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]1-847-429-9263 (M-F 8AM-5PM CST)
For replacement parts and the most up-to-date instruction manuals, visit WENPRODUCTS.COM
20V MAX BRUSHLESS
CHAINSAW
Instruction Manual
MODEL 20754, 20754BT
CONTENTS
WELCOME 3
Introduction ......................................................................................................3
Specifications ....................................................................................................3
SAFETY 4
General Safety Rules .........................................................................................4
Chainsaw Safety Warnings ................................................................................6
Electrical Information (Charger) ........................................................................8
Battery & Charger Safety Warnings ..................................................................9
BEFORE OPERATING 11
Unpacking & Packing List ...............................................................................11
Know Your Chainsaw ......................................................................................12
Assembly & Adjustments ................................................................................13
OPERATION & MAINTENANCE 16
Operation ........................................................................................................16
Maintenance ....................................................................................................21
Exploded View & Parts List .............................................................................22
Warranty Statement ........................................................................................24
WEN plans to continue to add more items to our 20V line. For an up-to-date list of the 20V cordless tools compatible
with the included battery and charger, visit wenproducts.com.
2
To purchase accessories and replacement parts for your tool, visit WENPRODUCTS.COM
20V 4.0Ah Max Battery (Model 20204, 20204B, and 20204D)
20V 2A Charger (Model 20200C)
20V 5.0Ah Max Battery (Model 20205)
20V 5A Quick Charger (Model 20201Q)
20V 2.0Ah Max Battery (Model 20202, 20202B, 20202D)
20V 2A Dual Port Charger (Model 20200D)
20V 8.0Ah Max Battery (Model 20208)
Replacement Saw Chain (Part 20754-056)
Replacement Guide Bar (Part 20754-058)
SPECIFICATIONS
INTRODUCTION
Thanks for purchasing the WEN Chainsaw. We know you are excited to put your tool to work, but first, please take
a moment to read through the manual. Safe operation of this tool requires that you read and understand this op-
erator’s manual and all the labels affixed to the tool. This manual provides information regarding potential safety
concerns, as well as helpful assembly and operating instructions for your tool.
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 our customer service at 1-847-429-9263.
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.
Indicates danger, warning, or caution. The safety symbols and the explanations with them deserve your
careful attention and understanding. Always follow the safety precautions to reduce the risk of fire, electric shock
or personal injury. However, please note that these instructions and warnings are not substitutes for proper ac-
cident prevention measures.
Model Number 20754, 20754BT
Included Batteries* 4.0Ah Batteries (Model 20204)*
Included Charger* Dual Port Charger, 20V, 4A DC (Model 20224D)*
Guide Bar 14 in.
Saw Chain 14 in., 53 Drive Links
Maximum Cutting Capacity 13 in. (33 cm)
No-Load Speed 50 ft/sec
Chain Gauge 0.05 in.
Chain Pitch 3/8 in.
Sharpening File Size 0.2 in. (4mm)
Oil Tank Capacity 7.4 fl. oz. (220ml)
Oil Type Standard Bar and Chain Oil
Product Weight 7.1 lbs (Bare Tool)
Product Dimensions 31.1 in. x 8.5 in. x 8.7 in.
Battery Models** All WEN 20V MAX Batteries**
Charger Models All WEN 20V MAX Chargers
**NOTE: Some tools may not be compatible with WEN 20V MAX 1.5Ah Batteries, model 49120B. Contact WEN
customer service at 1-847-429-9263, M-F with questions.
*NOTE: Battery and charger only included with model 20754. 20754BT does not include a battery or charger.
3
GENERAL SAFETY RULES
WORK AREA SAFETY
1. Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
2. Do not operate power tools in explosive atmo-
spheres, such as in the presence of flammable liquids,
gases or dust. Power tools create sparks which may ig-
nite the dust or fumes.
3. Keep children and bystanders away while operating
a power tool. Distractions can cause you to lose control.
ELECTRICAL SAFETY
1. Power tool plugs must match the outlet. Never mod-
ify the plug in any way. Do not use any adapter plugs
with earthed (grounded) power tools. Unmodified plugs
and matching outlets will reduce risk of electric shock.
2. Avoid body contact with earthed or grounded surfac-
es such as pipes, radiators, ranges and refrigerators.
There is an increased risk of electric shock if your body
is earthed or grounded.
3. Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of elec-
tric shock.
4. Do not abuse the cord. Never use the cord for car-
rying, pulling or unplugging the power tool. Keep cord
away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electric
shock.
5. When operating a power tool outdoors, use an ex-
tension cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of electric
shock.
6. If operating a power tool in a damp location is un-
avoidable, use a ground fault circuit interrupter (GFCI)
protected supply. Use of a GFCI reduces the risk of elec-
tric shock.
PERSONAL SAFETY
1. Stay alert, watch what you are doing and use com-
mon sense when operating a power tool. Do not use a
power tool while you are tired or under the influence
of drugs, alcohol or medication. A moment of inatten-
tion while operating power tools may result in serious
personal injury.
2. Use personal protective equipment. Always wear
eye protection. Protective equipment such as a respira-
tory mask, non-skid safety shoes and hearing protection
used for appropriate conditions will reduce the risk of
personal injury.
3. Prevent unintentional starting. Ensure the switch is
in the off-position before connecting to power source
and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or
energizing power tools that have the switch on invites
accidents.
4. Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personal
injury.
5. Do not overreach. Keep proper footing and balance
at all times. This enables better control of the power
tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or jew-
elry. Keep your hair and clothing away from moving
parts. Loose clothes, jewelry or long hair can be caught
in moving parts.
