
WARNING: SAVE THIS MANUAL FOR FUTURE REFERENCE
PORTABLE GENERATOR
USER'S MANUAL
R
GENMAX GENERATOR
GM12000ED
Portable Dual Fuel Generator
9000(GAS.)/8000(LPG) Running Watts
12000(GAS.)/9000(LPG) Peak Watts
This manual contains important information regarding safety. Operation,
maintenance and storage of this product. Before use, read carefully and
understand all cautions, warnings, instructions and product labels. Failure to do
so could result in serious personal injury and/or property damage.

1
UNPACKING
Always have assistance when lifting
the generator. The generator is heavy;
lifting it could cause bodily harm.
Avoid cutting on or near staples to
prevent personal injury.
Tools required - box cutter or similar device.
1. Carefully cut the packing tape on top of the carton.
2. Remove socket wrench, and oil funnel and save for
later.
3. Carefully cut two sides of the carton to remove the
generator.
WHAT COMES IN THE BOX
Spark Plug Socket Wrench (1)
Dual-Purpose Screwdriver (1)
User Manual (1)
Warranty Information (1)
Funnel (1)
LPG Hose (1)
1100ml 10W30 Oil (1)
DISCLAIMERS:
All information, illustrations and specifications in this manual are based on the latest information available at the
time of publishing. The illustrations used in this manual are intended as representative reference views only.
Moreover, because of our continuous product improvement policy, we may modify information, illustrations and/or
specifications to explain and/or exemplify a product, service or maintenance improvement. We reserve the right to
make any change at any time without notice. Some images may vary depending upon which model is shown.
ALL RIGHTS RESERVED:
No part of this publication may be reproduced or used in any form by any means - graphic, electronic or
mechanical, including photocopying, recording, taping or information storage and retrieval systems - without the
written permission of CHONGQING DINKING POWER MACHINERY CO., LTD
This manual contains important instructions for operating this generator. For your safety and
the safety of others, be sure to read this manual thoroughly before operating the generator.
Failure to properly follow all instructions and precautions can cause you and others to be
seriously hurt or killed.

2
DESCRIPTION OF FITTINGS
Spark Plug Socket Wrench
Used in spark plug maintenance,
inspection, and installation.
Phillips and slot blade
screwdriver used for generator
maintenance.
Dual-Purpose Screwdriver Funnel
It's used to oil the generator.
LPG Hose
1485 mm
Hose length
1.312"-5ACME
Inside Diameter
LPG Hose
Pressure 1psi
First Stage Reducing Valve
Gas Cylinder Joint
5/8"-18UNF
Inside Diameter
Connect the LPG tank to transmit LPG fuel to the generator.
Note: Actual tools may differ in appearance or design from image shown.
1100ml 10W30 Oil
Be sure to add oil before starting
the generator.

3
LIMITED WARRANTY
1. DURATION : One (1) year from the date of purchase by the original purchaser ( retail customer ) on products used
solely for consumer applications; if a product is used for business, commercial, or industrial applications, the warranty
per iod will be limited to ninety (90) days from the date of purchase.
2. WHO GIVES THIS WARRANTY (WARRANTOR):
CHONGQING DINKING POWER MACHINERY CO., LTD
3. WHO RECEIVES THIS WARRANTY(PURCHASER):The original purchaser (other than for purposes of resale) of
the Genmax's generator.
4. WHAT PRODUCTS ARE COVERED BY THIS WARRANTY: Any portable generator supplied or manufactured by
Warrantor.
5. WHAT IS COVERED UNDER THIS WARRANTY: Substantial defects on material and workmanship which occur
within the duration of the warranty period.
6. WHAT IS NOT COVERED UNDER THIS WARRANTY:
A. Transportation changes for s ending the product to Warrantor or its authorized service representative for warranty
service, or for shipping repaired or replacement products back to the customer; these charges must be borne by the
customer.
B. Damages caused by abuse, accident, shipping, misuse, overloading, modification, and the effects of corrosion,
erosion and normal wear and tear.
C. Warranty is voided if the customer fails to install, maintain and operate the product in accordance with the
instructions and recommendations set forth in the owner's manual(s), or if the product is used as rental equipment.
D. Pre-delivery service, i.e. assembly, oil or lubricants, and adjustment.
E. Items or service that are normally required to maintain the product, i.e. lubricants and filters.
F. Warrantor will not pay for repairs or adjustments to the product, or for any costs or labour, performed without
Warrantor's prior authorization.
EXCLUSIONS AND LIMITATIONS : Warrantor makes no other warranty of any kind, express or implied. Implied
warranties, including warranties of merchantability and of fitness for a particular purpose, are hereby disclaimed. This
warranty service described above is the exclusive remedy under this warranty; liability for incidental and consequential
damages is excluded to the extent permitted by law.
7. RESPONSIBILITIES OF PURCHASER UNDER THIS WARRANTY:
A. The purchaser must provide dated proof of purchase and must notify Warrantor within the warranty period.
B. Deliver or ship the serviced generator or component to the nearest Warrantor's authorized service representative.
Freight costs, if any, must be borne by the purchaser.
8. HAVE QUESTIONS?
Email: service@genmaxpower.com Phone: 866-960-2920
Model Number: _____________________________________
Name: ___________________________________________
Serial Number: ______________________________________
Street Address: ___________________________________
Date Purchased: ____________________________________
Purchased From: ____________________________________
City, State, ZIP: ____________________________________
Country: __________________________________________
Phone Number: ___________________________________
E-Mail: ___________________________________________
WARRANTY CARD
R
GENERATOR INFORMATION

