Wen DF1200X User manual

12000-WATT DUAL FUEL
PORTABLE GENERATOR
Instruction Manual
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
MODEL DF1200X

CONTENTS
WELCOME 3
Specifications................................................................................................... 3
Introduction ..................................................................................................... 4
SAFETY 5
General Safety Rules........................................................................................ 5
Generator Safety Warnings .............................................................................. 7
BEFORE OPERATING 10
Know Your Generator..................................................................................... 10
Unpacking & Packing List.............................................................................. 12
Assembly & Adjustments............................................................................... 12
Generator Preparation.................................................................................... 14
OPERATION & MAINTENANCE 20
Starting the Generator.................................................................................... 20
Using the Generator....................................................................................... 22
Shutting Off the Generator ............................................................................. 26
Maintenance................................................................................................... 27
Transportation & Storage............................................................................... 33
Troubleshooting Guide ................................................................................... 34
Wiring Diagram.............................................................................................. 35
Exploded View & Parts List............................................................................ 36
Warranty Statement ....................................................................................... 44
2
To purchase accessories and replacement parts for your tool, visit WENPRODUCTS.COM
Extra-Large Magnetic Oil Dipstick (Model GNA273)
Universal Weatherproof Extra Large Generator Cover (Model 56413)
25 ft. Generator Extension Cord (Model PC2525-3)
3 ft. Generator Extension Cord Splitter (Model PC3104-2)
15 ft. Generator Adapter Extension Cord (Model PC5030)

3
SPECIFICATIONS
Model Number DF1200X
Surge (Starting) Wattage 12000W (Gasoline) / 11000W (LPG)
Rated (Running) Wattage 9500W (Gasoline) / 9000W (LPG)
Rated Voltage 120V / 240V AC, 12V DC
Rated Amperage 79.2A / 39.6A AC, 8.3A DC
Phase Single
Frequency 60 Hz
Recommended LPG Tank Size 20 - 40 lbs
Battery 12V 14Ah lead-acid AGM
Product Weight With Wheel Kit: 211.6 lbs
Without Wheel Kit: 207.2 lbs
Product Dimensions With Wheel Kit: 29.13 x 28.35 x 25.5 inches
Without Wheel Kit: 27.44 x 22.17 x 22.44 inches
GENERATOR
Engine Type OHV, 4-stroke, single cylinder
Engine Displacement 500cc
Fuel Tank Capacity 8.2 gallons (31.00 L)
Oil Capacity 32 fl. oz.
Half-Load Run Time 7.5 hours (gasoline) / 4.25 hours (20 lb LPG tank)
No-Load Speed 3800 RPM
Lubrication System Forced Splash
Spark Plug Type Torch F6TC (NGK BP6ES)
Spark Plug Gap 0.7 - 0.8mm (0.028 - 0.031 in.)
Spark Plug Torque ½ - ¾ turn after gasket contacts base or 17 ft-lbs (23Nm)
ENGINE

INTRODUCTION
Thanks for purchasing the WEN 12000-Watt Portable Generator. Refer to the illustration below for the location of
the serial number on the specifications label. 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: DF1200X
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 the “Maintenance” section of the manual.
Service Record Date Date Date Date Date Date
Change Oil
Change Spark Plug
Clean Fuel Tank
Clean Air Cleaner
Clean Spark Arrestor
4
Serial Number

5
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.

6
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.
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.

7
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 in-
stalled by a qualified electrician and connected to a transfer switch as a separately derived system in accordance
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 conductor. 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. For more information, visit
www.P65Warnings.ca.gov

8
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 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 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 maxi-
mize 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 pow-
er cord is broken, damaged, or defective, make sure
it is repaired or replaced before operation. Service
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 highly
conductive areas such as metal decking or steel work.
Extension cords with in-line GFCIs are recommended for
these operations to maximize safety.
5. If connecting the generator to a building’s electri-
cal system for standby power, you MUST consult a
qualified 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.
GENERATOR SAFETY WARNINGS

9
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 en-
gine with electrical devices plugged in to the receptacles.
Failure to do so could damage the generator and/or con-
nected 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 be-
fore touching engine or areas of the generator that be-
come hot during use.
8. Turn off all connected electrical devices before stop-
ping the generator.
9. Always turn generator off before refueling.
Allow generator to cool for at least 2 minutes before re-
moving fuel cap. Loosen cap slowly to relieve pressure
in tank.
10. Turn the engine switch to “STOP” 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.

