Firman H05753 User manual

P/N:357745483 Rev:00
OWNER’S MANUAL
Read all safety precautions and instructions carefully
before operating equipment.
Ensure engine is stopped and level before performing
any maintenance or service.
IMPORTANT:
Record product information to reference when ordering parts or
obtaining warranty coverage.
Serial Number:
DUAL FUEL GENERATOR
MODEL NUMBER
H05753
Rev Level:00
DO NOT RETURN TO
STORE!
CALL US FIRST!
CUSTOMER HOTLINE
1-844-347-6261
FOR QUESTIONS OR SERVICE
INFORMATION
Purchase Date:

Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Safety Precautions . . . . . . . . . . . . . . . . . . . . .2
Unpacking the Generator. . . . . . . . . . . . . . . .6
Parts Included. . . . . . . . . . . . . . . . . . . . . . . .7
Removal of Shipping Supports . . . . . . . . . . . . 8
Assembly . . . . . . . . . . . . . .. . . . . . . . . . . . . . . 9
Install the Wheel Kit . . . . . . . . . . . . . . . . . . 9
Install the Support Leg. . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . 10
Controls and Features. . . . . . . . . . . . . . . . . 11
Generator. . . . . . . . . . . . .. . . . . . . . . . . . . .11
Control Panel. . . . . . . . . . . . . . . . . . . . . . . 12
Specifications. . . . . . . . . . . . . . . . . . . . . . . . 13
Add Engine Oil . . . . . . . . . . . . . . . . . . . . . .14
Low Oil Shutdown . . . . . . . . . . . . . . . . . . .14
Add Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Operation at High Altitude . . . . . . . . . . .17
Grounding. . . . .. . . . . . . . . . . . . . . .. . . . . .18
System.. . . . . . . . . . . . . . . . . . . . . . .. . . . . .18
Operation . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 19
Generator Location . . . . . . . . . . . . . . . . . . 19
Surge Protection . . . . . . . . . . . . .. . . . . . . .19
Connecting Electrical Loads . . . . . . . .. . . 24
Stopping the Engine . . . . . . . . . . . . . . . . . 24
Low Oil Shutdown . . . . . . . . . . . . . . . . . . 25
Do Not Overload Generator . . . . . . . . . . . 25
Introduction
Battery Cable Connection
Connecting to a Building’s Electrical
Maintenance And Storage. . . . . . . . . . . . . . 27
Maintenance Schedule . . . . . . . . . . . . . 27
Engine Maintenance .. . . . . . . . . . . .. . . . 28
Change Engine Oil . . .. . . . . . . . . . . . . . 28
Air Filter Maintenance. . . . . . . . . . . . . .28
Spark Plug Maintenance. . . . . . . . . . . . 29
Cleaning Fuel Strainer . . . . . . . . . . . . 29
. . . 29
Generator Maintenance . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . 30
Service and Storage . . . . . . . . . . . . . . . .. 31
Trouble Shooting . . . . . . . . . . . . . . . . . . . . .33
Parts Diagram and Parts List . . . . . . . . . . 34
Generator Parts Diagram . . . . . . . . . . . . 34
Engine Parts Diagram . . . . . . . . . .. . . . . 35
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 36
Service Information . . . . . . . . . . . . . .. . . . . 38
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Inspect Muffler and Spark Arrester
Battery Replacement
English Customer Service: 1-844-FIRMAN1
Starting the Generator (Recoil Start-Gasoline). . 20
Indicator light - Battery Power Saving Mode . . 25
Starting the Generator (Electric Start-LPG) .. 23
Starting the Generator (Recoil Start-LPG). . 20
Starting the Generator (Electric Start-Gasoline) .. 22

Thank you for purchasing a FIRMAN generator.
This manual covers operation and maintenance of the FIRMAN generators. 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 other wise improve the generator and this
documentation at any time without prior change.
Page 01
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 equipment.
Save these original instructions for future reference.
Important Safety Information
The manufacturer cannot possibly anticipate every possible circumstance that might involve a
hazard. The warnings in this manual and the tags and decals affixed to the unit are therefore not
all-inclusive. If you use a procedure, work method or operating technique that the manufacturer
does not specifically recommend you must satisfy yourself that it is safe for you and others. You
must also make sure that the procedure work method or operating technique that you choose
does not render the generator unsafe.
SAFETY INFORMATION
DANGER WARNING CAUTION
DANGER indicates a
potentially hazardous
situation which, if not
avoided. WILL result in
death or serious injury.
WARNING indicates a
potentially hazardous
situation which, if not
avoided, could result in
death or serious injury.
CAUTION indicates a
potentially hazardous
situation which, if not
avoided, may result in minor
or moderate personal injury,
or property damage.
Toxic Fumes
Fire Hazard
Hot Surface.
Do Not Touch the Surface.
Kickback
Risk of Electric Shock
Explosion Hazard
Rotating Parts Entanglement
Hazard
Operator’s Manual
INTRODUCTION
English Customer Service: 1-844-FIRMAN1

