Firman W03385 User manual

Record product information to reference when ordering parts
or obtaining warranty coverage.
MODEL NUMBER
W03385
REV Level 01
P/N:333747010 REV:01
OPERATOR’S MANUAL
GASOLINE PORTABLE GENERATOR
STOP DO NOT RETURN
TO STORE!
FOR QUESTIONS
OR SERVICE INFORMATION
CALL US FIRST
1-844-347-6261
SERIAL NUMBER:
PURCHASE DATE:

Supplier’s Declaration of Conformity
47 CFR § 2.1077 Compliance Information
FIRMAN W03385 INVERTER GENERATOR
FIRMAN POWER EQUIPMENT INC.
8644 W. Ludlow Dr.
Peoria, AZ 85381
1-844-3476261
www.firmanpowerequipment.com
FCC/IC Compliance Statement
1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1a. This device may not cause harmful interference.
1b. This device must accept any interference received, including interference that may cause
undesired operation.
2. Changes or modications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
NOTE: The FIRMAN W03385 inverter generator has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
● Reorient or relocate the receiving antenna.
● Increase the separation between the equipment and receiver.
● Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
● Consult the dealer or an experienced radio/TV technician for help.
Changes or modications to equipment not expressly approved by FIRMAN could void the user’s
authority to operate the equipment.

English Customer Service: 1-844-FIRMAN101
INTRODUCTION
Table of Contents
REGISTER YOUR PRODUCT
Thank you for purchasing a FIRMAN generator. You have selected a high-quality, precision engineered
generator set designed and tested to give you years of satisfactory service. This generator is
designed to run only on unleaded gasoline. This generator is not intended to be run unattended or to
supply power to life safety support.
This manual contains safety information to make you aware of the hazards and risks associated
with generator products and how to avoid them. This generator is designed and intended only for
supplying electrical power for operating compatible electrical lighting, appliances, tools and motor
loads, and is not intended for any other purpose. It is important that you read and understand these
instructions thoroughly before attempting to start or operate this inverter generator. Save these
original instructions for future reference.
All information in this publication is based on the latest production information available at the time
of approval for printing. The manufacturer reserves the right to change, alter or otherwise improve
the generator and this documentation at any time without prior notice.
INTRODUCTION
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features, Controls and On -Product Hazard Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1
Maintenance - Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3
Troubleshooting- Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Parts Diagrams - Parts Lists - Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Service - Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Register your product using the QR code provided or at
www.firmanpowerequipment.com .

English Customer Service: 1-844-FIRMAN102
INTRODUCTION
SIGNAL WORDS
WARNING
Indicates a hazard
which, if not avoided,
could result in death
or serious injury.
DANGER
Indicates a hazard
which, if not avoided,
will result in death or
serious injury.
Safety Alert Symbol- Indicates a potential personal injury hazard.
Operator's Manual- Failure to follow warnings, instructions and
operator's manual could result in death or serious injury.
Toxic Fumes- Engine exhaust contains carbon monoxide, a
poisonous gas that will kill you in minutes. You cannot smell
it or see it.
Generator could cause electrical shock resulting in death or serious
injury.
Fire- Fuel and its vapors are extremely ammable which could
cause burns or re resulting in death or serious injury.Engine
exhaust could cause re resulting in death or serious injury.
Hot Surface- Mufer could cause burns resulting in serious injury.
CAUTION
Indicates a hazard
which, if not avoided,
could result in minor or
moderate injury.
NOTICE
Indicates information
considered Important,
but not hazard-related.

English Customer Service: 1-844-FIRMAN103
INTRODUCTION
WARNING! This product can expose you to chemicals including gasoline engine
exhaust, which is known to the State of California to cause cancer, and carbon
monoxide, which is known to the State of California to cause birth defects or other
reproductive harm. For more information go to www.P65Warnings.ca.gov.
This outdoor generator can be used to power outdoor items using extension cords .
NOTICE If you have questions about intended use, contact FIRMAN customer service. This portable
generator is designed to be used only with FIRMAN authorized parts.
System Ground
The generator neutral is oating, which means that the AC stator winding is isolated from the
grounding fastener and the AC receptacle ground pins. On a oating neutral generator the AC
receptacle ground pins are not functional. Electrical devices, such as a ground fault circuit
interrupter (GFCI), requiring a functioning AC receptacle ground pin will not operate.
Compliance Requirements
There may be Federal or State regulations, local codes, or ordinances that apply to the intended
use of the generator. Consult a qualied electrician, electrical inspector, or the local agency
having jurisdiction. This generator is not intended to be used at a construction site or similar
activity as dened by NFPA 70-2020 (NEC) section 590.6.
To Restore Power Using Extension Cords