Safety is a combination of common sense, staying alert and knowing how your item works. The term “power tool”
in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may
result in electric shock, fire and/or serious injury.
4
GENERAL SAFETY RULES
7. If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
connected and properly used. Use of dust collection
can reduce dust-related hazards.
POWER TOOL USE AND CARE
1. Do not force the power tool. Use the correct power
tool for your application. The correct power tool will
do the job better and safer at the rate for which it was
designed.
2. Do not use the power tool if the switch does not turn
it on and off. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
3. Disconnect the plug from the power source and/or
the battery pack from the power tool before making
any adjustments, changing accessories, or storing
power tools. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
4. Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power
tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained us-
ers.
5. Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and any
other condition that may affect the power tool’s opera-
tion. If damaged, have the power tool repaired before
use. Many accidents are caused by poorly maintained
power tools.
6. Keep cutting tools sharp and clean. Properly main-
tained cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
7. Use the power tool, accessories and tool bits, etc.
in accordance with these instructions, taking into ac-
count the working conditions and the work to be per-
formed. Use of the power tool for operations different
from those intended could result in a hazardous situa-
tion.
8. Use clamps to secure your workpiece to a stable
surface. Holding a workpiece by hand or using your
body to support it may lead to loss of control.
9. KEEP GUARDS IN PLACE and in working order.
SERVICE
1. Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure that the safety of the power tool is main-
tained.
CALIFORNIA PROPOSITION 65 WARNING
Some dust created by power sanding, sawing, grinding,
drilling, and other construction activities may contain
chemicals, including lead, known to the State of Califor-
nia to cause cancer, birth defects, or other reproductive
harm. Wash hands after handling. Some examples of
these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks, cement, and other
masonry products.
• Arsenic and chromium from chemically treated
lumber.
Your risk from these exposures varies depending on
how often you do this type of work. To reduce your ex-
posure to these chemicals, work in a well-ventilated area
with approved safety equipment such as dust masks
specially designed to filter out microscopic particles.
5
Safety is a combination of common sense, staying alert and knowing how your item works. The term “power tool”
in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
SAVE THESE SAFETY INSTRUCTIONS.
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may
result in electric shock, fire and/or serious injury.
6
CHAINSAW SAFETY WARNINGS
WARNING! Do not operate the power tool until you have read and understood the following instructions and
the warning labels.
CHAINSAW SAFETY
1. TOOL PURPOSE. This chainsaw is designed for saw-
ing wood. Sawing other types of materials may result
in serious injuries, machine damage and voiding of the
warranty.
2. Keep all parts of the body away from the saw chain
when the chainsaw is operating. Before you start the
chainsaw, make sure the saw chain is not contacting
anything. A moment of inattention while operating the
chainsaw may cause entanglement of your clothing or
body with the saw chain.
3. Always hold the chainsaw with your right hand on
the rear handle and your left hand on the front handle.
Holding the chainsaw in the opposite manner can result
in an increased risk of serious injury to the user and
should never be done.
4. Only hold the power tool by the insulated gripping
surfaces to avoid electric shock in case the saw chain
contacts hidden wiring. Saw chains contacting a live
wire may make exposed metal parts of the power tool
live and can give the operator an electric shock.
5. Wear safety glasses and hearing protection. Pro-
tective equipment for hands, legs, head and feet is also
highly recommended. Protective clothing greatly reduc-
es the risk of personal injury from loose debris or ac-
cidental contact with the saw chain.
6. Do not operate the chainsaw while standing in a
tree. Only operate the chainsaw from a firm, level sur-
face fixed on the ground.
7. Always keep proper footing during operation. Slip-
pery or unstable surfaces such as ladders may cause a
loss of balance or control.
8. When cutting a limb that is under tension, be alert
for spring back. When tension from wood fibers and
branches is suddenly released, the limb may fly in un-
predictable ways, possibly resulting in kickback and in-
jury to the user.
9. Use extreme caution when cutting brush and sap-
lings. The slender material may catch the saw chain,
whipping towards you or pulling you off balance.
10. Carry the chainsaw by the handle with the chain-
saw switched off, the battery disconnected, and the
chain away from your body. When transporting or stor-
ing the chainsaw, always protect the blade with a scab-
bard (blade cover).
11. Routinely lubricate, adjust chain tension, and
check chain for dullness. Follow these instructions
closely to minimize kickback and maximize the lifespan
of the tool.
12. Keep handles dry, clean and free of oil and grease.
Slippery handles increase the chances of losing control.
13. Before beginning each day, check the chain guard
for proper operation. It should spring back over the bar
and chain, but not contact the chain. If the guard does
not operate properly, do not operate the chainsaw until
the chain guard is repaired.
14. Do not disable the chain guard. Doing so signifi-
cantly increases the risk of injury.
15. Only use this chainsaw to cut wood. Do not cut
plastic, masonry, or other non-wood materials. Do not
use this chainsaw for anything other than its intended
purpose. Let the saw work at its own pace.
7
CHAINSAW SAFETY WARNINGS
WARNING! Do not operate the power tool until you have read and understood the following instructions and
the warning labels.