SAFETY PRECAUTIONS
Page 02
WARNING
POISONOUS GAS HAZARD.
•
•
•
•
WARNING
WARNING
•
English Customer Service: 1-844-FIRMAN1

Page 03
CORRECT USAGE
Example location to reduce risk of carbon monoxide poisoning
•ONLY use outside and downwind, far away from windows, doors and vents.
•Direct exhaust away from occupied spaces.
INCORRECT USAGE
Do not operate in any of the following locations:
Near any door, window or vent
Garage
Basement
Crawl Space
Living Area
Attic
Entry Way
Porch
Mudroom
English Customer Service: 1-844-FIRMAN1

Page 04
WHEN OPERATING EQUIPMENT
•
DO NOT tip engine or equipment at angle
which causes fuel or oil to spill.
DO NOT stop engine by moving choke
control to “Start” position.
•
•
WHEN TRANSPORTING, MOVING
OR REPAIRING EQUIPMENT
Transport/move/repair with fuel tank
EMPTY or with fuel shut OFF.valve
•
•DO NOT tip engine or equipment at angle
which causes fuel or oil to spill.
Disconnect spark plug wire.
•
WHEN STORING FUEL OR EQUIPMENT
WITH FUEL IN TANK
•
WARNING
•
•
WARNING
Generator voltage could cause
electrical shock or burn resulting
in death or serious injury.
•
WARNING
•
•NEVER start or stop engine with electrical
devices plugged in and turned on.
WARNING
Gasoline, gasoline vapors and liquid petroleum
gas(LPG) are extremely flammable and explosive
which could cause burns, fire, or explosion resulting
in death or serious injury and/or property damage.
WHEN ADDING OR DRAINING GASOLINE
Turn generator engine OFF and let it cool at
least 2 minutes before removing fuel cap.
Loosen cap slowly to relieve pressure in tank.
Fill or drain fuel tank outdoors.
•
•DO NOT overfill tank. Allow space for fuel
expansion.
If fuel spills, wait until it evaporates before
starting engine.
•
Keep fuel away from sparks, open flames,
pilot lights, heat, and other ignition sources.
Check fuel lines, tank, cap, and fittings
frequently for cracks or leaks. Replace if
necessary.
DO NOT light a cigarette or smoke.
•
•
•
•
WHEN STARTING EQUIPMENT
Ensure spark plug, muffler, fuel cap, and air
cleaner are in place.
•
DO NOT crank engine with spark plug
removed.
•Use approved transfer equipment, suitable
for the intended use, to prevent backfeed by
isolating generator from electric utility
workers.
English Customer Service: 1-844-FIRMAN1
Make certain that a LPG cylinder is not attached
to generator and is securely stowed away.
•
Do not store gasoline or LPG cylinder near
furnaces, water heaters, or any other appliances
that produce heat or have automatic ignitions.
•

