace if necessary.
Carbon brushes worn or need
adjustment
Check carbon brushes, adjust so that both brushes extrude the
same length, or replace if worn.
Generator runs but
does not support all
electrical devices
connected.
Generator is overloaded.
Turn off and unplug all electrical devices. Wait 5 minutes, then
press the circuit breaker to reset. Reduce load as necessary, then
plug devices back in one by one.
Short circuit in one of the devices. Try disconnecting any faulty or short-circuited electrical loads.
Air filter is dirty. Clean or replace the air filter element.
Engine is “hunting”
during operation
(engine RPM is
fluctuating).
The fuel isn’t running through the
fuel valve.
Turn off the generator and wait for it to cool down. Check if the
fuel is properly and consistently going through the fuel valve.
The air filter is clogged.
Turn off the generator and wait for it to cool down. Check for any
blockage in the air filter. Check and clean the air filter as neces-
sary.
The muffler or spark arrestor is
blocked
Turn off the generator and wait for it to cool down. Check if the
spark arrestor is blocked. Clean with metal brush as necessary.
There is gunk in the carburetor
preventing a consistent fuel/air
mixture.
Turn off the generator and wait for it to cool down. Use “gunk
remover” spray on the carburetor jets.
2726
WIRING DIAGRAM
KEY
BlO
R
Orange
Red
White
PinkP
Bu
Gr
Black
Blue
Gray
Light BlueLB
Br/R
G/Y
Bl/W
Brown/Red
Green/Yellow
Black/White
BrownBr
W
ALTERNATOR
ENGINE
CONTROL PANEL
AVR
Oil Sensor
Spark
Plug
Engine Switch
L5-30R TT-30R
5-20R 5-20R
Ignition
Coil
Stator
Coil
Sub-Field
Coil
Rotor
Coil
Multi-
Meter
Breaker
Breaker 20A
Breaker
20A
Neutral Bonded
Ground
Terminal
2928
EXPLODED VIEW & PARTS LIST
48
65
58
56
65.1
55
54
53
3
52
57
51
69
9
1
9
71
48
2
4
10
11
37
2
12
42
18
72
12
3
39
36
67
62
31
61
29
33
32
35
59
19
60
44
41
30
48
22
24
26
73
27
20
21
23
25
28
45
49
68
50
48
46
38
40
48
47
48
5
12
8
9
16
17
14
17
13
15
6
7
43
66
70
64
63
12
34
ENGINE EXPLODED VIEW
2928
EXPLODED VIEW & PARTS LIST
ENGINE PARTS LIST
No. Part No. Description Qty.
1
GN4500-101 Crankcase 1
2 GN4500-102 Ball Bearing, 6205 2
3 DF475-103 Oil Seal 2
4 GN4500-104 Governor Assembly 1
5 GN4500-105 Governor Arm Shaft 1
6 DF475-106
Governor Arm Shaft
Washer
1
7 DF475-107 Lock Pin 1
8 DF475-108 Drain Screw 2
9 DF475-109 Drain Screw Washer 2
10 DF475-110
Oil Level Switch
Assembly
1
11 DF475-071 Bolt, M6x16 2
12 DF475-177
Crankcase Dowel Pin,
Ø8x12
4
13 GN4500-113 Piston 1
14 GN4500-114 Piston Ring Set 1
15 GN4500-115 Connecting Rod 1
16 DF475-116 Piston Pin 1
17 DF475-117 Piston Clip 2
18 DF475-118
Crankcase Cover
Assembly
1
19 GN4500-119 Cylinder Head 1
20 DF475-120 Intake Valve 1
21 GN4500-121 Exhaust Valve 1
22 DF475-122
Intake Valve Spring
Seat, Lower
1
23 DF475-123 Valve Spring 2
24 DF475-124
Intake Valve Spring
Seat, Upper
1
25 DF475-125
Exhaust Valve Spring
Seat
1
No. Part No. Description Qty.