REDUCING KICKBACK
Kickback can occur when the tip of the guide bar touches
an object or when the wood closes in and pinches the
saw chain inside of the cut. Tip contact can kick the guide
bar up and back towards the operator. Pinching the saw
chain along the top of the guide bar can push the bar
rapidly towards the operator. Either of these reactions
may cause a loss in control of the chainsaw, increasing
the chances of serious personal injury. Do not rely on the
safety devices built into the saw. Chainsaw users should
take as many precautions as possible to minimize on-
site accidents. Kickback is the result of tool misuse and/
or incorrect operating procedures. These conditions can
be minimized with the following steps:
1. Maintain a firm grip, with thumbs and fingers encir-
cling the chainsaw handles. Both hands should be on
the saw with your body and arms in a position to resist
kickback forces. Kickback forces can be controlled by
the operator, if proper precautions are taken. Do not let
go of the chainsaw.
2. Do not overreach and do not cut above shoulder
height. This helps prevent unintended tip contact and
enables better control of the chainsaw in unexpected
situations.
3. Only use replacement bars and chains specified by
WEN. Incorrect replacement bars and chains may cause
chain breakage and/or kickback.
4. Follow the manufacturer’s sharpening and main-
tenance instructions for the chainsaw. Decreasing the
depth gauge height can lead to increased kickback.
These safety instructions can’t possibly warn of every scenario that may arise with this tool,
always make sure to stay alert and use common sense during operation.
ELECTRICAL INFORMATION (CHARGER)
AMPERAGE
REQUIRED GAUGE FOR EXTENSION CORDS
25 ft. 50 ft. 100 ft. 150 ft.
4A 18 gauge 16 gauge 16 gauge 14 gauge
IMPORTANT: Servicing a double-insulated product requires extreme care and knowledge of the system, and
should be done only by qualified service personnel using identical replacement parts. Always use original factory
replacement parts when servicing.
1. Polarized Plugs. To reduce the risk of electric shock, this equipment has a polarized plug (one blade is wider
than the other). This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse
the plug. If it still does not fit, contact a qualified electrician to install a proper outlet. Do not modify the machine
plug or the extension cord in any way.
2. Ground fault circuit interrupter protection (GFCI) should be provided on the circuit or outlet used for this power
tool to reduce the risk of electric shock.
3. Service and repair. To avoid danger, electrical appliances must only be repaired by a qualified service technician
using original replacement parts.
GUIDELINES AND RECOMMENDATIONS FOR EXTENSION CORDS
When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An
undersized cord will cause a drop in line voltage, resulting in loss of power and overheating. The table below shows
the correct size to be used according to cord length and ampere rating. When in doubt, use a heavier cord. The
smaller the gauge number, the heavier the cord.
DOUBLE-INSULATED CHARGER
The charger’s electrical system is double-insulated where two systems of insulation are provided. This
eliminates the need for the usual three-wire grounded power cord. Double-insulated tools do not need
to be grounded, nor should a means for grounding be added to the product. All exposed metal parts are
isolated from the internal metal components with protecting insulation.
1. Examine extension cord before use. Make sure your extension cord is properly wired and in good condition.
Always replace a damaged extension cord or have it repaired by a qualified person before using it.
2. Do not abuse extension cord. Do not pull on cord to disconnect from receptacle; always disconnect by pulling on
plug. Disconnect the extension cord from the receptacle before disconnecting the product from the extension cord.
Protect your extension cords from sharp objects, excessive heat and damp/wet areas.
3. Use a separate electrical circuit for your tool. This circuit must not be less than a 12-gauge wire and should be
protected with a 15A time-delayed fuse. Before connecting the motor to the power line, make sure the switch is in
the OFF position and the electric current is rated the same as the current stamped on the motor nameplate. Running
at a lower voltage will damage the motor.
8
9
• Avoid dangerous environments – Do not charge the
battery pack in rain, snow or in damp or wet locations.
Do not use the battery pack or charger in the presence
of explosive atmospheres (gaseous fumes, dust or flam-
mable materials) because sparks may be generated when
inserting or removing the battery pack, which could lead
to a fire.
• Charge in a well-ventilated area – Do not block the
charger vents. Keep them clear to allow for proper ven-
tilation. Do not allow smoking or open flames near a
charging battery pack. Vented gases may explode.
NOTE: The safe temperature range for the battery charg-
ing is 41°F to 104°F. Do not charge the battery outside in
freezing weather; charge it at room temperature.
• Maintain charger cord – When unplugging the char-
ger, pull the plug, not the cord, from the receptacle to
reduce the risk of damage to the electrical plug and cord.
Never carry the charger by its cord or yank it by the cord
to disconnect it from the receptacle. Keep the cord away
from heat, oil and sharp edges. Make sure the cord will
not be stepped on, tripped over or subjected to dam-
age or stress when the charger is in use. Do not use the
charger with a damaged cord or plug. Replace a dam-
aged charger immediately.
• Do not use an extension cord unless it is absolutely
necessary – Using the wrong, damaged or improperly
wired extension cord poses a risk of fire and electric
shock. If an extension cord must be used, plug the char-
ger into a properly wired 16 gauge or larger extension
cord with the female plug matching the male plug on the
charger. Make sure that the extension cord is in good
electrical condition.
• Charger is rated for 120 volt AC only – The charger
must be plugged into an appropriate receptacle.
• Use only recommended attachments – Use of an at-
tachment not recommended or sold by WEN Products
may result in risk of fire, electric shock or personal in-
jury.
• Unplug charger when not in use – Make sure to re-
move battery packs from unplugged chargers.
• Do not burn or incinerate battery packs – Battery
packs may explode, causing personal injury or dam-
age. Toxic fumes and materials are created when battery
packs are burned.