4
TABLE OF CONTENTS
LIMITED WARRANTY
3
SAFETY WARNING
5
SAFETY INSTRUCTIONS
6
NAMES OF COMPONENTS
8
CONTROL FUNCTIONS
11
PREPARATIONS
12
1.Fuel...........................................................................................................................................12
2.Oil..............................................................................................................................................12
3.Pre-use Inspection....................................................................................................................13
STARTING UP THE GENERATOR
14
SHUTTING DOWN THE GENERATOR
16
USING THE GENERATOR
17
1.Service Environment of the Generator.....................................................................................17
2.Generator Wiring......................................................................................................................17
3.Generator Grounding................................................................................................................18
4.Battery Charging.......................................................................................................................19
SERVICE AND MAINTENANCE
20
1.Spark Plug Inspection..............................................................................................................21
2.Adjustment of the Carburetor....................................................................................................22
3.Replacement of Oil...................................................................................................................22
4.Oil Filter.....................................................................................................................................23
5.Air Filter.....................................................................................................................................23
6.Fuel Filter Screen......................................................................................................................24
STORAGE AND TRANSPORT
25
1.Generator Storage....................................................................................................................25
2.Generator Transport.................................................................................................................26
TROUBLESHOOTING
27
TECHNICAL PARAMETERS
29
CIRCUIT DIAGRAM
30
CHOOSING A GENERATOR
31
INSTALLATION OF WHEELS AND HANDRAILS
9

5
SAFETY WARNING
Personal and property safeties of you and others are very vital. Please read the Safety
Warning in the User's Manual and the decals of the generator set carefully.The Safety
Warning can alert you to those potential hazards that could harm you and others. In front
of each Safety Warning, there is one of four words "DANGER" "WARNING",
"ATTENTION", and "CAREFUL". Details are as follows:
Failure to follow the instruction will result in
being in peril of your life or extremely serious
injury.
Failure to follow the instruction will result in
being in peril of your life or very serious injury.
Failure to follow the instruction will result in
minor injury.
Failure to follow the instruction will result in the
damage to your generator set and other properties.
For portable generators where the neutral is floating, the operator's manual shall include the following wording
or equivalent:
The portable generator stator winding is isolated from the frame and from the AC receptacle ground pin; and
Electrical devices that require a connection between one conductor pin and the grounded receptacle pin may not
function properly.
NEUTRAL FLOATING
CO DETECT technology monitors the accumulation of carbon monoxide (CO), a poisonous gas produced by
engine exhaust when the generator is running. If CO Sensor detects unsafe elevated levels of CO gas, it
automatically shuts off the engine. CO Sensor is not a substitute for an indoor carbon monoxide alarm or for safe
operation. DO NOT allow engine exhaust fumes to enter a confined area through windows, doors, vents or other
openings. Generators must ALWAYS be used outdoors, far away from occupied buildings with engine exhaust
pointed away from people and buildings. Meets the requirements of ANSI/PGMA G300-2018.
CO TECHNICAL WARNING

