Wen DF402iX User manual

4000-WATT DUAL FUEL
INVERTER 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 DF402iX

222
CONTENTS
WELCOME 3
Specifications................................................................................................... 3
Introduction ..................................................................................................... 4
SAFETY 5
Safety Information ........................................................................................... 5
Generator Safety Warnings .............................................................................. 6
BEFORE OPERATING 8
Unpacking & Packing List................................................................................ 8
Assembly & Adjustments............................................................................... 10
Know Your Generator..................................................................................... 11
Generator Preparation.................................................................................... 13
OPERATION & MAINTENANCE 18
Starting Your Generator ................................................................................. 18
Using Your Generator..................................................................................... 21
Shutting Off Your Generator........................................................................... 26
Maintenance................................................................................................... 27
Transportation & Storage............................................................................... 32
Troubleshooting Guide................................................................................... 33
Wiring Diagram.............................................................................................. 34
Exploded View & Parts List............................................................................ 35
Warranty Statement ....................................................................................... 41
To purchase accessories for your tool, visit WENPRODUCTS.COM
Magnetic Oil Dipstick (Model No. 55201)
Generator Cover (Model 56310iC and GNC400)
30A 3600W Parallel Connection Kit (Model GNA36i)
50A 6000W Parallel Connection Kit (Model GNA50i)
High Altitude Kit (Model DF402iX-HA36 and DF402iX-HA68)

CONTENTSSPECIFICATIONS
3
Model Number DF402iX
Surge (Starting) Wattage 4000W (Gas) 3600W (LPG)
Rated (Running) Wattage 3500W (Gas) 3200W (LPG)
Rated Voltage 120V AC
Rated Amperage 29.2A
Phase Single
Frequency 60Hz
Product Weight 66.1 lbs
Product Dimensions 19.8 in. × 13.8 in. × 18.9 in.
GENERATOR
Engine Type 4 stroke, OHV, single cylinder with forced air
cooling system
Engine Displacement 212cc
Fuel Tank Capacity 1.85 US Gallons (7.00 L), 87 Octane Minimum
Oil Capacity 17.0 fl. oz. (0.5 L)
Half-Load Run Time (Gas) 7 Hours
Half-Load Run Time (LPG) 9.5 Hours with 20-lb Tank and Eco-Mode ON
Lubrication System Forced Splash
Spark Plug Type Torch F6RTC (NGK BPR6ES)
Spark Plug Gap 0.7 - 0.8 mm (0.028 - 0.031 in.)
Spark Plug Torque ½ - ¾ turn after gasket contacts base
or 15 ft-lbs (20.33 Nm)
ENGINE

4
INTRODUCTION
Thanks for purchasing the WEN 4000-Watt Dual Fuel Inverter Generator. Refer to the illustration below for the loca-
tions of the serial number on the side of the engine or on the serial number label. Record the generator information
in the spaces provided below. If assistance 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: DF402iX
Date of Purchase: ______________________________________________
Purchased From:_______________________________________________
Serial Number: ________________________________________________
TO MAXIMIZE THE LIFESPAN OF YOUR GENERATOR: We recommend running your generator at least once a
month for 20 to 30 minutes. Start the generator according to the instructions and plug a small load in to make
sure the outlet is producing electricity.
SERVICE RECORD
Record the service dates of your generator in the chart below. Please perform maintenance checks and operations
according to this manual. Refer to the "Maintenance" section.
Service Record Date Date Date Date Date Date
Change Oil
Change Spark Plug
Clean Fuel Tank
Clean Air Cleaner
Clean Spark Arrestor
Serial Number