• Do not crush, drop or damage battery packs – Do not
use the battery pack or charger if they have sustained a
sharp blow, been dropped, run over or have been dam-
aged in any way (i.e. pierced with a nail, hit with a ham-
mer, stepped on, etc.).
• Do not disassemble – Incorrect reassembly may pose
a serious risk of electric shock, fire or exposure to toxic
battery chemicals. If the battery or charger are damaged,
call WEN customer service at 1-847-429-9263 for as-
sistance.
• Battery chemicals cause serious burns – Never let a
damaged battery pack contact the skin, eyes or mouth.
If a damaged battery pack leaks battery chemicals, use
rubber or neoprene gloves to safely dispose of it. If skin
is exposed to battery fluids, wash the affected area with
soap and water and rinse with vinegar. If eyes are ex-
posed to battery chemicals, immediately flush with wa-
ter for 20 minutes and seek medical attention. Remove
and dispose of contaminated clothing.
• Store your battery pack and charger in a cool, dry
place – Do not store the battery pack or charger where
temperatures may exceed 104 °F, such as in direct sun-
light or inside a vehicle or metal building during the
summer.
• Do not short circuit – A battery pack will short circuit if
a metal object makes a connection between the positive
and negative contacts on the battery pack. Do not place
a battery pack near anything that may cause a short cir-
cuit, such as paper clips, coins, keys, screws, nails and
other metallic objects. A short-circuited battery pack
poses a risk of fire and severe personal injury.
BATTERY & CHARGER SAFETY WARNINGS
Despite all of the safety precautions, caution must always be taken when handling batteries. The following
points must be obeyed at all times to ensure safe use. Safe use can only be guaranteed if undamaged cells are
used. Incorrect handling of the battery pack can cause cell damage.
WARNING! To reduce the risk of electric shock,
always unplug the charger before performing any
cleaning or maintenance. Do not allow water to
flow into the charger. Use a Ground Fault Circuit
Interrupter (GFCI) to reduce shock hazards.
10
BATTERY & CHARGER SAFETY WARNINGS
ABOUT THE BATTERY
1. The battery pack has to be charged completely before you use the tool for the first time.
2. For optimum battery performance, avoid low discharge cycles by charging the battery pack frequently.
3. Lithium-ion batteries are subject to a natural aging process. The battery pack must be replaced at the latest when
its capacity falls to just 80% of its capacity when new. Weakened cells in an aged battery pack are no longer capable
of meeting the high power requirements needed for the proper operation of your tool, and therefore pose a safety
risk.
4. Do not throw battery packs into an open fire as this poses a risk of explosion. Do not ignite the battery pack or
expose it to fire.
5. Do not exhaustively discharge batteries. Exhaustive discharge will damage the battery cells. The most common
cause of exhaustive discharge is lengthy storage or non-use of partially discharged batteries. Stop working as soon
as the performance of the battery falls noticeably or the electronic protection system triggers. Place the battery pack
in storage only after it has been fully charged.
6. Protect batteries and the tool from overloads. Overloads will quickly result in overheating and cell damage inside
the battery housing even if this overheating is not apparent externally.
7. Avoid damage and shocks. Immediately replace batteries that have been dropped from a height of more than
one meter or those that have been exposed to violent shocks, even if the housing of the battery pack appears to be
undamaged. The battery cells inside the battery may have suffered serious damage. In such instances, please read
the waste disposal information for proper battery disposal.
8. If the battery pack suffers overloading and overheating, the integrated protective cutoff will switch off the equip-
ment for safety reasons.
9. Use only original battery packs. The use of other batteries poses a fire risk and may result in injuries or an explo-
sion.
ABOUT THE CHARGER
Protect battery charger and cord from damage. Keep the charger and its cord away from heat, oil and sharp edges.
Electrical plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with ground-
ed appliances. Unmodified plugs and matching outlets will reduce the risk of electric shock.
Keep the battery charger, battery pack(s), and the cordless tool out of the reach of children.
Do not use the supplied battery charger to charge other cordless tools.
During periods of heavy use, the battery pack will become warm. Allow the battery pack to cool to room temperature
before inserting it into the charger to recharge.
Do not overcharge batteries. Do not exceed the maximum charging times. These charging times only apply to dis-
charged batteries. Frequent insertion of a charged or partially charged battery pack will result in overcharging and
cell damage. Do not leave battery in the charger for days on end.
Never use or charge a battery if you suspect that it has been more than 12 months since last time they were charged.
There is a high probability that the battery pack has already suffered dangerous damage (exhaustive discharge).
Do not use batteries that have been exposed to heat during the charging process, as the battery cells may have suf-
fered dangerous damage.
Do not use batteries that have suffered curvature or deformation during the charging process or those that exhibit
other atypical symptoms (gassing, hissing, cracking, etc.)
UNPACKING & PACKING LIST
UNPACKING
With the help of a friend or trustworthy foe, such as one of your in-laws, carefully remove the chainsaw 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 everything 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 1-847-429-9263 (M-F 8-5 CST),
or email [email protected].
PACKING LIST
*NOTE: Battery and charger only included with model 20754.
20754BT does not include a battery or charger.
11
Description Qty.
Chainsaw 1
Protective Cover 1
Guide Bar 1
Saw Chain 1
Dual Port Charger 1
4.0 Ah Batteries 2
KNOW YOUR CHAINSAW
TOOL PURPOSE
Easily break down trees and branches with your WEN 20V Chainsaw. Refer to the following diagrams to become
familiarized with all the parts and controls of your chainsaw. The components will be referred to later in the manual
for assembly and operation instructions.