6
SAFETY INSTRUCTIONS
Before operating the generator, it will help you avoid accidents to read and understand the manual
and familiarize yourself with the safe operation procedures of the generator.
Please do not use indoors
Please do not use in humid
environment
Do not directly connect to the
household power supply system
Please do not smoke when refueling
Please do not spill when refueling
Please shut down the generator
before refueling

7
SAFETY INSTRUCTIONS
SAFETY LABELS AND DECALS
6
6

8
NAMES OF COMPONENTS
① Fuel Tank Cap: Open the fuel tank cap and fill with
proper amount of gasoline.
② Fuel Tank: Store the added gasoline.
③ Control Panel: Contains the reset breaker, outlets
and warning lights.
④ Magnetic Oil Dipstick: Absorb iron filings in the
engine oil. It is recommended to screw out the oil
dipstick every 50 hours to clean it.
⑤ Generator Frame: Protects the generator for easy
movement.
⑥ Wheel: Easy to move.
⑦ Muffler: Avoid contact until the engine is cooled
down. The spark arrestor prevents sparks from exiting
the muffler. It must be removed for servicing.
⑧ Spark Plug
⑨ Fuel Source Switch: Choice of fuel source.
⑩ Air Cleaner: To purify the waste gas.
⑪ Recoil Handle: Pull to start the engine.
⑫ Power is supplied when the generator Battery:
starts.
⑬ LPG Inlet: Connects the LPG inlet to the LPG
hose/regulator.
⑭ Cylinder Head
⑮ Handrail
⑯ Carburetor
⑰ Spark Plug
1
3
6
5
2
7
10
11
9
15
16
14
12
13
8
4

9
INSTALLATION OF WHEELS AND HANDRAILS
LIST OF PARTS
Wheel Handle
Support Foot
Wheel Shaft
Circular Gasket Φ16.5×Φ30×2
(Used of wheels)
R Pin
(Used of wheels)
Rubber Circular Gasket
Bolt M8×50
(Used of handle)
QTY: 2 QTY: 2 QTY: 2
QTY: 2 QTY: 2
QTY: 2
QTY: 4 QTY: 2
Bolt M8×16
(Used of supporting foot)
QTY: 4
Nut M8
QTY: 6

10
INSTALLATION OF WHEELS AND HANDRAILS
Align the two holes on the support seat with the
two holes on the bottom of the frame. Place two
bolts through the support seat hole and the frame
hole;
1.
Install the Wheel
Fasten the nut to the bolt, tighten with a wrench.
Install the other side in the same way.
2.
Install Support Foot
Put the axle through the wheel and the gasket,
connect to the rack;
1.
Insert the R pin into the hole in the wheel shaft. Install the other side in the
same way.
2.
Install Handrails
Place two gaskets into the holes on the left and
right sides of the handle, bolt the handle to the
frame;
1.
Fasten the nut to the bolt, tighten with a wrench. Install the other side in the
same way.
2.

11
CONTROL FUNCTIONS
① Power Indicator: Indicates the generator is ready
to be used.
② USB Duplex: 5V DC that come in 1 amps and2.1
amps.
③ AC Protector: If the generator is overload, the AC
protector will trip to block current.
④ ngine SwitchE : Press "START" engine running,
switch with rebound function.
⑤ Ground Terminal: The ground terminal is used to
externally ground the generator.
⑥ Three in one Digital Display Table: Voltage,
frequency, time display, press the button to switch.
⑦ Main Breake: A circuit breaker interrupts the
current when the whole circuit is overloaded.
⑧ CO Alarm: Flashing red light: dangerous levels of
carbon monoxide gas have built up leave immediately
until area has aired out. Move generator to well-
ventilated area before operation. Flashing yellow light:
carbon monoxide sensor malfunction. Sensor needs
service.
⑨ 120V AC 20A 5-20R Outlet: The outlet is capable
of carrying a maximum of 20 amps.
⑩ 120V AC 30A L5-30R Outlet: The outlet is
capable of carrying a maximum of 30 amps.
⑪ 120/240V AC 30A L14-30R Outlet: The outlet is
capable of carrying a maximum of 30 amps.
⑫ 120/240V AC 50A 14-50R Outlet : The outlet is
capable of carrying a maximum of 50 amps.
CONTROL PANEL FEATURES GM12000ED
10 11 12