5
SAFETY INFORMATION
WARNING: Before operating the generator, make sure to read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result in electric shock, fire or serious injury.
SAFETY INTRODUCTION
Safety is a combination of common sense, staying alert, and knowing how your tool works. This manual contains
important information regarding the generator’s potential safety concerns, as well as preparation, operation, and
maintenance instructions. Before operating this generator, be sure to read and observe all warnings and instructions
both on the generator labels and in this instruction manual. Failure to follow all instructions listed below may result
in personal injury.
NOTE: The following safety information is not meant to cover all possible conditions and situations that may occur.
WEN reserves the right to change this product and specifications at any time without prior notice.
At WEN, we are continuously improving our products. If you find that your tool does not exactly match this manual,
please visit wenproducts.com for the most up-to-date manual or contact customer service at 1-800-232-1195,
M-F 8-5 CST.
Keep this manual available to all users during the entire life of the tool and review it frequently to maximize
safety for both yourself and others.
SAVE THESE SAFETY INSTRUCTIONS.
SAFETY SYMBOLS
The purpose of following safety symbols is to attract your attention to possible dangers. The safety symbols, and
their explanations, deserve your careful attention and understanding. The safety warnings do not by themselves
eliminate any danger. The instructions or warnings they give are not substitutes for proper accident prevention
measures.
NOTICE REGARDING EMISSIONS
Engines that are certified to comply with U.S. EPA emission regulations for SORE (Small Off Road Equipment), are
certified to operate on regular unleaded gasoline, and may include the following emission control systems: (EM)
Engine Modifications and (TWC) Three-Way Catalyst (if so equipped).
QUESTIONS? PROBLEMS?
In order to answer questions and solve problems in the most efficient and speedy manner, contact customer
service at 1-800-232-1195, M-F 8-5 CST or email [email protected].
DANGER: indicates a hazard, which, if not avoided, will result in death or serious injury.
WARNING: indicates a hazard, which, if not avoided, could result in death or serious injury.
CAUTION: indicates a hazard, which, if not avoided, might result in minor or moderate injury.
CAUTION: when used without the alert symbol, indicates a situation that could result in damage to the machine.

6
GENERATOR SAFETY WARNINGS
DANGER! CARBON MONOXIDE
Using a generator indoors CAN KILL YOU IN MINUTES. Generator exhaust contains carbon monoxide (CO).
This is a poison gas you cannot see or smell. If you can smell the generator exhaust, you are breathing CO. But
even if you cannot smell the exhaust, you could be breathing CO.
NEVER use a generator inside homes, garages, crawl spaces, or other partially enclosed areas. Deadly levels
of carbon monoxide can build up in these areas. Using a fan or opening windows and doors does NOT supply
enough fresh air. ONLY use a generator outside and far away from windows, doors, and vents. These openings
can pull in generator exhaust.
Even if you use a generator correctly, CO may leak into the home. ALWAYS use a battery-powered or battery-
backup CO alarm in the home. If you start to feel sick, dizzy, or weak after the generator has been running,
move to fresh air RIGHT AWAY. See a doctor. You may have carbon monoxide poisoning.
WARNING! RISK OF EXPLOSION. HIGHLY FLAMMABLE: This generator may emit highly flammable and
explosive gasoline vapors, which can cause severe burns or even death, if ignited. A nearby open flame can lead
to explosion even if not directly in contact with gasoline.
• Do not operate near open flame, heat, or any other ignition source. Do not smoke near the generator.
• Always operate on a firm, level surface.
• Always turn generator off before refueling. Allow generator to cool for at least 2 minutes before removing
fuel cap. Loosen cap slowly to relieve pressure in tank.
• Do not overfill fuel tank. Gasoline may expand during operation. Do not fill to the top of the tank. Allow for
expansion. Always check for spilled fuel before operating.
• If fuel spills, move the generator at least 30 feet away from the spill and wipe clean any spilled fuel before
starting the engine.
• Empty fuel tank before storing or transporting the generator.
WARNING! If this generator is used as a supply for a building’s wiring system, the generator must be
installed by a qualified electrician and connected to a transfer switch as a separately derived system in accor-
dance with all applicable laws and electrical codes and the National Electrical Code, NFPA 70. The generator
shall be connected to a transfer switch that switches all conductors excluding the equipment grounding con-
ductor. The frame of the generator shall be connected to an approved grounding electrode.
CALIFORNIA PROPOSITION 65 WARNING: This product contains chemicals and produces exhaust known
to the State of California to cause cancer, birth defects and other reproductive harm.