26 DF475-126 Push Rod Guide Plate 1
27 DF475-127 Rocker Assembly 2
28 DF475-128 Rotator 1
29 DF475-129 Stud Bolt (Carburetor) 2
30 DF475-130 Stud Bolt 2
31 GN4500-131 Carburetor Assembly 1
32 GN4500-132 Fuel Line 1
33 DF475-060
Clip, Fuel Line,
Ø7.5mm
1
34 DF475-134 Governor Arm 1
35 DF475-168 Fuel Line Sleeve 1
36 DF475-136 Nut, M6 2
37 GN4500-137 Crankshaft Assembly 1
38 GN4500-138 Valve Lifter 2
39 DF475-139
Crankcase Cover
Gasket
1
40 GN4500-140 Camshaft Assembly 1
41 DF475-141 Dowel Pin 2
42 DF475-142 Bolt, M8x30 6
43 DF475-143 Cylinder Head Gasket 1
44 DF475-144 Bolt, M8x60 4
45 DF475-145
Spark Plug, Torch
F7TC (NGK BP7ES)
1
46 DF475-146 Push Rod 2
47 GN4500-147 Shroud 1
48 DF475-148 Bolt, M6x12 13
49 DF475-149
Cylinder Head Cover
Gasket
1
50 DF475-150 Cylinder Head Cover 1
51 GN4500-151 Airflow Cover 1
NOTE: Replacement parts can be purchased from wenproducts.com, or by calling our customer service at
(800) 232-1195, M-F 8-5 CST. Parts and accessories that wear down over the course of normal use are not
covered by the two-year warranty. Not all parts may be available.
3130
EXPLODED VIEW & PARTS LIST
ENGINE PARTS LIST - CONTINUED
No. Part No. Description Qty.
52 GN4500-152 Bolt, M6x28 1
53 GN4500-153 Flywheel Assembly 1
54 GN4500-154 Recoil Starter Fan 1
55 GN4500-155 Recoil Starter Cup 1
56 DF475-155 Nut, M14 1
57 GN4500-157 Ignition Coil Assembly 1
58 DF475-157 Bolt, M6x25 2
59 GN4500-159
Gasket, Carburetor
Insulator
1
60 DF475-159 Carburetor Insulator 1
61 DF475-160 Gasket, Carburetor 1
62 GN4500-162 Gasket, Air Filter 1
63 DF475-162 Governor Rod 1
64 DF475-163 Throttle Return Spring 1
65 GN4500-165
Recoil Starter
Assembly
1
N.P. GN4500-165.1 Recoil Starter 1
66 GN4500-166
Upper Shroud
Assembly
1
67 GN4500-167 Air Filter Assembly 1
N.P. GN4500-167.1 Air Filter Element 1
68 DF475-167 Breather Tube 1
69 GN4500-169 Clip 1
70 DF475-169 Governor Spring 1
71 GN4500-171
Oil Level Switch
Amplifier
1
72 DF475-171 Dipstick Assembly 1
73 DF475-175
Rocker Arm Adjuster
Assembly
2
NOTE: Replacement parts can be purchased from wenproducts.com, or by calling our customer service at
(800) 232-1195, M-F 8-5 CST. Parts and accessories that wear down over the course of normal use are not
covered by the two-year warranty. Not all parts may be available.
N.P. = Not Pictured
3130
EXPLODED VIEW & PARTS LIST
NOTE: Replacement parts can be purchased from
wenproducts.com, or by calling our customer service
at (800) 232-1195, M-F 8-5 CST. Parts and accesso-
ries that wear down over the course of normal use are
not covered by the two-year warranty. Not all parts
may be available.
GENERATOR EXPLODED VIEW
21
32
21
32
21
32
41
40
13
11.2
11.1
30
37
36
3
37
36
37
36
11
5
27
24
37
36
12
25
6
43
10
1
39
4
21
21
32
22
22
9
22
22
9
22
22
8
26
26.1
31
20
35
35
35
21
46
33
17
34
35
38
15
47
18
2
28
21
45
19
7
16
21
23
42
21
44
22
29
21
14
21
14
21
14
21
14
29.8
29.5
29.4
29.3
29.1
29.2
29.6
29.7
22
22
9
3332
EXPLODED VIEW & PARTS LIST
GENERATOR PARTS LIST
No. Part No. Description Qty.