English Customer Service: 1-844-FIRMAN104
INTRODUCTION
1. Only use grounded cords marked for outdoor use rated for your loads.
2. Follow cord safety instructions.
3. Install carbon monoxide alarm(s).
DANGER! Engine exhaust contains carbon monoxide, a poisonous gas that will kill
you in minutes. You cannot smell it, see it, or taste it. Even if you do not smell exhaust
fumes, you could still be exposed to carbon monoxide gas.
● Extension cords running directly into the home increase your risk of carbon monoxide poisoning
through any openings.
● If an extension cord running directly into your home is used to power indoor items, the operator
recognizes that this increases the risk of CO poisoning to people inside the home and assumes that
risk.
Total
Amperage
Up to 13A
Up to 15A
Up to 20A
Up to 30A
Minimum Gauge, Outdoor Rated
Up to 50 FT (15m)
To provide power using
extension cords
16
14
12
10
4. When operating portable generator with extension cords, make sure portable generator is located
downwind in an open, outdoor area, at least 20 ft. (6 m) from occupied spaces with exhaust pointed
away.
5. Extension cords running directly into your home, powering indoor items IS NOT RECOMMENDED.

05English Customer Service: 1-844-FIRMAN1
1- Fixed Carrying Handle
2- Fuel Cap
3- Recoil Starter
4- Never Flat Wheel
5- Control Panel
6- Mufer/Spark Arrester
7- Folding Handle
8- Maintenance Cover – Oil ller and air lter access.
9- Data Decal / Serial Number
*We are always working to improve our products. Therefore, the enclosed product
may differ slightly from the image on this page.
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FEATURES, CONTROLS AND ON -PRODUCT HAZARD LABELS

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1
2
3
4
5
6
FEATURES, CONTROLS AND ON -PRODUCT HAZARD LABELS
LOCATION AND CONTENT OF NO-PRODUCT HAZARD LABELS
FREE WARNING LABEL REPLACEMENT
If hazard labels become illegible or are missing, contact FIRMAN customer service for a free
replacement.

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FEATURES, CONTROLS AND ON -PRODUCT HAZARD LABELS

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FEATURES, CONTROLS AND ON -PRODUCT HAZARD LABELS

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NOTICE
Total power drawn from all receptacles must not exceed the data decal rating.
1. Engine Start Switch – To start engine, press and hold the switch in the START (ll) position, the
engine will crank and attempt to start. When the engine starts, release the switch to the RUN (l)
position.
2. Economy Control Switch - The Economy Control switch can be activated in order to minimize fuel
consumption and noise while operating the unit during times of reduced electrical output, allowing
the engine speed to idle during periods of non-use. The engine speed returns to normal when an
electrical load is connected. When the economy switch is off, the engine runs at normal speed
continuously.
3. 3-1 Data-Minder (Multi-Meter) – Push the SELECT button to show the Voltage, Hertz and running
hours.
4. 120V, 20A Duplex - NEMA 5-20R (Not GFCI protected) A maximum of 20 Amps current may be
drawn from this duplex receptacle.
5. 120V, 30A RV – NEMA TT-30R A maximum of 27.5 Amps current may be drawn from this receptacle.
6. Output Ready Indicator Light – Remains “ON” during normal operating conditions. Shuts “OFF”
when generator is overloaded. The green AC Power Indicator Light comes on when the engine starts
and generates power.
7. Overload Indicator Light – This light turns “ON” when the generator is overloaded and will cut
power to the receptacles. If the engine overload indicator light comes on, the generator’s wattage /
amperage capacity has been exceeded by connected electrical devices or by a power surge. When
this occurs, the green AC Power Indicator Light will go off. The engine will continue to run, but the
red Engine Overload Indicator Light will stay on and power will no longer be supplied to connected
electronic devices.
Control Panel
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12
14
15
16
17
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19
11
10
9
5
6
7
8
1
2
3
4
FEATURES, CONTROLS AND ON -PRODUCT HAZARD LABELS