7
GENERATOR SAFETY WARNINGS
OPERATING ENVIRONMENT
1. Using a generator indoors can kill you in minutes.
Only use a generator outside and far away from win-
dows, doors and vents.
2. Do not smoke near the generator.
3. Do not operate near open flame, heat, or 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 max-
imize safety (see “Ground the Generator” section).
2. Do not overfill fuel tank, as gasoline may expand
during operation. Do not fill to the very top of the tank.
Leave room for gasoline expansion. Always check for
spilled fuel before operating.
3. If any part of the generator, electrical device or
power cord is broken, damaged, or defective, make
sure it is repaired or replaced before operation. Ser-
vice should only be performed by a qualified technician.
Do not use receptacles or cords that show signs of
damage, such as broken or cracked insulation.
4. Use a ground fault circuit interrupter (GFCI) in high-
ly conductive areas such as metal decking or steel
work. Extension cords with in-line GFCIs are recom-
mended for these operations to maximize safety.
5. If connecting the generator to a building’s electrical
system for standby power, you MUST consult a quali-
fied electrician and install a transfer switch. Such
connections must comply with local electrical laws and
codes. Failure to comply can create a back-feed, which
may result in serious injury or death to utility workers.
6. Never modify the generator in any way. Modifying
or using the machine for any other purpose for which it
is not designed may result in serious injuries, machine
damage and voiding of the warranty.
GENERATOR OPERATION
1. Only use the generator for its intended purposes.
Modifying or using the generator for operations for
which it was not designed may cause hazards and per-
sonal injury.
2. Do not touch bare wires or receptacles (outlets).
3. Do not exceed the wattage capacity of the generator
by plugging in more electrical devices than the unit
can handle. This could damage the generator and/or
connected electrical devices. Check the operating volt-
age and frequency requirements of all electrical devices
prior to plugging them into the generator.
Generator safety warnings continue on the next page.
WARNING! Do not let comfort or familiarity with the product replace strict adherence to product safety
rules. Failure to follow the safety instructions may result in serious personal injury.

8
UNPACKING
With the help of a friend or trustworthy foe, carefully remove the generator from the packaging and place it on a
sturdy, flat surface. Make sure to take out all contents and accessories. Do not discard the packaging until every-
thing is removed. Check the packing list on page 9 to make sure you have all of the parts and accessories. If any
part is missing or broken, please contact customer service at 1-800-232-1195 (M-F 8-5 CST), or email
[email protected].
UNPACKING & PACKING LIST
GENERATOR SAFETY WARNINGS
WARNING! Do not let comfort or familiarity with the product replace strict adherence to product safety
rules. Failure to follow the safety instructions may result in serious personal injury.
4. Allow generator to run for several minutes before
connecting electrical devices. Do not start or stop
engine with electrical devices plugged in to the recep-
tacles. Failure to do so could damage the generator and/
or connected electrical devices.
5. Do not turn on electrical devices until after they are
connected to the generator.
6. Generators vibrate in normal use. During and after
the use of the generator, inspect both the generator as
well as extension and power supply cords for damage
resulting from vibration.
7. Do not touch hot parts. This generator produces heat
when running. Temperatures near exhaust can exceed
150ºF (65ºC). Allow generator to cool down after use
before touching engine or areas of the generator that
become hot during use.
8. Turn off all connected electrical devices before
stopping the generator.
9. Always turn generator off before refueling. Allow
generator to cool for at least 2 minutes before removing
fuel cap. Loosen cap slowly to relieve pressure in tank.
10. Turn the engine switch to “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.