1 GN4500-001 Alternator Assembly 1
2 DF475-002 Motor Stand 1
3 GN4500-003
Clip, Fuel Line,
Ø11.5mm
1
4 GN4500-004 Clip, Fuel Line, Ø12mm 1
5 DF475-005 Nut, M8 2
6 DF475-076 Connecting Tube 1
7 GN4500-007 Frame 1
8 DF475-008 Isolator A 2
9 DF475-009 Isolator B 2
10 DF475-075 Carbon Tank Assembly 1
11 GN4500-011 Fuel Tank Assembly 1
11.1 DF475-079 Fuel Filter 1
11.2 DF475-078 Fuel Gauge 1
12 GN4500-012 Fuel Valve 1
13 DF475-073 Fuel Tank Cap Assembly 1
14 DF475-072 Paper Washer 4
15 DF475-069 Grounding Wire 1
16 GN4500-016 Engine Assembly 1
17 GN4500-017 Bolt, M8-1.0x220 1
18 DF475-018
Rotor Bolt Gasket,
Ø8.5x24x3
1
19 DF475-065 Toothed Washer, 6mm 1
20 GN4500-020 Bolt, M6x165 4
21 DF475-021 Bolt, M6x12 14
22 DF475-064 Nut, M8 10
23 DF475-023 Air Filter Bracket 1
24 DF475-024 Muffler Gasket 1
25 DF475-063 Clip, Fuel Line, Ø10mm 1
26 GN4500-026 Muffler 1
26.1 GN4500-026.1 Spark Arrestor 1
27 DF475-027 Lock Washer, 8mm 2
28 DF475-062 Bolt, M6x40 1
29 GN4500-029 Control Panel Assembly 1
No. Part No. Description Qty.
29.1 GN4500-029.1 Engine Switch 1
29.2 GN4500-029.2 Multi-meter 1
29.3 GN4500-029.3
NEMA 5-20R 120V 20A
Duplex Receptacle
2
29.4 GN4500-029.4 AC Breaker, 20A 2
29.5 GN4500-029.5
NEMA TT-30R 120V
30A RV Receptacle
1
29.6 GN4500-029.6
NEMA L5-30R 120V
30A Receptacle
1
29.7 GN4500-029.7 Main Breaker 1
29.8 GN4500-029.8 Grounding Nut 1
30 DF475-061 Clip, Fuel Line, Ø9.5mm 1
31 DF475-050 Muffler Bracket 1
32 GN4500-032 Foot 4
33 DF475-033
Automatic Voltage
Regulator
1
34 DF475-034 Bolt, M5x16 1
35 DF475-035 Bolt, M5x12 7
36 DF475-036 Fuel Tank Washer 4
37 DF475-037 Bolt, M6x25 4
38 DF475-038 Generator End Cover 1
39 DF475-060 Clip, Fuel Line, Ø7.5mm 1
40 DF475-058
Breather Valve
Assembly
1
41 DF475-057
Connecting Tube (Fuel
Tank)
1
42 DF475-077 Dustproof Cover 1
43 GN4500-043 Damper, Fuel Tank 1
44 DF475-052 Damper 1
45 DF475-045 Nut, M6 1
46 DF475-046 Bolt, M8x16 2
47 DF1100-006 Lock Washer, 5mm 1
45 DF475-045 Nut, M6 1
46 DF475-046 Bolt, M8x16 2
47 DF1100-006 Lock Washer, 5mm 1
3332
WARRANTY
WEN Products is committed to building tools that are dependable for years. Our warranties are consistent with this
commitment and our dedication to quality.