12
*NOTE: Battery and charger only included with model 20754. 20754BT does not include a battery or charger.
*4.0Ah BatteryRear Handle
Front Handle
Handle Guard /
Chain Kickback Brake
Guide Bar Saw ChainPower Trigger
Cover Lock Knob /
Chain Tensioning Knob
Trigger Lock
Oil Tank Cap
*4.0Ah Battery
Power
Button
Battery Power
Status
13
WARNING! To avoid injury from accidental startups, be sure that the tool is switched OFF and the battery is
removed from the tool before inspecting the unit, making adjustments, or changing accessories.
ASSEMBLY & ADJUSTMENTS
CHARGING THE BATTERY PACKS
The 20V battery packs for this tool are supplied in a low charge condition to prevent possible problems, and must
be charged completely before you use the tool for the first time.
NOTE: The battery packs and charger are not included with model 20754BT.
1. Connect the charger to a 120V, 60Hz AC outlet. The green lights on the charger will illuminate, indicating that the
charger is powered.
2. Slide the batteries all the way into the charger ports until they click. The red light on the corresponding charger
port will illuminate, indicating that the batteries are charging.
Charging Indication:
• Solid Green: Ready to Charge
• Solid Red: Charging
• Solid Green: Charged
NOTE: You may charge one or two batteries at the same time, in any capacity combination (2Ah, 4Ah, etc.). If charg-
ing one battery, the maximum charging current is 4A. If charging two batteries, the maximum charging current is
2A per battery.
3. When the batteries are charged, the red light will turn OFF and the green light will turn ON. Remove the batteries
from the charger and unplug the charger from the power supply.
NOTE: Batteries will not reach full charge the first time they are charged. Allow several cycles for the batteries to fully
charge. The battery packs may become warm while charging; this is normal. If the batteries are hot after continuous
use in the tool, allow them to cool to room temperature before charging. This will prolong the life of your batteries.
The battery packs are equipped with four LED battery life indication lights. Press and hold the power button on the
front or rear of the battery to check the battery’s charge status.
Battery Life Indication:
• Four Lights: The battery is fully charged.
• Three Lights: The battery is 75% charged.
• Two Lights: The battery is 50% charged.
• One Light: The battery is almost out of power and needs to be charged.
INSERTING AND REMOVING THE BATTERIES
NOTE: For best results, we recommend using at least 4Ah batteries with this tool.
1. To install the batteries, slide the battery packs into the battery ports. Make sure the release latch on the rear side
of the battery packs snap into place and the batteries are secure before beginning operation.
2. To remove the battery packs, press the battery release latch on the front of the battery and pull the battery packs
out.
NOTE: This tool requires two charged battery packs to operate. It will not run if only one battery is installed, or if
any battery is drained.
WARNING! To avoid injury from accidental startups, be sure that the tool is switched OFF and the batteries
are removed from the tool before inspecting the unit, making adjustments, or changing accessories.
FILLING THE AUTO OIL SYSTEM
This chainsaw features an auto-oiling system to keep the
chain and guide bar properly lubricated. The oil level indica-
tor (Fig. 1 - 1) shows the remaining oil in the chainsaw. If the
oil level decreases to below one quarter capacity, refill it with
the proper bar and chain oil. To fill the oil reservoir:
1. Remove the oil cap (Fig. 1 - 2). Fill the reservoir with bar
and chain oil (not included) until the oil level has reached full
capacity.
2. Put the oil cap back on. Make sure to check the oil level
after every 10 minutes of use. Turn the chainsaw OFF and
remove the batteries before checking the oil level or filling
the oil reservoir.
NOTE: Drain the saw of oil after each use to reduce the
amount of oil that leaks from the saw. Some oil leakage is
normal.
INSTALLING THE GUIDE BAR & CHAIN
1. Turn the cover lock knob (Fig. 2 - 1) counterclockwise to
remove the guide bar cover (Fig. 2 - 2).
2. Align the slot in the guide bar with the bolt (Fig. 3 - 1) at
the base of the saw as shown in Fig. 3.
3. Place the saw chain around the sprocket (Fig. 3 - 2) and
the nose of the guide bar. Make sure that the direction of the
saw chain matches the direction indicated on the guide bar.
4. Align the hole in the back of the guide bar cover with the
bolt at the base of the saw and reinstall the cover.
5. Turn the cover lock knob (Fig. 2 - 1) clockwise to tension
the saw chain and to lock the guide bar cover (Fig. 2 - 2).
Fig. 1
ASSEMBLY & ADJUSTMENTS
14
2
1
Fig. 2
2
1
Fig. 3
1
2
ASSEMBLY & ADJUSTMENTS
15
NOTE: The saw chain must be tensioned properly in order
to ensure safe operation. The chain tension is optimal if
the saw chain can be lifted 1/8 inch (3mm) from the cen-
ter of the guide bar. Since the saw chain heats up during
operation, its length can therefore fluctuate. Check the
chain tension every 10 minutes of operation and adjust
as necessary, particularly for new saw chains. Slacken
the saw chain after the work is completed since it short-
ens when cooling down. In doing so, you can elongate
the chain’s life and prevent damage.
1. Check the chain tension by pulling the saw chain away
from the guide bar. A properly tensioned chain should have
roughly 1/8 inch (3mm) of distance between itself and the
bar guide (Fig. 3).
2. If adjustments are needed, turn the blade tension knob
(Fig. 4 - 1) clockwise until the chain is properly tensioned.
DO NOT over-tension the chain: this will lead to excessive
wear and reduces the life of both the bar and chain.