Assembly Tools & Accessories
9
UNPACKING & PACKING LIST
Components
High Altitude Kits
3000 - 6000 ft High Altitude Kit (1)
(Part DF402iX-HA36)
Fuel Cup Seal (1)
Bolt Seal (1)
Main Jet (1)
6000 - 8000 ft High Altitude Kit (1)
(Part DF402iX-HA68)
Fuel Cup Seal (1)
Bolt Seal (1)
Main Jet (1)
PACKING LIST
REMOVING THE SHIPPING BRACKETS
Your generator comes with two shipping brackets that pro-
tect the generator during delivery. These brackets should be
removed before using the generator. The shipping brackets
are located on the two lower beams of the generator (Fig.
1). Use the included 8mm/10mm wrench to remove the
two bolts on each bracket, then slide the brackets off. You
will not need the bracket or bolts, please discard appropri-
ately.
Fig. 1
Generator (1)
Funnel (1)
8mm / 10mm
Wrench (1)
Wrench (1)Handle (1)
Regulator
Hose Assembly (1)

HIGH ALTITUDE OPERATION ABOVE 3000 FEET
The fuel system on this generator may be affected by op-
eration 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 en-
gine may experience a decrease in performance, even with
the proper altitude kit. Operating this generator without the
high altitude kit at elevations above 3000 feet may increase
the engine’s emissions and decrease both fuel economy
and performance.
INSTALLING THE HIGH ALTITUDE KIT
This kit should be installed by a qualified mechanic. Con-
tact customer service at 1-800-232-1195 (M-F 8-5 CST),
or email [email protected] for information
about service centers near you.
Gather the parts in the high altitude kit. Refer to page 9.
1. Flip the engine switch to the STOP position.
2. Turn the fuel valve to the OFF position.
3. Prepare an approved gasoline-storage container to catch
any spilled fuel. Place it near the fuel valve.
4. The carburetor can be accessed from the backside of the
generator between the engine and the air filter. Loosen the
bolt (Fig. 2) on the bottom of the carburetor with a Phillips-
head screwdriver (not included). CAUTION! The carburetor
bowl may have gas in it which will leak upon removing
the bolt.
5. Remove the bolt, bolt seal, fuel cup, fuel cup seal, and
main jet from the body of the carburetor assembly. Refer
to Fig. 2.
6. Replace the main jet with the replacement jet needed for
your altitude range (3000-6000 ft or 6000-8000 ft). NOTE:
The fuel cup seal and bolt seal may be damaged during
removal and should be replaced with the new ones from
the kit.
7. Reassemble the fuel cup seal, fuel cup, bolt seal, and
bolt. Tighten with a Phillips-head screwdriver to secure.
ASSEMBLY & ADJUSTMENTS
10
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! UNINSTALL the high altitude kit when
operating at altitudes below 3000 feet.
Fig. 2
CarburetorCarburetor
AssemblyAssembly
Fuel Cup SealFuel Cup Seal
Fuel CupFuel Cup
Main JetMain Jet
Bolt SealBolt Seal
BoltBolt
CAUTION! UNINSTALL the high altitude kit when
operating at altitudes below 3000 feet.
8. Wipe up any spilled fuel and allow excess to evaporate before starting the engine. WARNING! To prevent fire,
do not start the engine while the smell of fuel hangs in the air.

11
KNOW YOUR GENERATOR
KNOW YOUR GENERATOR
Refer to the following diagrams to become familiarized with all the parts and controls of your generator. The com-
ponents will be referred to later in the manual for assembly and operation instructions.
GENERATOR
Fuel Cap
Control Panel
Fuel Gauge
Muffler
Oil Drain Plug
Oil Fill & Dipstick
LPG Inlet
Recoil Starter
Fuel Valve
Air Filter
Spark Plug
Carrying Handles

1212
KNOW YOUR GENERATOR
CONTROL PANEL
1. AC 120V NEMA TT-30R RV Receptacle
Standard RV connector.
2. Engine Switch
This switch makes the engine run or stop.
3. Eco-Mode Switch
Flip this switch to ON to increase fuel economy and
runtime when the load is below 2400W (75% load).
4. Indicator Lights
The output light (green) will turn on when the recep-
tacles have power, the overload light (red) will turn on
if the generator is overloaded, the oil light (yellow) will
turn on if the oil is low.
5. Choke Button
Adjusts the amount of air allowed into the engine dur-
ing startup.
6. 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 automati-
cally shut down the generator. See p. 22 for more in-
formation.
7. Parallel Connection
Connect your generator to another generator with a
parallel kit to gain more power.
8. Overload Reset
If the overload light is ON, press this button to reset
your generator.
9. DC 5V USB Ports
The upper USB port provides 2.1A, while the lower
port provides 1A of power.
10. AC 120V NEMA 5-20R Duplex Receptacles (20A)
Standard household outlets provide 120V 60Hz pow-
er.
11. Circuit Breaker
Push the button to reset the NEMA 5-20R circuit.
12. Grounding Nut
Ground the generator to reduce the risk of electric
shock. Refer to "Step 3 - Ground The Generator" on
page 17.
5
2
3
1
7
8
9
4
6
10
11
12