LIMITED WARRANTY OF WEN PRODUCTS FOR HOME USE
GREAT LAKES TECHNOLOGIES, LLC (“Seller”) warrants to the original purchaser only, that all WEN consumer power
tools will be free from defects in material or workmanship during personal use for a period of two (2) years from date
of purchase or 500 hours of use; whichever comes first. Ninety days for all WEN products if the tool is used for pro-
fessional or commercial use. Purchaser has 30 days from the date of purchase to report missing or damaged parts.
SELLER’S SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under this Limited Warranty and, to the extent per-
mitted by law, any warranty or condition implied by law, shall be the replacement of parts, without charge, which are
defective in material or workmanship and which have not been subjected to misuse, alteration, careless handling,
misrepair, abuse, neglect, normal wear and tear, improper maintenance, improper storage, incorrect lubricants/fuels,
or other conditions adversely affecting the Product or the component of the Product, whether by accident or inten-
tionally, by persons other than Seller. To make a claim under this Limited Warranty, you must make sure to keep a
copy of your proof of purchase that clearly defines the Date of Purchase (month and year) and the Place of Purchase.
Place of Purchase must be a direct vendor of Great Lakes Technologies, LLC. Purchasing through third party vendors,
including but not limited to garage sales, pawn shops, resale shops, or any other secondhand merchant, voids the
warranty included with this product. Contact [email protected] or 1-800-232-1195 with the following
information to make arrangements: your shipping address, phone number, serial number, required part numbers,
and proof of purchase. Damaged or defective parts and products may need to be sent to WEN before the replace-
ments can be shipped out.
Upon the confirmation of a WEN representative, your product may qualify for repairs and service work. When re-
turning a product for warranty service, the shipping charges must be prepaid by the purchaser. The product must
be shipped in its original container (or an equivalent), properly packed to withstand the hazards of shipment. The
product must be fully insured with a copy of the proof of purchase enclosed. There must also be a description of the
problem in order to help our repairs department diagnose and fix the issue. Repairs will be made and the product
will be returned and shipped back to the purchaser at no charge for addresses within the contiguous United States.
THIS LIMITED WARRANTY DOES NOT APPLY TO ITEMS THAT WEAR OUT FROM REGULAR USAGE OVER TIME,
INCLUDING FILTERS, SPARK PLUGS, VOLTAGE REGULATORS, BRUSHES, GASKETS, O-RINGS, WHEEL KITS, BAT-
TERIES, RECOIL STARTERS, HIGH PRESSURE HOSES, SPRAY GUNS, ETC. ANY IMPLIED WARRANTIES SHALL BE
LIMITED IN DURATION TO TWO (2) YEARS FROM DATE OF PURCHASE. SOME STATES IN THE U.S. AND SOME
CANADIAN PROVINCES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE
ABOVE LIMITATION MAY NOT APPLY TO YOU.
IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING BUT
NOT LIMITED TO LIABILITY FOR LOSS OF PROFITS) ARISING FROM THE SALE OR USE OF THIS PRODUCT. SOME
STATES IN THE U.S. AND SOME CANADIAN PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF IN-
CIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS
WHICH VARY FROM STATE TO STATE IN THE U.S., PROVINCE TO PROVINCE IN CANADA AND FROM COUNTRY TO
COUNTRY.
THIS LIMITED WARRANTY APPLIES ONLY TO ITEMS SOLD WITHIN THE UNITED STATES OF AMERICA, CANADA
AND THE COMMONWEALTH OF PUERTO RICO. FOR WARRANTY COVERAGE WITHIN OTHER COUNTRIES, CON-
TACT THE WEN CUSTOMER SUPPORT LINE. FOR WARRANTY PARTS OR PRODUCTS REPAIRED UNDER WARRAN-
TY SHIPPING TO ADDRESSES OUTSIDE OF THE CONTIGUOUS UNITED STATES, ADDITIONAL SHIPPING CHARGES
MAY APPLY.
34
NOTESNOTES
35
NOTES
v.2019.09.25
THANKS FOR
REMEMBERING