10English Customer Service: 1-844-FIRMAN1
8. Oil Warning Indicator Light – Check oil level when this light turns “ON”. Engine will not run when
indicator is lit. When the oil falls below the minimum level, the oil warning indicator light comes on
and the engine stops automatically. The engine will not start until the proper amount of oil is in the
crank case.
9. DC 5V 2.1A USB Outlet
10. Circuit Breakers – The receptacles are protected by AC circuit protectors. If the generator
is overloaded or an external short circuit occurs, a circuit protector may trip. If tripping occurs,
disconnect all electrical loads and determine the cause before attempting to continue using the
generator. Reset any tripped circuit protectors.If multiple receptacles are used at the same time, the
total current must be kept with-in the portable generator data decal rating.
11. 12V DC Battery Charger Port - Plug the 120 Volt AC charger into this port to charge the generator
battery.
12. DC Circuit Breaker – The DC receptacles are protected by an DC circuit protector. If the DC output
is overloaded or an external short circuit occurs the circuit protector will trip.
13. Parallel Operation Outlets - These outlets are used for connecting two FIRMAN inverter
generators for parallel operation. A FIRMAN parallel kit(optional equipment) is required for
parallel operation.
14. DC 12V Output - 8.3 Amps of DC current may be drawn from this receptacle. Use this outlet to
charge 12V automotive type batteries ONLY. See 12V DC outlet (Battery Charger) section.
15.Ground Terminal – Consult an electrician or authority having jurisdiction for local grounding
requirements.
16. Outlet Cover - Protect the receptacles from dust and debris.
17. Fuel Valve Knob
18. Choke Knob
19. Recoil Starter
20. CO Alert™ Carbon Monoxide (CO) Shutdown Indicator Light — Indicates the engine shutdown
due to carbon monoxide accumulation around the generator or a CO Alert system fault occurred.
FEATURES, CONTROLS AND ON -PRODUCT HAZARD LABELS

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OPERATION
English Customer Service: 1-844-FIRMAN1
1. Location
DANGER! Engine exhaust contains carbon monoxide, a poisonous gas that could
kill you in minutes. You CANNOT smell it, see it, or taste it. Even if you do not smell
exhaust fumes, you could still be exposed to carbon monoxide gas.
●
●Install battery-operated carbon monoxide alarms or plug-in carbon monoxide alarms with
battery back-up according to the manufacturer's instructions. Smoke alarms cannot detect
carbon monoxide gas.
●Do not run this portable generator inside homes, garages, basements, crawlspaces, sheds, or
other partially-enclosed spaces even if using fans or opening doors and windows for ventilation.
Carbon monoxide can quickly build up in these spaces and can linger for hours, even after this
product has shut off.
●If you start to feel sick, dizzy, weak or your home’s carbon monoxide alarm sounds, get to fresh air
right away. Call emergency services. You may have carbon monoxide poisoning.
Carbon Monoxide Alarm(s)
Install carbon monoxide alarms inside your home. Without working
carbon monoxide alarms, you will not realize you are getting sick and
dying from carbon monoxide poisoning.
Prevent Carbon Monoxide (CO) Poisoning
20 ft. (6 m) min.
To better educate yourself about all carbon monoxide risks, go to www.
takeyourgeneratoroutside.com.
Operate portable generator only outdoors and downwind at least 20 ft.(6 m) from occupied
spaces with exhaust pointed away to reduce the risk of carbon monoxide accumulating.
Use outdoors and downwind at least 20 ft. (6 m) from any home.
Point exhaust away from all homes and occupied spaces.
Install CO alarms inside your home.