13
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 17.0 fl. oz. (0.5 L).
Fig. 4
Fig. 5
CAUTION! Keep the generator level. Tilting the genera-
tor to assist in filling will cause oil to flow into the wrong
areas of the engine and cause damage.
TO ADD OIL:
1. Place the generator on a level surface. Make sure the
engine is OFF before adding or checking oil.
2. Unscrew the oil dipstick (Fig. 4) 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. 5.
4. Reinstall the oil dipstick and firmly tighten it. Wipe clean
any spilled oil.
CAUTION! For subsequent operation, the oil level should
be checked before each use, or after every 8 hours of op-
eration. The generator is equipped with a low-oil sensor
and will not start without a sufficient amount of oil. Follow
the instructions on the next page to check the oil level.
Synthetic 5W-30
30W
10W-30
• 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. For general use
(above 40° F), we recommend using 30W engine oil.
°F
°C
-20 0 20 32 40 60 80 100
40200
-20 -10 10
-30 30
Fig. 3
Dipstick
Upper Level
Fill Line
Lower LevelLower Level
Fill LineFill Line
Lower Level
Fill Line
Dipstick

1514
GENERATOR PREPARATION
Lower Limit
Upper Limit
TO CHECK OIL LEVEL (before every subsequent start):
1. Place the generator on a level surface. Make sure the
engine is OFF before adding or checking oil.
2. Remove and wipe the dipstick with a clean rag.
3. Insert the dipstick into the oil fill without screwing it in.
Remove the dipstick to check the oil mark.
4. If the oil mark covers less than one half of the dipstick,
slowly add oil until the oil mark reaches the top of the dip-
stick (or when you can see the oil coming halfway up the
oil fill threads). See Fig. 6.
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.
TIP: Your WEN generator is compatible with the
WEN 55201 Magnetic Oil Dipstick (not included),
available for purchase at wenproducts.com. The
dipstick’s industrial-strength magnetic tip will
collect metal shavings from your generator’s oil
tank to help preserve the engine and extend your
generator’s lifespan.
Fig. 6
14

1514 15
GENERATOR PREPARATION
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.
STEP 2 - ADD / CHECK FUEL
Use ONLY fresh (within 30 days from purchase), lead-free gasoline with a minimum of 87 octane rating. The
generator performs best with ethanol-free gasoline. DO NOT use gasoline with over 10% ethanol. The capacity of
the fuel tank is 1.85 US gallons (7.00 L). Do not mix oil with gasoline.
To add gasoline:
1. Make sure the generator is shut OFF and on a level
surface. Unscrew the fuel cap (Fig. 7) and set it aside. The
fuel cap may be tight and hard to unscrew.
2. Slowly add unleaded gasoline to the fuel tank. Be careful
not to overfill.
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.
3. Reinstall fuel cap and wipe clean any spilled gasoline
with a dry cloth.
To check gas level (before every subsequent start):
1. Before starting the generator, check the fuel gauge (Fig.
7) 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".
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.
Fuel Cap
FUEL OPTION A: GASOLINE
Fuel Gauge Fig. 7