10
KNOW YOUR GENERATOR
TOOL PURPOSE
Generators provide you with power when and where you need it most. 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
Handle
Spark Plug Cap
Muffler
Air Filter
Fuel Valve
Wheels
Oil Fill & Dipstick
Control Panel
Recoil Starter
Choke Lever
Battery
Fuel Cap Fuel Gauge
Pressure Relief Valve
LPG Inlet

11
KNOW YOUR GENERATOR
CONTROL PANEL
1 2 4 8
9
1. Oil Level LED
Illuminates if the oil level is too low.
2. Engine Key Switch
Start and shut down the engine.
3. CO WATCHDOG Carbon Monoxide Monitor
Measures the accumulation of poisonous CO gas while the
generator is running. If the level of CO gas gets too high,
the CO Watchdog system will automatically shut down the
generator. See p. 25 for more information.
4. Data Meter
Displays voltage, frequency, total runtime (HHHH), and ses-
sion runtime (HH:MM). Press the MODE button to switch
between displays.
5. AC Circuit Breakers (for 5-20R Receptacles)
Push the button to reset the circuit.
6. AC Circuit Breakers (for L14-30R Receptacle)
Push the button to reset the circuit.
7. NEMA 14-50R Receptacle
AC 120V / 240V.
8. Main Circuit Breaker
Flip the lever to reset the circuit.
9. Grounding Nut
10. NEMA L14-30R Receptacle
AC 120V / 240V
11. AC 120V NEMA 5-20R Receptacles
12. DC 12V Cigarette-Lighter Style Receptacle
13. DC Circuit Breaker (for DC 12V Receptacle)
Push the button to reset the circuit.
14. Fuel Switch
Turn the dial to easily switch between gasoline or LPG
before operation. Turn to "Storage" when storing the
generator.
3
14
7
101112
5 6
13

12
UNPACKING
With the help of a friend or trustworthy foe, such as one
of your in-laws, 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 everything is removed. Check the packing
list below to make sure you have all of the parts and acces-
sories. If any part is missing or broken, please contact cus-
tomer service at 1-800-232-1195 (M-F 8-5 CST), or email
[email protected].
UNPACKING & PACKING LIST
Components
Generator.................................1
Foot Assembly
Foot..........................................2
Foot Bracket.............................2
M6x25 Bolt ..............................2
M8x25 Bolt ..............................4
M6 Hex Nut..............................2
M8 Hex Nut..............................4
Handle Assembly
Handle......................................2
M8x50 Bolt ..............................2
M8 Lock Nut ............................2
Wheel Assembly
Wheel.......................................2
Wheel Axel ...............................2
17mm Flat Washer...................2
Cotter Pin.................................2
Tools & Accessories
Oil Bottle .....................................................1
LPG Regulator & Hose................................1
Funnel .........................................................1
Spark Plug Socket.......................................1
Tool Bag......................................................1
10mm x 12mm Wrench ..............................1
13mm x 15mm Wrench ..............................1
IMPORTANT: Two red shipping brackets have been added to the bottom of your generator to protect the genera-
tor during shipping. Please make sure to remove BOTH shipping brackets before operation. See Fig. 1.
Fig. 1
PACKING LIST
ASSEMBLY & ADJUSTMENTS
WARNING! Do not turn on the generator until it is fully assembled according to the instructions. Read
through and become familiarized with the following procedures of handling and adjusting your tool. Failure to
follow the safety instructions may result in serious personal injury.
• Never use the handles as lifting points to support the entire weight of the generator. Only use the handles
to pull the generator with the help of the wheels.
• Use caution when collapsing the handles. Hands and fingers could get caught and pinched.

13
ASSEMBLY & ADJUSTMENTS
ASSEMBLY
Refer to the packing list to gather the proper parts and
tools for installing the feet, wheels, and handles.
NOTE: There are different sizes of bolts/nuts; be sure to
use the proper bolts/nuts for each assembly step.
INSTALLING THE FEET
The feet are installed on the air filter side of the generator.
1. Prepare a set of blocks on level ground (a 4×4 block of
wood works well). Place the generator on the blocks. Have
someone help you lift the generator.
2. Secure the foot (Fig. 2 - 1) onto the bottom of the foot
bracket (Fig. 2 - 2) with an M6x25 bolt (Fig. 2 - 3) and an
M6 nut (Fig. 2 - 4). Repeat for the other foot.
3. Align the foot bracket with the holes on the frame and
secure with an M8x25 bolt and an M8 nut (Fig. 2 - 5). Re-
peat for the other bracket.
INSTALLING THE WHEELS
1. Slide one of the wheels (Fig. 3 - 1) and a 17mm flat
washer (Fig. 3 - 2) onto the wheel axle (Fig. 3 - 3).
2. Align the wheel axle with the holes on the frame and
secure it with the cotter pin (Fig. 3 - 4).
3. Repeat steps 1 and 2 for the other wheel.
INSTALLING THE HANDLES
The handles are installed on the air filter side of the genera-
tor.
1. Align the handle (Fig. 4 - 1) with the holes on the genera-
tor frame.
2. Secure using an M8x50 bolt and an M8 nut (Fig. 4 - 2).
3. Repeat steps 1 and 2 for the other handle.
CONNECTING THE LPG HOSE
1. Connect the fitting (Fig. 5 - 1) on the LPG regulator hose
to the LPG tank (not included).
2. Connect the nut (Fig. 5 - 2) on the other end of the LPG
hose to the LPG inlet on the generator (Fig. 5 - 3). See pp.
16 - 17 for more information.
Fig. 2
Fig. 3
Fig. 4
Fig. 5
5
1
2
3
4
1
2
3
4
2
1
1
2
3