Fig. 3
Fig. 4
1/8"
(3mm)
WARNING! To avoid injury from accidental startups, be sure that the tool is switched OFF and the batteries
are removed from the tool before inspecting the unit, making adjustments, or changing accessories.
1
16
OPERATION
PREPARATION
Before each use, check the following items to ensure safe operation.
CHAINSAW: Before beginning work, inspect the chainsaw for damage to the housing, the saw chain, and the guide
bar. Never use an obviously damaged machine.
CHAIN OIL: Check the fill level of the oil tank. Also check whether there is sufficient oil available while working. In
order to prevent damage to the chainsaw, never operate the saw if there is no oil, or if the oil level has dropped
below the minimum oil level mark. On average, one tank of oil is sufficient for approximately 10 minutes of cutting
operation (depending on the duration of pauses, chain sharpness, wood species, etc.).
SAW CHAIN: Check the tension of the chain and the condition of the cutting links. The sharper the saw chain is,
the easier and more manageable operations will be. The same applies to chain tension. Check the tension every 10
minutes of operation to maximize safety. New saw chains in particular are subject to changes due to the heat created
by operation. Never allow the saw chain to contact dirt or soil.
PROTECTIVE CLOTHING: Make absolutely sure to wear the appropriate close-fitting protective clothing such as
protective pants, gloves and safety shoes. Wear a safety helmet with integrated hearing protection and a face guard
to provide protection against falling and recoiling branches.
SAFETY WARNINGS
1. In order to maximize safety, do not operate the saw above shoulder height; pole saws are more suitable for that
type of work. Your friends at WEN Products offer several pole saw models, available for purchase at
wenproducts.com.
2. Never stand below a branch that is being sawed.
3. Exercise caution when sawing branches under tension or branches that are splintering.
4. Make sure to safeguard against the risk of injury from falling branches and flying wood projectiles.
5. If the machine is operating, keep people and animals away from the area.
6. The machine is not protected against electric shock when coming into contact with high-voltage lines. Maintain a
minimum clearance of 30 feet from current-carrying power lines to avoid life-threatening electric shock.
7. When working on an incline, always stand above or to the side of the branch being sawed.
8. Allow the chain to cut for you. Keep the saw running at full speed for the entire duration of the cut.
WARNING! It is recommended that first-time chainsaw users should practice cutting logs on a saw-horse
or cradle.
17
OPERATION
PREVENTING KICKBACK
The term kickback refers to when the saw suddenly jumps up and back. This is usually caused by the workpiece
coming into contact with the guide bar tip or the clamping of the saw chain.
A kickback generates an abrupt powerful force. The saw usually reacts in an uncontrolled manner, creating the pos-
sibility of injury to the user.
The danger of a kickback is greatest when attempting to cut near or with the guide bar tip. Always apply the saw as
flatly as possible in order avoid a loss of control during operation.
Fig. 6
Fig. 8
1
BRAKE OFF BRAKE ON
TEST THE KICKBACK BRAKE
The kickback brake is a safety mechanism that is activated by
the front hand guard (Fig. 6 - 1). The chain should stop im-
mediately when kickback occurs. The kickback brake func-
tion should be tested before each use.
To test the kickback brake:
1. Push the front hand guard forward and try to start the
chain. The chain should not start. If the chain does start, the
brake is not working and must be repaired.
2. To deactivate the kickback brake, pull the hand guard
backwards. The chain should now start when the chainsaw
is turned ON. The chain should also stop immediately when
the hand guard is pushed forward while the chain is running.
WARNING! Do not rely on the kickback brake to re-
duce the possibility of injury due to kickback. Read pre-
vention instructions above and on page 7 of this manual.
POWERING THE CHAINSAW ON & OFF
To turn the chainsaw ON: Press the power button (Fig. 7 - 1)
to power ON the chainsaw. The power indicator light (Fig.
7 - 2) will turn ON. Press the safety button (Fig. 8 - 1) and
then squeeze the power trigger (Fig. 8 - 2). After the tool has
started, you can release the safety button without turning the
tool off.
To turn the chainsaw OFF: Release the power trigger. Once
you have completed your sawing operation, press the power
button to power OFF the chainsaw. Remove the batteries
from the chainsaw when it is not in use. If the power indica-
tor light is ON when the batteries are removed, you will hear
two beeps as you remove the batteries. This is normal.
NOTE: The chainsaw will power OFF automatically after 60
seconds of inactivity.
1
2
Fig. 7
2
1
18
50mm50mm
OPERATION
FELLING A TREE
When bucking and felling operations are being performed by two
or more people at the same time, the felling operations should
be separated from the bucking operation by a distance of at least
twice the height of the tree being felled. Trees should not be felled
in a manner that would endanger any person, strike any utility
line or cause any property damage. If the tree does make contact
with any utility line, the company should be notified immediately.
The chain saw operator should keep on the uphill side of the ter-
rain as the tree is likely to roll or slide downhill after it is felled.
An escape path should be planned and cleared as necessary be-
fore cuts are started. The escape path should extend back and
diagonally to the rear of the expected line of fall (Fig. 9).
Before felling is started, consider the natural lean of the tree, the
location of larger branches and the wind direction to judge which
way the tree will fall. Remove dirt, stones, loose bark, nails, sta-
ples and wire from the tree.
Make the notch 1/3 the diameter of the tree, perpendicular to the
direction of fall (Fig. 10). Make the lower horizontal notching cut
first. This will help to avoid pinching either the saw chain or the
guide bar when the second notch is being made.