GENERATOR PREPARATION
STEP 2 - ADD / CHECK FUEL (CONTINUED)
FUEL OPTION B: LIQUID PETROLEUM GAS (LPG)
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 valve closed, attach the LPG regulator connecting
hose to the valve. Turn the plastic coupling from the hose right (clock-
wise) to tighten hose assembly onto the LPG tank (Fig. 8).
3. Remove the protective rubber cover from the LPG inlet (Fig. 9 - 1)
on the side of the generator. Connect the nut on the other end of the
regulator connecting hose to the LPG inlet. Tighten the nut using the
a wrench.
4. Turn the LPG tank valve ON (Fig. 10) 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
before using generator. Contact WEN customer service at 1-800-232-
1195, M-F 8-5 CST, or email [email protected] for as-
sistance.
NOTE: You can use Teflon (or other tape) to secure the connection of
the LPG hose to your generator.
NOTE: If you would like to purchase other accessories for your dual-
fuel generator, consult your local dealer of propane and propane ac-
cessories, I tell you what.
CAUTION! Always position the LPG cylinder so the connection
between the tank and LPG inlet won’t cause sharp bends or kinks
in the hose.
WARNING! Risk of burns. Contact with liquid contents of cyl-
inder 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.
1
Fig. 8
Fig. 9
Fig. 10
16

GENERATOR PREPARATION
STEP 3 - GROUND THE GENERATOR
To reduce the risk of electric shock and to maximize safety,
the generator should be properly grounded.
1. Attach one end of the grounding wire to the grounding
nut (Fig. 11). Tighten the nut to secure the grounding wire.
2. Connect the other end of the grounding wire to a copper,
brass, or steel-grounding rod that is driven into the earth.
WARNING! Failure to properly ground the
generator increases your risk of electric shock.
NOTE: Grounding wire and grounding rods
are not included with the generator. A general-
ly acceptable grounding wire is a No. 12 AWG
(American Wire Gauge) stranded copper wire.
Grounding codes can vary by location. Contact a
local electrician to check the area codes.
Grounding
Nut
Fig. 11
AUTO FUEL SELECTION
Your generator is equipped with Auto Fuel Selection Technology. What this means is that the generator will auto-
matically select the fuel source (LPG or gasoline) depending on availability. LPG is prioritized; this means that if a
propane tank with enough LPG is connected, the generator will automatically use LPG. If no propane tank is con-
nected, or if there is no LPG remaining in the tank, the generator will use gasoline (if there is gasoline in the fuel
tank). Refer to the table below for information on how to set up your generator for a particular fuel.
Propane tank valve Fuel Valve
I want to use gasoline. Closed Run
I want to use LPG. Open Off or On*
Table 1 – Auto Fuel Selection® chart.*It is ideal to run the generator on LPG with the fuel valve closed (OFF), but
if it stays open, the generator will still run properly.
NOTE: Make sure the generator can handle the load(s) you plan to connect. The generator can provide more power
when running on gasoline than on LPG. Consult the specifications table on p. 3, as well as the chart “Calculating
the Wattage of Your Device(s)” to ensure that your load(s) will not exceed the rated wattage for a particular fuel.
See also "Switching Fuels" section for more information.
17

1918
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”
section of this manual, pages 14-16. If you are unsure about how to perform any of the steps in this manual please
call 1-800-232-1195 (M-F 8-5 CST) for customer service.
To maximize safety, ALWAYS ground the generator before using it. Refer to "Step 3 - Ground The Generator" on
page 17.
Use a ground fault circuit interrupter (GFCI) in highly conductive areas such as metal decking or steel work. GFCIs
are available in-line with some extension cords.
STARTING YOUR GENERATOR
DANGER: CARBON MONOXIDE
Using a generator indoors CAN KILL YOU IN MINUTES. Generator exhaust contains carbon monoxide (CO).
This is a poison gas you cannot see or smell. If you can smell the generator exhaust, you are breathing CO. But
even if you cannot smell the exhaust, you could be breathing CO.
NEVER use a generator inside homes, garages, crawl spaces, or other partially enclosed areas. Deadly levels
of carbon monoxide can build up in these areas. Using a fan or opening windows and doors does NOT supply
enough fresh air. ONLY use a generator outside and far away from windows, doors, and vents. These openings
can pull in generator exhaust.
Even if you use a generator correctly, CO may leak into the home. ALWAYS use a battery-powered or battery-
backup CO alarm in the home. If you start to feel sick, dizzy, or weak after the generator has been running, move
to fresh air RIGHT AWAY. See a doctor. You may have carbon monoxide poisoning.
WARNING: The exhaust from this product contains chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
WARNING: Do not operate generator near open flame or flammable materials This generator may emit
highly flammable and explosive gasoline vapors, which can cause severe burns or even death if ignited. A
nearby open flame can lead to explosion even if it isn’t directly in contact with gasoline. Do not smoke near the
generator.
WARNING: This generator produces powerful voltage, which can result in electrocution.
WARNING: Do not use in rainy or wet conditions. Do not touch bare wires or receptacles (outlets). Do not
allow children or non-qualified persons to operate.
WARNING: Generator should only be connected to electrical devices, either directly or with an extension
cord. NEVER connect to a building electrical system without a qualified electrician and connected to a transfer
switch as a separately derived system. Such connections must comply with local electrical laws and codes.
Failure to comply can create a back-feed, which may result in serious injury or death to utility workers.
Follow the instructions on the next page to start your generator.