12
PREPARATIONS
Fuel
1
DANGER
• Fuel is flammable and toxic, please read the Safety Instruction carefully before refueling;
• Do not fuel too full, otherwise fuel will spill after fuel tank is warmed;
• After refueling, confirm that the fuel tank cap has been tightened.
ATTENTION
• After refueling, dry gasoline residue with a clean and soft cloth in time to avoid damaging plastic
enclosure;
• Unleaded gasoline must be used, as leaded gasoline can seriously damage internal parts of the
generator;
Remove the tank cap and add gasoline.
Fuel tank capacity: 10.6 gal (40L)
Oil
2
No oil is filled into this generator when being delivered. Do not start up the generator without filling sufficient
oil.
Please place the generator onto a horizontal plane surface;
1.
Unscrew oil dipstick, Fill in 0.3 gal(1.1L) oil
(SAE 10W/30 oil is recommended, of which
the grade is API standard Type SE or higher);
2.
Don't go over the scale
Tighten the oil dipstick.
3.

13
PREPARATIONS
Pre-use Inspection
3
WARNING
Even if the generator is not in service, its important component may suddenly fails. Before the
generator is started up, if any of following components is unable to work properly, please inspect
and repair carefully.
Tip: The condition of the generator shall be inspected before using every time.
Pre-operation inspection
Project Possible Causes Probable Solutions
Fuel Check fuel level in fuel tank of the generator. Add fuel if necessary.
Oil
Check oil level of the generator. Add oil if necessary.
Check whether there is oil leaking.
Abnormal
conditions
during
operation
Check operating condition of the generator.
If there is any need, please do not hesitate to
consult your dealer.
Battery
Check whether the battery is full. See the “Battery Charging” page.

14
STARTING UP THE GENERATOR
Remove the load from all output ends;
1.
Connect the positive and negative electrodes of the battery;
2.
b. LPG:
1. Connect the LPG hose to the LPG tank;
2. Tighten the other end of the LPG hose to the generator intake;
3. Turn the fuel source switch to LPG.
3.
Turn the choke lever to the "CLOSED" position;
Tip: Don't close the choke when starting the engine in warm state.
5.
Select Boot Mode:
a. Hand Starting: Pull the starting handle to
start the generator.
b. Electric Start: Press the engine switch
upward to the Start position "Start" for 2-3 s.
6.
Turn the choke lever to the "OPEN" position;
7.
1 2 3
a. Gasoline: Turn the fuel source switch to gasoline.
Select the Fuel:
a
b

15
Plug in after started.
8.
STARTING UP THE GENERATOR
COMMON PROBLEMS WITH STARTING THE GENERATOR:
Start the generator to run normally without output ?
(1) Check whether the green light of the GFCI socket is on.
If the green light is not on, press the RESET button after the generator is started
to make the green light on.
Tip: When the generator is not started, the GFCI socket is in the protected state
and the “RESET” button cannot be pressed.
LPG startup is difficult ?
When both gasoline and propane are present in the generator it is recommended to start the generator on
gasoline first, allow the engine to stabilize then switch to propane.
1. Ensure the LPG supply hose is securely attached and Close the LPG valve
completely.
2. Fuel source rocker switch to “GASOLINE”.
3. Follow the startup steps to start the generator.
4. Open the LPG valve completely.
OPEN
CLOSE
(2) Check whether the main breaker switch is set to “ON”.
If the main breaker switch is set to ON and there is no output, press the heat
protection corresponding to the socket and use a multimeter to test whether the
socket has voltage.
ON
ON
ON

16
Unplug the power cord;
1.
Turn off gasoline or LPG.
2.
SHUTTING DOWN THE GENERATOR
5. Fuel source switch to “LPG”.
Electric start and remote start no response ?
1. Check whether the positive and negative electrodes of the battery are correctly connected.
2. Check whether the battery is charged.
Electric start and remote start no response ?
1. Check whether the positive and negative electrodes of the battery are correctly connected.
2. Check whether the battery is charged.