Page 05
WARNING
Unintentional sparking
could cause fire or
electric shock resulting
in death or serious
injury.
WHEN ADJUSTING OR MAKING REPAIRS TO
YOUR GENERATOR
Disconnect the spark plug wire from the
spark plug and place the wire where it cannot
contact spark plug.
•
WHEN TESTING FOR ENGINE SPARK
Use approved spark plug tester.
•DO NOT check for spark with spark plug
removed.
•
WARNING
NEVER operate generator without protective
housing or covers.
DO NOT wear loose clothing, jewelry or
anything that could be caught in the starter
or other rotating parts.
Tie up long hair and remove jewelry.
•
•
•
•
•
DO NOT exceed the generator’s wattage
amperage capacity.
Start generator and let engine stabilize
before connecting electrical loads.
NOTE:
•
•
•
•
CAUTION
Exceeding generators wattage/amperage capacity
could damage generator and/or electrical devices
connected to it.
Connect electrical loads in OFF position,
then turn ON for operation.
Turn electrical loads OFF and disconnect
from generator before stopping generator.
•
•
•
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 handle generator or electrical
cords while standing in water, while
barefoot, or while hands or feet are wet.
DO NOT allow unqualified persons or
children to operate or service generator.
•
WARNING
Exhaust heat/gases could ignite combustibles,
structures or damage fuel tank causing a fire,
resulting in death or serious injury and/or
property damage.
Contact with muffler area could cause burns
resulting in serious injury.
DO NOT touch hot parts and AVOID hot
exhaust gases.
Allow equipment to cool before touching.
It is a violation of California Public Resource
Code, Section 4442, to use or operate the
engine on any forest-covered, brush-covered,
or grass-covered land unless the exhaust
system is equipped with a spark arrester, as
defined in Section 4442, maintained in
effective working order. Other states or
federal jurisdictions may have similar laws.
Contact the original equipment manufacturer,
retailer, or dealer to obtain a spark arrester
designed for the exhaust system installed on
this engine.
Replacement parts must be the same and
installed in the same position as the original
parts.
•
•
•
•
When using generator for backup power,
notify utility company.
Use a ground fault circuit interrupter (GFCI)
in any damp or highly conductive area,
such as metal decking or steel work.
DO NOT touch bare wires or receptacles.
•
•
•
English Customer Service: 1-844-FIRMAN1

Page 06
•
•
•
•
•
Use generator only for intended uses.
If you have questions about intended use,
ask dealer or contact local service center.
Operate generator only on level surfaces.
DO NOT expose generator to excessive
moisture, dust, dirt, or corrosive vapors.
DO NOT insert any objects through cooling
slots.
If connected devices overheat, turn them off
and disconnect them from generator.
Shut off generator if:
-Electrical output is lost.
-Equipment sparks, smokes, or emits flames.
-Unit vibrates excessively.
•
•
WARNING
Medical and Life Support Uses.
In case of emergency, call 911 immediately.
NEVER use this product to power life support
devices or life support appliances.
NEVER use this product to power medical
devices or medical appliances.
Inform your electricity provider immediately
if you or anyone in your household depends
on electrical equipment to live.
Inform your electrical provider immediately
if a loss of power would cause you or anyone
in your household to experience a medical
emergency.
•
•
•
•
•
NOTE:
Improper treatment of generator could damage
it and shorten its life.
English Customer Service: 1-844-FIRMAN1
Fuel Safety
DANGER
GASOLINE AND GASOLINE VAPORS ARE HIGHLY
FLAMMABLE AND EXPLOSIVE.
Fire or explosion can cause severe burns or death.
Unintentional startup can result in entanglement,
traumatic amputation or laceration.
Gasoline expands or contracts with ambient
temperatures. Never fill the gasoline tank to
full capacity, as gasoline needs room to expand
if temperatures rise.
Gasoline can cause a fire or explosion if ignited.
Gasoline is a liquid fuel but it’s vapors can ignite.
•
•
•Gasoline is a skin irritant and needs to be cleaned
up immediately if spilled on skin or clothes.
•Gasoline has a distinctive odor, this will help
detect potential leaks quickly.
•In any gasoline fire, flames should not be
extinguished unless by doing so the fuel supply
valve can be turned OFF. This is because if a fire is
extinguished and a supply of fuel is not turned OFF,
then an explosion hazard could be created.
•
Liquid Petroleum Gas (LPG/Propane):
This generator is dual fuel and capable of running
with both gasoline and Liquid Petroleum Gas
(LPG/Propane).
•
If you smell gas: close off the gas supply. Make
sure there is no leak before using the generator.
•
•
•
•
•
•
Gasoline:
Liquid Petroleum Gas (LPG) is highly flammable
and explosive. Fire or explosion can cause severe
burns or death.
Do not use or store LPG cylinder in a building,
garage or enclosed area.
Do not check for leaks with a lighted match or
flame.
The LPG cylinder valve should be fully closed
when the generator is not in use or is running
with gasoline.
DANGER
WARNING
Device used for handling LPG must be installed
and used in strict conformance with NFPA 58
(Liquefied Petroleum Gas Code) and NFPA 54
(National Fuel Gas) and all other codes, regulations
and manufacturer recommendations.
Never use a gas container, LPG connector
hose, LPG cylinder or any other fuel item that
is damaged or appears damaged.
The LPG cylinder valve should be fully closed
when the generator is not in use or is running
with gasoline.
•
•The regulator/hose assembly and cylinder
valve must be inspected before each use for
leaks or sign of damages.