FELLING BACK A CUT
Make the felling back cut at least 2 inches (50mm) higher than
the horizontal notching cut (Fig. 10). Keep the felling back cut
parallel to the horizontal notching cut. Make the felling back cut
so enough wood is left to act as a hinge. The hinge wood keeps
the tree from twisting and falling in the wrong direction. Do not
cut through the hinge.
As the felling gets close to the hinge, the tree should begin to
fall. If there is any chance that the tree may not fall in desired
direction or it may rock back and bind the saw chain, stop cutting
before the felling back cut is complete and use wedges of wood,
plastic or aluminum to open the cut and drop the tree along the
desired line of fall.
When the tree begins to fall remove the chainsaw from the cut,
stop the motor, put the chain saw down, then use the retreat
path planned. Be alert for overhead limbs falling and watch your
footing.
Fig. 9
Fig. 10
19
OPERATION
BUCKING A LOG
Bucking is cutting a log into lengths. It is important to make sure
your footing is firm and your weight is evenly distributed on both
feet. When possible, the log should be raised and supported by
the use of limbs, logs or chocks. Follow these simple directions
for easy cutting.
When the log is supported along its entire length (Fig. 11), it is
cut from the top (overbuck).
When the log is supported on one end (Fig. 12), cut 1/3 the di-
ameter from the underside (underbuck). Then make the finished
cut by overbucking to meet the first cut.
When the log is supported on both ends (Fig. 13), cut 1/3 the
diameter from the top (overbuck). Then make the finished cut by
underbucking the lower 2/3 to meet the first cut.
When bucking on a slope always stand on the uphill side of the
log. When cutting through, to maintain complete control, release
the cutting pressure near the end of the cut without relaxing your
grip on the chain saw handles. Don’t let the chain contact the
ground. After completing the cut, wait for the saw chain to stop
before you move the chain saw. Always stop the motor before
moving from tree to tree.
NOTE: Never allow the saw chain to contact dirt or soil, doing
so will severely dull the cutting links and shorten the life of the
chain.
Fig. 11
Fig. 12
Fig. 13
20
OPERATION
LIMBING A TREE
Limbing is removing the branches from a fallen tree. When limb-
ing leave larger lower limbs to support the log off the ground.
Remove the small limbs in one cut (Fig. 14). Branches under
tension should be cut from the bottom up to avoid binding the
chain saw.
SAWING TECHNIQUES
Saw off the lower branches on the tree first. By doing so, it is
easier for the cut branches to fall to the ground.
At the end of the cut, the weight of the saw suddenly increases
for the user since it is no longer being supported by a branch.
There is a risk of losing control of the saw, so make sure to stay
alert during the entire sawing operation.
Only pull the saw out of a cut while the saw is running. By doing
so, you prevent the chain from jamming in the wood.
Do not saw with the tip of the guide bar. Do not saw into the
branch formations (where the tree branches outwards). This will
impede the tree’s ability to heal.
For sawing off smaller branches, place the stop face of the saw
on the branch. This prevents unwanted movements of the saw at
the beginning of the cut. While applying light pressure, guide the
saw through the branch from top to bottom.
For sawing off larger branches, first make a relief cut. Saw
through 1/3 of the branch diameter from the bottom to top us-
ing the top side of the guide bar. Then saw from top to bottom
for the other 2/3 using the bottom side of the guide bar. Saw off
longer branches in sections in order to maintain control over the
location of impact.
Fig. 14
MAINTENANCE
ROUTINE INSPECTION
Before each use, inspect the general condition of the
tool. If any of these following conditions exist, do not use
until parts are replaced or the tool is properly repaired.
Check for:
• Loose hardware or improper mounting
• Misalignment or binding of moving parts
• Damaged battery or battery terminal
• Cracked or broken parts
• Any other condition that may affect its safe operation
CLEANING & STORAGE
1. Brush or blow dust and debris out of the air vents us-
ing compressed air or a vacuum. Keep the air vents free
of obstructions, sawdust, and wood chips. Do not spray,
wash, or immerse the air vents in water.
2. Wipe off the housing and the plastic components us-
ing a moist, soft cloth. Do not use strong solvents or
detergents on the plastic housing or plastic components.
Certain household cleaners may cause damage, and may
cause a shock hazard.
3. Routinely clean out the dust and debris that gathers
under the tension housing, the oil outlet, and around the
bar and the chain sprocket. Otherwise it can jam up the
sprocket, the chain, and the lubrication system.
4. If the chainsaw is not used for an extended period of
time, remove the chain oil from the tank. Briefly place the
chain and the guide bar in an oil bath and then wrap in
oil paper to dry.
LUBRICATION
All bearings and gears are sealed and permanently lubri-
cated. No further lubrication is required.
WARNING! To avoid accidents, turn the tool OFF and remove the batteries from the terminals before clean-
ing, adjusting, or performing any maintenance or lubrication work.
WARNING! Any attempt to repair or replace electrical parts on this tool may be hazardous. Servicing of the
tool must be performed by a qualified technician. When servicing, use only identical WEN replacement parts.
Use of other parts may be hazardous or induce product failure.
AUTOMATIC CHAIN LUBRICATION
Regularly check the functionality of the automatic chain
lubrication in order to prevent overheating and the sub-
sequent damage to the guide bar and saw chain asso-
ciated with it. For this purpose, align the guide bar tip
against a smooth surface (board, cut-in of a tree) and
allow the chainsaw to run. If an increasing amount of
oil appears, the automatic chain lubrication functions
properly.