17
USING THE GENERATOR
Service Environment of the Generator
1
• Applicable temperature: -5°C~ 40°C;
• Applicable humidity: below 95%;
• Applicable altitude: regions below 1,500 m (It shall be used by reducing power in regions above 1,000 m).
Standard atmospheric condition
• Ambient temperature Tr: 298k (25°C)
• Relative air humidity Фr: 30%
• Absolute atmospheric pressure Pr: 100kPa
When actual environmental condition is inconsistent with the condition of output power of the generator
set:
• Every 5°C of increase in ambient temperature will reduce the power of generator by about 2%.
• Every 30% of increase in relative humidity of air will reduce the power of generator by about 1.5%.
• Every 300 m rising of ASL will reduce the power the generator by about 4.5%.
Generator Wiring
2
• When the generator is connected to household power source as a backup power supply, the connection shall be
carried out by a professional electrician or a person familiar with electricity.
• After connecting the load to the generator, check carefully whether electrical connection is safe and reliable.
Improper electrical connection may cause generator damage, burning or fire.
• Avoid connecting this generator to commercial power outlet.
• When extending the cable, be sure not to exceed its length.
① 60m cross-section area is 1.5mm²
② 100m cross-section area is 2.5mm²
• The appearance of extension cable shall be protected by a layer of tough and elastic rubber cover (IEC25) or
other substitutes.
OK
OK

18
USING THE GENERATOR
Connection of AC power
WARNING
All electrical equipment shall be disconnected before inserting the plug.
ATTENTION
• Make sure that all electrical equipment, including wires and plugs, are in good condition before
connecting to the generator;
• Make sure that all loads driven by the generator are within rated load range;
• Make sure that load current is within rated current range of rated socket.
Tip: Make sure that the generator set is grounded, and if electrical equipment requires
grounding, the generator set must be grounded.
① Start up the engine;
② Turn energy-saving switch to "ON";
③ Insert the plug into AC outlet;
④ Make sure that AC indicator is lit up;
⑤ Switch on electrical equipment.
Tip: Before increasing engine speed, energy-
saving switch must be switched to "OFF". If the
generator set supplies power to multi loads or
electrical equipment, start from large to small
according to the size of each electrical
equipment.
Generator Grounding
3
① Please use grounding wire with sufficient electrical energy capacity;
② Connect one end of grounding wire reliable to grounding bolt on control panel
of the generator set;
③ Insert grounding body (iron rod with a diameter of 5 ~ 10mm) 200mm below
into the earth and lead it out with conductor;
④ Connect the other end of the grounding wire reliable to the led wire of
grounding body.
In order to prevent any damage to the generator caused by electric shock or improper electrical application, it
is recommended that the generator is grounded with good conductor with insulating sheath.
Tip: How to change the grounding method please refer to the website: https://www.genmaxpower.com/page/faq

19
Battery Charging
4
Attach the red clip of the special charger to the
positive (red) lug of the battery, and the black clip to
the negative (blue) lug of the battery. Be careful not to
connect the positive and negative terminals
incorrectly.
Tip: The charging time is about 30-40 minutes.
The battery storage time is generally about 6 months. If the generator is not used for a long time, the battery
will run out of power. At this time, the battery should be charged. Replace the battery if it is damaged or fails to
charge.
Hand start charging: Start the generator by hand, and the battery will be charged automatically when the
generator runs.
Use an external power source for charging:
WARNING
Do not start the generator while charging with an external power supply. Keep batteries away
from fire sources. Keep the battery in a cool and dry place, away from direct sunlight. Keep batteries
away from children.
ATTENTION
1. Charge properly
Keeping lithium-ion batteries properly charged and discharged can prolong battery life. Maintaining a power
level of 10%-90% in lithium-ion batteries is beneficial for battery protection.
2. Choose the appropriate charging temperature
Lithium battery charging temperature range: 0-45℃.
3. Avoid overcharging
Overcharging of lithium-ion batteries must be avoided during the charging process. Overcharging of lithium-
ion batteries in any form will lead to serious damage to battery performance and even explosion.
USING THE GENERATOR