Page 07
English Customer Service: 1-844-FIRMAN1
UNPACKING THE GENERATOR
•
•
Parts Included
Your gasoline powered generator ships with
the following parts:
1. Axle pin . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2. 10.0" in. Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Flat Washer. . . . . . . . . . . . . . . .. . . . . . . . . . . . . .2
4. Cotter pin. . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .2
5. Engine Oil(Bottle) . . . .. . . . . . . . . . . . . . . . . . . .1
6. Oil Funnel . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 1
7. Wrench for Spark plug . . . . . . . . . . . . . . . . . . .1
8. Double Open wrench (10mm & 12mm). . . . 2
9. Support Leg with Vibration Mounts . . . . . . 1
10. Flange Bolt (M8x16 for Support Leg) . . . . . 2
11. Flange Lock Nut (M8) . . . . . . . . . . . . . . . . . . . 4
12. Flange Bolt M6X25. . . . . . . . . . . . . . . . . . . . . .2
13. Rubber Support
15. Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 1
16.
17. Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
18. Quick Reference Guide . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . .2
14. Flange Lock Nut (M6) . . . . . . . . . . . . . . . . . . . 4
LPG Hose With Regulator 5 ft. (1.5 m) . . . 1
If you smell gas: close off the gas supply. Spray
a soapy water solution to check all connections
for leaks before attempting to use generator.
Contact a qualified technician to inspect and
repair the LPG system if a leak found before
using the generator.
•
CAUTION
LPG under pressure is highly flammable and
can cause a fire or explosion if ignited.
LPG is heavier than air and can accumulate in
confined spaces and low places in the event
of a leak.
LPG has a distinctive odor to help detect
potential leaks.
Do not allow children to tamper or play with
the LPG cylinder.
In the event of an LPG fire, flames should not
be extinguished unless by doing so the fuel
supply valve can be turned off. If the fire is
extinguished and a supply of fuel is not turned
off, an explosion hazard greater than the fire
hazard could be created.
Keep a fire extinguisher near the generator all
the time.
Always keep the LPG cylinder in an upright
position.
Do not subject LPG cylinder to excessive heat.
Contact with liquid contents of the cylinder
will cause freeze burns to the skin.
An LPG cylinder not connected for use shall
not be stored in the vicinity of the generator.
When transporting and storing, turn off the
cylinder valve and fuel selector switch, and
disconnect the cylinder.
•
•
•
•
•
•
•
•
•
•
•
10
11
12
13
14
15
16
17
18

Page 08
English Customer Service: 1-844-FIRMAN1
Install the Wheel Kit
The wheel kit is not intended for over-the-road
use.
Install the Support Leg
ASSEMBLY
A
B
C
The generator requires some assembly prior to
usage. If problems arise when assembling the
generator, call 1-844-347-6261.
1. Before adding wheels, tip the generator on
its side.
2. Slide the axle pin A through the wheel B.
3. Slide the axle pin A through the mount point
on the frame and flat washer D.
4. Secure the wheel and axle pin with the cotter
pin C.
5. Repeat steps 2-4 to attach another wheel.
3. Tip the generator slowly so that it rests on the
wheels and support leg.
4. Tighten bolt E and nut F with provide wrenches.
CAUTION
D
2. Attach the support leg (G) to the generator
frame with flange bolt (E) (M8X16) and flange
lock nut(F) (M8).
1. Attach the rubber support (H) to the support
leg (G) with flange bolt (I) (M6X25) and flange
lock nut(J) (M6).

Page 09
English Customer Service: 1-844-FIRMAN1
Battery Cable Connection
You will need to use 8mm box wrenches to connect the battery cables to battery.
NOTE:
The generator comes equiped with the positive red cable(red cable) already attached.
1. Verify the positive (+) battery cable (red boot) is securely tightened to the positive (+) battery
post. Make sure boot is over battery post.
2. Remove bolt M5X12 and M5 nut from black cable ring.
3. Remove vinyl cap from the negative(-) battery post. Locate negative (-) black cable and route
to the negative(-) battery post. Tight the cable with bolt M5X12 and M5 nut. Cover the post with
black boot.
M5X12
M5
Black Cable
Ring
Black Boot
Red Cable(+)
Black Cable(-) -+