STORING THE BATTERIES AND CHARGER
• Make sure the batteries are fully charged before stor-
age in order to maximize the life of the batteries.
• Do not store the battery packs on the tool. Remove the
batteries from the tool before storage.
• After charging, the battery packs may be stored on the
charger, as long as the charger is not plugged in.
• Store the charger at normal room temperature. Do not
store it in excessive heat. Do not use the charger in di-
rect sunlight or in damp conditions. Do not charge out-
side. Recharge at room temperature.
• Keep the charger clean and clear of debris. Do not al-
low foreign material to get into the recessed cavity or
onto the contacts. Wipe the charger clean with a dry
cloth. Do not use solvents or water, and do not place the
charger in wet conditions.
• Always unplug the charger when charging is complete.
Never leave your charger plugged in if it is not charging
batteries.
PRODUCT DISPOSAL
Used power tools should not be disposed of together
with household waste. This product contains electronic
components that should be recycled. Please take this
product to your local recycling facility for responsible
disposal and to minimize its environmental impact.
21
EXPLODED VIEW & PARTS LIST
NOTE: Not all parts may be available for purchase. Parts and accessories that wear
down over the course of normal use are not covered under the warranty.
22
EXPLODED VIEW & PARTS LIST
NO. PART NO. DESCRIPTION QTY.
1 20754-001 Right Housing 1
2 20754-002 Oil Pump Fix Plate 1
3 20754-003 Brake Spring 1
4 20754-004 Brake Belt 1
5 20754-005
Pin Φ3x9
1
6 20754-006
Washer, Φ5xΦ12x1.0
1
7 20754-007 Screw, ST4.2x10 14
8 20754-008 Sleeve 1
9 20754-009 Oil Pump Turbo 1
10 20754-010 Brake Plate 1
11 20754-011
O Ring, Φ10x2.5
1
12 20754-012 Sprocket 1
13 20754-013 Circlip 1
14 20754-014 Brake Hinge 1
15 20754-015 Brake Switch 1
16 20754-016 Oil Pump 1
17 20754-017 Hex Screw, M4x8 1
18 20754-018 Oil Inlet Tube 1
19 20754-019 Oil Outlet Tube 1
20 20754-020 Oil Filter 1
21 20754-021 Brake Belt Seat 1
22 20754-022 Spring 2
23 20754-023 Brake Handle Sleeve 1
24 20754-024 Brake Handle 1
25 20754-025 Air Nozzle 1
26 20754-026 Air Nozzle Sealing Cap 1
27 20754-027 LED Display 1
28 20754-028 LED Display PCB 1
29 20754-029 Screw, ST2.2x4.5 2
30 20754-030 LED Display Wire Bus 1
31 20754-031 Wire Holder 1
32 20754-032 Trigger 1
33 20754-033 Trigger Control Knob 1
34 20754-034 Switch LED 1
35 20754-035
Brake-Power-Off
Signal Wire
1
NO. PART NO. DESCRIPTION QTY.
36 20754-036 Controller PCB 1
37 20754-037 Hex Screw M5x20 3
38 20754-038 Motor 1
39 20754-039 Wind Shield 1
40 20754-040 Switch 1
41 20754-041 Switch Seat 1
42 20754-042 Battery Pin 2
43 20754-043 Screw ST4.2x18 25
44 20754-044 Front Handle 1
45 20754-045 Battery Socket Left 1
46 20754-046 Battery Socket Right 1
47 20754-047 Left Housing 1
48 20754-048 Handle Cover Left 1
49 20754-049 Oil Cap Hanger 1
50 20754-050 O Ring 1
51 20754-051 Oil Tank Cap 1
52 20754-052 Right Housing Cover 1
53 20754-053 Bumper 1
54 20754-054 Chain Protection Piece 1
55 20754-055 Handle Cover Right 1
56 20754-056 Chain 1
57 20754-057 Screw M4x8 3
58 20754-058 Guide Bar 1
59 20754-059 Chain Guide 1
60 20754-060 Screw ST4.2x12 3
61 20754-061 Guide Wheel 1
62 20754-062 Guide Cover 1
63 20754-063
Guide Wheel Lower
Bracket
1
64 20754-064 Steel Ball, 5mm 3
65 20754-065 Spring 3
66 20754-066
Guide Wheel Upper
Bracket
1
67 20754-067 Screw ST3.9x10 3
68 20754-068 Circlip 1
69 20754-069 Tension Lock Knob 1
N.P. 20754-070 Chain Scabbard 1
NOTE: Not all parts may be available for purchase. Parts and accessories that wear
down over the course of normal use are not covered under the warranty.
23
EXPLODED VIEW & PARTS LISTWARRANTY STATEMENT
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, or other conditions adversely affecting the
Product or the component of the Product, whether by accident or intentionally, 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 tech-
[email protected] or 1-847-429-9263 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 replacements can be shipped out.
Upon the confirmation of a WEN representative, your product may qualify for repairs and service work. When returning
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, IN-
CLUDING BELTS, BRUSHES, BLADES, BATTERIES, ETC. ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURA-
TION 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 COUN-
TRY.
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, CONTACT
THE WEN CUSTOMER SUPPORT LINE. FOR WARRANTY PARTS OR PRODUCTS REPAIRED UNDER WARRANTY
SHIPPING TO ADDRESSES OUTSIDE OF THE CONTIGUOUS UNITED STATES, ADDITIONAL SHIPPING CHARGES MAY
APPLY.
24
V. 2024.07.30