20
SERVICE AND MAINTENANCE
Good maintenance and service is the best guarantee for safe, economical and zero-failure operation. It also
contributes to environmental protection.
In order to keep the generator in good condition, you must inspect and maintain it regularly. The maintenance
schedule is as follows:
Maintenance cycle
Item
Each
First in 1 month
or 20 hours
Then every three
months or every
50 hours
100 hours per
year or use
Engine oil
Gearbox gear
Oil (if any)
Air cleaner
element
Settling cup (if any)
Spark plug
Spark eliminator
Idle speed
(if any)**
Valve clearance**
Fuel tank and
fuel filter***
Fuel line
Cylinder head,
piston
Displacement < 225cc, every 125 hours; displacement
capacity ≥ 225cc, every 250 hours.
Check-fill
Replace
Replace
Check oil
Inspection
Clean
Replace
Clean
Clean-adjust
Clean
Check-adjust
Check-adjust
Clean
Inspection
Remove
carbon
deposit**
Every two years (Please replace if necessary)
√
√ √
√
√ √
√
√
√
√
√*
√
√
√
√
* heseT items shall be replaced if necessary;
** heT se items shall be maintained by the dealer authorized by the Company, unless the
user has proper tools and maintenance ability.
ATTENTION
• If it often works under high temperature or high load, oil shall be changed every 25 hours;
• If it often works in dusty or harsh environment, air cleaner element shall be cleaned every 10 hours. If
necessary, the air cleaner element shall be replaced every 25 hours;
• It shall be maintained on spot-inspection cycle and time, whichever is earlier;
• If maintenance cycle time has elapsed, perform the maintenance as soon as possible as per the table
above.

21
SERVICE AND MAINTENANCE
WARNING
Please shut down the engine first before performing any maintenance. The engine shall be placed in a
horizontal position. In order to prevent the engine from starting up, separate spark plug cap shall be
separated from spark plug.
Do not use it indoors or use it in a tunnel, cave or other places ventilated poorly. Make sure that work area
is well ventilated. Exhaust gas from the engine contains toxic gases, carbon oxides, and the inhalation can
cause shock, loss of consciousness, and even death.
Spark Plug Inspection
1
Spark plug is an important part of the generator, which must be inspected regularly.
Remove the high voltage assembly;
1.
Insert the screwdriver into the sleeve, to screw it counterclockwise, and then
remove the spark plug;
2.
Check whether there is discoloration, and remove carbon deposits.Check
whether there is little pale to moderate brown on ceramic cores around
center electrode of the spark plug;
3.
Check the model of spark plug and clearance.
Standard spark: GAS 5357
Spark plug gap: 0.65-0.85mm
4.
0.65~0.85mm
Tip: The spark plug clearance is required to be measured by line thickness gauge, which shall be adjusted if
necessary.

22
SERVICE AND MAINTENANCE
Install the spark plugs in reverse order of removal.
Spark plug torque: 22.5±2.5N.m(199±22in-lb)
5.
Tip: If there is no torque wrench when installing the spark plug, a better estimation method is to screw it 1/4-1/2
turns by force after screwing it in place, but the spark plug shall be screwed to specified torque as soon as
possible.
Adjustment of the Carburetor
2
The carburetor is an important components of the engine. The adjustment shall be carried out by a dealer
with professional knowledge, professional data and equipment, to ensure that the adjustment is proper.
Replacement of Oil
3
WARNING
Do not drain the oil immediately after turning off the generator. Oil temperature is very high, when
operating, take care to avoid scalding.
Put the generator on a horizontal surface, start the generator, run it for a few minutes to increase its
temperature, and then turn off the engine;
1.
Unscrew the drain oil bolt;
2.
Place the container and tilt the machine to drain the oil, tighten the drain bolt
after the waste oil is discharged clean;
3.

23
SERVICE AND MAINTENANCE
Refill oil to a proper level, tighten oil dipstick.
4.
Recommended oil: SAE S10W/30
Oil grade: API standard Model SJ or higher
Volume: 0.3 gal(1.1L)
Air Filter
5
Dirty air cleaner may prevent air from flowing into the carburetor. In order to prevent failure of the carburetor,
please maintain air cleaner regularly. If being used in a dusty environment, it shall be maintained frequently.
Remove screws, to remove cover plate of air
cleaner;
1.
Clean foam cleaner element with cleaning solvent and blow it dry, Put a few
drops of oil on the filter element;
2.
ATTENTION
Be sure not to twist the foam cleaner element forcibly to avoid
damage.
Oil Filter
4
It is recommended to clean the oil filter after the first operation of the generator. After that, it will be cleaned
every 50 hours.
Drain the oil from the engine as in the previous oil drain change procedure,
and then remove the oil filter next to it;
1.
1. Clean the impurities inside the filter plug. If the impurities are too much to
clean, use detergent to clean;
2. After cleaning, blow dry with compressed air or air dry naturally and put
back in the original position.
2.