1918
BEFORE STARTING THE GENERATOR
1. Verify that the generator is outside on a dry, level surface. Allow at least two feet of clearance on all sides of the
generator.
2. To maximize safety, check that the generator is properly grounded. Refer to "Step 3 - Ground The Generator" on
page 17.
3. Check that there is a sufficient level of oil in the crankcase. Add oil if necessary. Refer to "Step 1 - Add/Check
Oil" on page 13.
4. Check that there is a sufficient level of fuel in the fuel tank. Add gas if necessary. Refer to "Step 2 - Add/Check
Fuel" on page 14. If using LPG, make sure there is enough propane in the tank, and that the tank and regulator
hose are properly connected.
5. Make sure all electrical devices are unplugged from the generator during ignition. Otherwise it will be difficult
for the engine to start.
STARTING YOUR GENERATOR
NOTE: In case you have had repeated failed attempts to start the engine, please consult the troubleshooting
guide before attempting to start the generator. If problems persist please call 1-800-232-1195, M-F 8-5 CST.
STARTING THE GENERATOR (GASOLINE)
1. Turn the fuel valve (Fig. 12 - 1) to the ON position.
2. Pull the choke button out to the CLOSED/START position
(Fig. 13).
3. Flip the engine switch (page 12) to the RUN position.
4. Pull on the recoil starter handle (page 11) slowly until
a slight resistance is felt, then pull quickly to start the en-
gine. Return cord gently into the recoil starter. Never allow
the cord to snap back.
5. If engine fails to start, repeat this step.
6. Once the engine has started, slowly push the choke but-
ton into the OPEN/RUN position (Fig. 13).
7. Allow the engine to run for several minutes before at-
tempting to connect any electrical devices. This allows the
generator to stabilize its speed and temperature. Follow
the instructions in the next section for properly connecting
your electrical devices.
Fig. 12
Fig. 13
ON
OFF
1

2120
STARTING THE GENERATOR (LPG)
1. Turn the fuel valve (Fig. 14 - 1) to the OFF position.
2. Connect the LPG regulator hose assembly to the inlet on
the generator. Turn the LPG tank valve ON.
3. Pull the choke button out to the CLOSED/START position
(Fig. 15).
4. Prime the engine by gently pulling the recoil starter 1 - 3
times.
5. Flip the engine switch (page 12) to the RUN position.
6. Pull on the recoil starter handle (page 11) slowly until a
slight resistance is felt, then pull quickly to start the engine.
Return cord gently into the recoil starter. Never allow the
cord to snap back.
7. If engine fails to start, repeat this step.
8. Once the engine has started, slowly push the choke but-
ton in to the OPEN/RUN position (Fig. 15).
NOTE: If the engine is warm, you may need to adjust the
position of the choke button.
9. Allow the engine to run for several minutes before at-
tempting to connect any electrical devices. This allows the
generator to stabilize its speed and temperature. Follow
the instructions in the next section for properly connecting
your electrical devices.
STARTING YOUR GENERATOR
Fig. 14
Fig. 15
1
ON
OFF