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OPERATION
English Customer Service: 1-844-FIRMAN1
Reduce Risk of Fire
WARNING! Exhaust heat/gases could ignite combustibles, structures or damage
fuel tank causing a re, resulting in death or serious injury.
●Keep portable generator at least 5 ft. (1.5 m) from any structure, trees or vegetation over 12 in. (30
cm) in height.
●Select an outdoor site that is dry and protected from the weather. Do not move portable generator
indoors to protect it from the weather.
●Do not locate the portable generator under a deck or other similar structure that may conne heat
and airow.
5 ft.(1.5 m)
min.
5 ft.(1.5 m)
min.
20 ft.(6 m) min.

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OPERATION
English Customer Service: 1-844-FIRMAN1
Add Engine Oil
2. Oil and Gasoline
NOTICE Do not attempt to crank or start the engine before it has been properly filled with the
recommended type and amount of oil. Damage due to operation with no oil will void your warranty.
1.Place generator on a at, level surface.
2.Clean area around oil ll and remove yellow oil ll cap/dipstick.
3.Wipe dipstick clean.
Degrees Celsiusº(Outside)
Full Synthetic 5W-30
Degrees Fahrenheitº(Outside)
5W-30 10W-40
10W-30
(H)
DRAINPLUG
(L)
H
L
We recommend using SAE 10W-30 API SJ or higher oil for best performance. Do not use special
additives. Ambient temperature determines the proper oil viscosity for the engine. Use the chart
to select the proper oil for the outdoor temperature range expected.

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OPERATION
English Customer Service: 1-844-FIRMAN1
5. Using oil funnel, slowly pour contents of provided oil bottle into oil ll opening until oil reaches
upper limit "H" mark on the dipstick. Be careful not to overll. Overlling could cause engine
starting problems or engine damage.
6.Replace oil ll cap/dipstick and fully tighten.
7.Reinstall maintenance cover and tighten screws.
8.Oil level should be checked prior to each use or at least every 8 hours of operation. Keep oil
level maintained.
Low Oil Shutdown
The portable generator is equipped with a low oil shutdown. If the oil level drops below the
minimum required level, a sensor will activate an internal switch stopping the engine. If the
engine shuts off and the oil level is within specications, check to see if generator is sitting at an
angle. Place portable generator on an even surface to correct this. If engine fails to start, the oil
level may not be high enough to deactivate the internal low oil level switch. Make sure the sump is
completely full of oil to the upper limit (H). Do not operate engine until oil level issue is corrected.
Contact Firman customer service.
●Turn generator engine OFF and let it cool at least 2 minutes before removing fuel cap.
●Do Not refuel or move generator when engine is running.
●Move generator outdoors prior to adding or draining fuel
●Keep fuel away from any ignition sources.
●Do not overll tank, allow space for fuel expansion.
●If any fuel spills, wait until it evaporates before starting engine
●Check and replace fuel lines, tank, cap, and ttings prior to each use if any damage or leaks are
found.
Fuel must meet these requirements:
●Clean, fresh, unleaded gasoline with a minimum of 87 octane.
●For high altitude use, see Operation at High Altitude.
●Gasoline with no more than 10% ethanol is acceptable.
WARNING! Fuel and its vapors are extremely ammable which could cause burns or
re resulting in death or serious injury.
Add Gasoline
E10 E15