14
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 generator is shipped without oil. User must add the proper amount of oil before operating the generator for the
first time. The oil capacity of the engine crankcase is 32 fl. oz. (0.95 L).
CAUTION! Keep the generator level. Tilting the generator
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 en-
gine is OFF before adding or checking oil.
2. Unscrew the oil dipstick (Fig. 5) 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. 6.
4. Reinstall the oil dipstick and firmly tighten it. Wipe clean
any spilled oil.
NOTE: Extend the lifespan of your generator by catching the
loose metal filaments that naturally build up inside the crank
case with the WEN Magnetic Dipstick (Model GNA273),
available for purchase at wenproducts.com.
• 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 Petroleum 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.
°F
°C
-20 0 20 32 40 60 80 100
40200
-20 -10 10
-30 30
Upper Fill Line
Lower Fill Line
Dipstick
Fig. 5
30W
10W-30
Synthetic 5W-30
Fig. 6

15
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. 7.
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 8.2 US gallons (31.00L).
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.
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. If not, the Oil Alert LED on the control panel may
illuminate. Check the oil level, add oil if necessary, and restart the engine.
STEP 2 - ADD/CHECK FUEL
FUEL OPTION A: GASOLINE
GENERATOR PREPARATION
Fig. 7

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. 8) 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. 8) 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".
GENERATOR PREPARATION
Fuel Cap
Fuel
Gauge
WARNING! If using gasoline, the LPG tank must be shut OFF. If using LPG, the fuel valve on the generator
must be turned to OFF position.
FUEL OPTION B: LIQUID PETROLEUM GAS (LPG)
DANGER! Explosion and fire. LP vapors are extremely flammable and explosive. Do not use or store LP
cylinder in a building, garage or enclosed area. Failure to do so will result in death or serious injury.
WARNING! Explosion and fire. The cylinder valve should be turned OFF (closed) when generator is not in
use. Failure to do so could result in death or serious injury.
• Always keep the LPG cylinder in an upright position.
• When transporting and storing, keep cylinder secured in an upright position with cylinder valve turned off. Keep
cylinders ventilated and away from heat when in a vehicle.
• Liquid Petroleum Gas (LPG) is highly flammable and explosive. Flammable gas under pressure can cause a fire
or explosion if ignited.
• In any petroleum gas fire, flames should not be extinguished unless the fuel supply valve is turned OFF. If a fire
is extinguished and a supply of fuel is not turned OFF, an explosion hazard could be created.
• RISK OF BURNS. Contact with liquid contents of cylinder will cause freeze burns to the skin. If liquid contents
contacts skin or eyes, seek immediate medical attention.
• When exchanging LPG cylinders, be sure the cylinder valve is of the same type.
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Fig. 8

GENERATOR PREPARATION
FUEL OPTION B: LIQUID PETROLEUM GAS (LPG) (CONT.)
NOTE: LPG regulator inlet pressure is approximately 30 PSI at 0 °F, and 218 PSI at 100 °F.
• You can use LPG tanks with Type 1, right hand Acme threads with this generator. Verify that the qualification date
on tank has not expired. Do not use rusted or damaged cylinders.
• All new cylinders must be purged of air and moisture prior to filling. Used cylinders that have not been plugged or
kept closed must also be purged.
• The purging process should be done by the propane gas supplier. (Cylinders from an exchange supplier should
have been purged and properly filled by supplier).
To connect your generator to an LPG cylinder:
1. Take off the safety caps from the cylinder valve, generator mounted
regulator, and regulator connecting hose ends.
2. With the LPG tank closed, attach the LPG regulator connecting hose
to the valve. Turn the plastic coupling from the hose right (clockwise) to
tighten hose assembly onto the LPG tank (Fig. 9).
3. Connect the opposite regulator connecting hose end to the genera-
tor’s LPG primary regulator with a 3/4 in. (19mm) wrench (not supplied)
(Fig. 10).
4. Turn the LPG tank valve ON (Fig. 11) and check for leaks by spraying
soapy water to check connections. If bubbles appear, become larger in
size, or increase in number, a leak exists. This must be corrected be-
fore using generator. Contact your local Independent Authorized Service
Dealer (IASD) for assistance.
NOTE: You can use Teflon (or other tape) to secure the connection of the
LPG hose to your generator.
Fig. 9
CAUTION! Always position the LPG cylinder so the connection
between the valve and regulator won’t cause sharp bends or kinks in
hose.
WARNING! Risk of burns. Contact with liquid contents of cylinder
will cause freeze burns to the skin. If liquid contents contacts skin or
eyes, seek immediate medical attention.
WARNING! When transporting and storing, keep cylinder
secured in an upright position with cylinder valve turned off. Keep
cylinders ventilated and away from heat when in a vehicle.
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Fig. 10
Fig. 11