24
SERVICE AND MAINTENANCE
Fuel Filter Screen
6
WARNING
Be sure not to open fuel tank of the generator in a place where smoking or with flame.
1. Remove fuel tank cap and fuel tank filter screen.
2. Clean fuel tank filter screen with gasoline.
3. Wipe filter screen dry, and put it back into fuel
tank.
4. Reassemble fuel tank cap.
Be sure to screw fuel tank cap tight.
ATTENTION
Put foam cleaner element into air cleaner;
Tip: Make sure that the surface of foam cleaner element is in close contact
with air cleaner, and there shall be no gap leaking air. Be sure not to start the
engine before air cleaner is assembled, because it will generate excessive
toxic gas and wear the cylinder;
3.
Reassemble empty air cleaner cap back to original position, and tighten
screws.
4.

25
STORAGE AND TRANSPORT
Generator Storage
1
If it is stored long-term, in order to prevent aging, you shall take some storage measures.
Follow the shutdown steps to shut down the generator.
1.
Open fuel tank cap, to take out fuel filter screen.
Pump all fuel in fuel tank into special fuel tank,
and then reassemble fuel tank cap back.
2.
Start up the engine to burn off fuel in the carburetor, and then shut it down.
3.
Tip: Do not connect any electrical equipment. Running time of the engine depends on remaining fuel in the fuel
tank.
Locate the carburetor to drain the remaining gasoline and place a suitable
container to capture the emitted fuel.
4.
Loosen the carburetor drain screws until you see fuel draining from the
carburetor.
5.
Allow fuel to drain into the container and tighten the drain screws on the
carburetor.
6.
Unscrew oil dipstick, and drain oil in the crankcase off. Fill new oil to upper oil limit, and then assemble
oil dipstick.
7.

26
STORAGE AND TRANSPORT
Gently pull startup handle until you feel resistance, allowing both inlet valve
and exhaust valve to be closed.
8.
Place the generator set in a clean and dry area.
10.
Generator Transport
2
• When the generator set is transported, it shall be ensured that there is no fuel spilling;
• Do not fill excessive fuel into fuel tank;
• Do not run the generator, and avoid direct sunlight;
• Do not transport the generator set on rough road for long time.
Disconnect the battery cable.
9.

27
TROUBLESHOOTING

28
TROUBLESHOOTING

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TECHNICAL PARAMETERS
Item
GM12000ED
Engine Model
Engine Type
Displacement (cc)
Gas Distribution Mode
Cooling Mode
Rated Speed (RPM)
Starting Method
Fuel Tank Volume (gal)
Fuel Type and Grade
Lubricating Oil Capacity (gal)
Lubricating Oil Model
192F/P-2
458
OHV
Forced cooling wind
3600
Recoil start/Electrical start
10.6(40L)
Vehicle-use unleaded gasoline
SAE 10W/40
0.3(1.1L)
Noise dB (at 7m)(25% load)
Rated Power (kW)
Max. Power (kW)
Rated Voltage (V)
Rated Frequency (Hz)
Rated Power Factor
Phase Number
77
9.0(GAS.)/8.0PG)
12.0(GAS.)/9.0(LPG)
120/240
60
1
Single phase
Run Time @ 25% (h)(GAS.)
16
Overall Dimension (in.)
Net Weight (lb.)
27.9x21.1x24.6
218.3
Stroke x Bore (mm)
92x69
4-stroke
Fuel Consumption Rate
(25% load)(L/h)
THD
Fuel Consumption Rate
(100% load)(L/h)
2.5
5
≤23%
LPG Consumption Rate
(25% load)(kg/h)
LPG Consumption Rate
(100% load)(kg/h)
1.1
2.1
Valve Clearance
Input valve:0.10~0.15 mm, Output valve:0.15~0.20 mm

30
CIRCUIT DIAGRAM
GM12000ED SCHEMATICS

31
R
CHOOSING
A GENERATOR
1

32
In production management, based on orderly, efficient, scientific principles. trying to do as
better as possible in product design, development, production, inspection, etc. to make our
production can keep orderly. And will continue to make improvement to make sure that
keep the competitiveness.
Welcome friends at home and abroad to visit and guide, work together to create
brilliant.
Phone
866-960-2920
service@genmaxpower.com
Http://www.genmaxpower.com/
Caojie Industrial Park,Hechuan District,Chongqing
E-mail
You
Tube
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+
R
6800.560.GEM.02.02 V3
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