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OPERATION
English Customer Service: 1-844-FIRMAN1
NOTICE Do not mix oil in gasoline or modify engine to run on alternate fuels not described in this
manual. Use of unapproved fuels could damage engine and will not be covered under warranty.
1. Clean area around fuel ll cap, remove cap.
2. Slowly add unleaded fuel to fuel tank. Be careful not to ll above the RED fuel level indicator.
This allows adequate space for fuel expansion.
3.Install fuel cap and let any spilled fuel evaporate before starting engine.
Operation at High Altitude
At altitudes over 5,000 feet(1524 meters), a minimum 85 octane gasoline is acceptable.Engine power
and generator output will be reduced approximately 3.5% for every 1000 feet (305 m) of elevation
above sea level. High altitude may cause hard starting, increased fuel consumption and sparkplug
fouling. To operate at high altitudes FIRMAN can provide a high altitude carburetor main jet. The
alternative main jet and installation instructions can be obtained by contacting Customer Support.
NOTICE Operation using an alternative main jet at elevations lower than the recommended
minimum altitude can damage the engine. For operation at lower elevations, the standard main
jet supplied must be used. Operating the engine with the wrong main jet may increase exhaust
emissions, fuel consumption and reduce performance.
Operation at High Ambient conditions
Your Firman Power Equipment product is designed and rated for continuous operation at ambient
temperatures up to 104°F (40°C). The generator may be operated at temperatures ranging from
5°F(-15°C) to 122°F(50°C) for short periods. If the generator is exposed to temperatures outside
this range during storage, the generator should be brought back within this range before
operation. When operated above 77°F(25°C) there may be a decrease in power.
Maximum wattage and current are subject to and limited by such factors as ambient temperature,
altitude, engine conditions etc.
RedLineIndicator
Altitude main jet 1
Altitude main jet 2
193cc
333717002
333717003
Altitude
3000-6000Feet
6000-8000Feet

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OPERATION
English Customer Service: 1-844-FIRMAN1
1. Before starting the generator, check for loose or missing parts and for any damage which may have
occurred during shipment. Ensure spark plug, mufer, fuel cap, and air cleaner are all in place.
3. Disconnect all electrical loads from the generator. Never start or stop the generator with
electrical devices plugged in.
4. Turn the fuel valve to the “ON” (l)position.
5. Flip the engine switch to the "RUN"(l) position.
6. Flip the battery switch to the "ON"(l) position.
7. Pull the choke knob out to the “CHOKE” position.
3.Starting the Generator
2. Operate portable generator only outdoors and downwind at least 20 ft. (6 m) from occupied
spaces with exhaust pointed away to reduce the risk of carbon monoxide accumulating.

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OPERATION
English Customer Service: 1-844-FIRMAN1
8. For recoil start only-Pull the starter cord slowly until resistance is felt and then pull rapidly.
9. For electric start only-Flip the engine switch to the START (ll) position for a few seconds and then
release.
10. Push the choke knob to the “RUN” position.
11. Allow portable generator to run at no load for a few minutes to stabilize before plugging in
any electrical devices.
NOTICE If engine starts but fails to run, or if portable generator shuts down during operation,
check oil level. See Low Oil Shutdown section for more information.

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OPERATION
English Customer Service: 1-844-FIRMAN1
This portable generator has been pretested and adjusted to handle its full capacity. The voltage is
regulated using an automatic voltage regulator (AVR) . Readjusting the AVR will void warranty.
●Damaged or overloaded extension cords could overheat, arc, and burn resulting death or serious
injury.
●Use a ground fault circuit interrupter (GFCI) in any damp or highly conductive area, such as metal
decking.
●Do not touch bare wires or receptacles.
●Do not use generator with electrical cords which are worn, frayed, bare or otherwise damaged.
●Do not operate generator in the rain or wet weather.
●Do not run indoors to avoid wet conditions.
●Do not handle generator or electrical cords while standing in water, while barefoot, or while
hands or feet are wet.
1.Ensure circuit breaker on control panel is in the closed (on) position.
2. Start the generator with no electrical load attached.
3. Allow the engine to run for several minutes to stabilize.
4. Plug in and turn on the rst item. It is best to attach the item with the largest load rst.
5. Allow the engine to stabilize.
6. Plug in and turn on the next item.
7. Allow the engine to stabilize.
8. Repeat steps 5-6 for each additional item.
WARNING! Generator voltage could cause electrical shock or burn
resulting in death or serious injury.
4. Connecting Electrical Loads
Surge Protection
There is a remote chance that voltage fluctuations may impair the proper functioning of some
sensitive electronic equipment. Electronic devices, including computers and many programmable
appliances may use components that are designed to operate within a narrow voltage range and
may be affected by the portable generator’s momentary voltage uctuations. While there is no way
to prevent all voltage uctuations, you can take steps to protect your sensitive electronic equipment.
Install a plug-in surge suppressor on the receptacles feeding your sensitive equipment. Surge
suppressors come in single or multi-outlet styles. They are designed to protect against short duration
voltage uctuations.