GENERATOR PREPARATION
WARNING! BATTERY GIVES OFF EXPLOSIVE HYDROGEN GAS.
• Keep battery away from spark, flame, or cigarette.
• Do not connect or disconnect battery while generator is running.
• Service or use battery only in well ventilated areas.
WARNING! Battery contains sulfuric acid. Battery acid is poisonous. Tilting the generator with the battery
installed can cause battery acid to spill.
• Wear protective clothing and eye wear when servicing battery.
• Keep out of reach of children.
• Do not tilt generator with battery installed.
• If battery acid gets on your skin, wash with water immediately.
• If battery acid gets in your eyes, flush with water for at least 15 minutes and call a doctor immediately.
If battery acid is swallowed, call a doctor immediately. Drink a large amount of water or milk. Then drink milk of
magnesia or vegetable oil.
The generator comes with the battery disconnected for safety. When using gasoline to run the generator, the battery
DOES NOT need to be connected whether using electric or recoil start. The battery MUST be connected for electric
start or recoil start when using LPG.
To connect the battery:
1. Remove the red cover from the positive (+) battery terminal.
2. Connect the red cable to the positive (+) battery terminal with the suitable nuts and bolts.
3. Attach the free end of the negative cable to the battery and secure the connection.
4. Make sure connections are secure and slide rubber boot over the positive (+) battery terminal and connection
hardware.
5. Connect the black cable to the negative (-) battery terminal with the suitable nuts and bolts.
6. Make sure all connections are secure and slide rubber boot over the negative (-) battery terminal and connection
hardware.
IMPORTANT: If you do not plan to use the generator for an extended period of time, it is recommended to DISCON-
NECT the negative battery cable from the battery to protect the battery from losing charge. After disconnecting the
cable, cover the free end with an insulator such as electrical tape.
STEP 3 - CONNECT THE BATTERY
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After completing the above preparation, the generator is ready to be started.
GENERATOR PREPARATION
STEP 4 - GROUND THE GENERATOR
To reduce the risk of electric shock and to maximize safety,
the generator should be properly grounded.
Ground the generator by tightening the grounding nut on
the front control panel (Fig. 12) against a grounding wire.
A generally acceptable grounding wire is a No. 12 AWG
(American Wire Gauge) stranded copper wire.
This grounding wire should be connected at the other end
to a copper, brass, or steel-grounding rod that is driven
into the earth. Wire and grounding rods are not included
with the generator.
Fig. 12
NOTE: Grounding codes can vary by location. Contact a local electrician to check the area codes.
WARNING! Failure to properly ground the generator increases your risk of electric shock.
HIGH ALTITUDE OPERATION ABOVE 3000 FEET
The fuel system on this generator may be affected by operation at high altitudes. Proper operation can be ensured by
installing an altitude kit at altitudes higher than 3000 feet above sea level. At elevations above 8000 feet, the engine
may experience a decrease in performance, even with the proper altitude kit. Operating this generator without said
kit may increase the engine’s emissions and decrease both fuel economy and performance.
This kit should be installed by a qualified mechanic. You can order the kit at wenproducts.com by searching part
number DF1200X-HA36 & DF1200X-HA68. Refer to the instructions included with your altitude kit for more infor-
mation about installation.
WARNING! To prevent serious injury from fire, follow the kit installation procedures in a well-ventilated
area away from ignition sources. If the engine is hot from use, shut the engine off and wait for it to cool before
proceeding. Do not smoke near the generator. Warranty will be void if adjustments are not made for high altitude
use.
CAUTION: Engines with the high-altitude kit installed operated at lower altitudes could cause severe engine dam-
age and affect emissions compliance. Be sure to uninstall the high altitude kit when operating at altitudes below
3000 feet.
Grounding Nut
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STARTING THE GENERATOR
CAUTION! Disconnect all electrical loads from the generator before attempting to start it.
Before starting the generator, make sure you have read and performed the steps in the “Generator Preparation” sec-
tion of this manual. 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."
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.
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 unless a qualified electrician has connected the generator 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.
20