Page 10
CONTROLS AND FEATURES
Generator
1- Fuel Gauge
2- 8.0 Gallon Capacity Fuel Tank
3- Fuel Cap
4- Choke Lever(behind air filter box)
5- Air Filter
6- 439cc FIRMAN OHV Engine
7- Recoil Starter
8-
9-
10-
11-
12-
13-
10.0" Flat Free Wheel
Oil Filler Cap
Battery
Outlet Cover
Control Panel
Handle
14- LPG Hose Connector(Inlet)
English Customer Service: 1-844-FIRMAN1
*We are always working to improve our products. Therefore, the enclosed product may differ
slightly from the image on this page.
2①
②
③
⑤
⑥
⑦⑧⑨⑩
⑪
⑫
④⑬
⑭

2
3
4
Page 11
NOTE: Total power drawn from all receptacles must not exceed the name plate rating.
Engine Start Switch – Used to start engine
from the starter motor(Electric start model
only). 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.
Control Panel
English Customer Service: 1-844-FIRMAN1
1
3-1 Data-Minder(Multi-Meter) – Push the
SELECT button to show the Voltage, Hertz
and running hours.
5
6
120V, 30A Twist-Lock (NEMA L5-30R) –
Maximum full load 30 Amp current may be
drawn from this 120 Volt receptacle.
7
8
Indicator Light
When the fuel selector switch is turned to the
“GAS” or “LPG” position, the indicator light will
become RED up to 4 minutes(before goes off).
Starting the engine successfully during these
4 minutes will turn the indicator light GREEN.
MUST HAVE SOLID RED INDICATOR LIGHT
TO BE ABLE TO START THE GENERATOR. THE
GENERATOR CANNOT BE STARTED DURING
BATTERY POWER SAVING MODE UNLESS
THE FUEL SELECTOR SWITCH IS TURNED TO
THE “OFF” POSITION AND THEN TURNED
BACK TO THE “GAS” OR “LPG” POSITION.
See Indicator light-Battery power Saving
Mode section for more information.
34
2
1
5
5
6
7
8
9
10
120V, 20A Duplex – (NEMA 5-20R)
This receptacle is rated so that a total of 20 amps
may be drawn regardless of whether both halves or
just one receptacle is used.
Ground Terminal – Consult an electrician
for local grounding regulations.
Fuel Selector Switch – Use to select and turn
on gasoline or LPG fuel source. Fuel (gasoline)
valve is closed when the switch is on “OFF” or
“LPG” positions. Engine switch is on when the
switch is on “GAS” or “LPG” positions.
11

Page 12
English Customer Service: 1-844-FIRMAN1
9
10
11
Outlet Cover - Protect the receptacles from
dust and debris.
LPG Hose Connector(Inlet) – Used to connect
LPG hose to generator.
120/240V, 30A Twist-Lock – (NEMA L14-30R)
Maximum 30 Amp current maybe drawn from
this 120/240 Volt receptacle.

Page 13
SPECIFICATIONS
Model
Rated AC Voltage
Phase
Power Factor
Voltage Regulator
Alternator Type
Running Watts
Starting Watts
Engine
Engine Type
Displacement
Low Oil Shutdown
Ignition System
Starting System
Fuel
Capacity Fuel Tank
Lubricating Oil Capacity
Carburetor Type
Air Cleaner
P.T.O. Shaft Rotation
120/240V
H05753
7125(GAS )/7125(LPG)OLINE
AVR
Single
1
Single Cylinder, 4-Stroke OHV Air Cooled
439cc
Breakless Ignition Type, Flywheel Magneto
Unleaded Automotive Gasoline/LPG
8.0 Gallon
37.2 oz(1.1L)
Counter Clockwise (Facing P.T.O.)
Float
Brushed
Polyurethane Type
Yes
5700(GASOLINE)/5700(LPG)
FIRMAN
Rated Fequency 60Hz
Oil Type
See “Add Engine Oil” Section
Spark Plug
AN IMPORTANT MESSAGE ABOUT TEMPERATURE:
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 fuel BTU content
ambient temperature, altitude, engine condition and etc. Maximum power decreases about
3.5% for each 1,000 feet above sea level; and will also decrease about 1% for each 10°F(6°C)
above 60°F(16°C) ambient temperature.
•
•
TORCH F6RTC/NGK BPR6ES/CHAMPION RN9YC
Recoil/Electric Start
English Customer Service: 1-844-FIRMAN1

ADD ENGINE OIL
Page 14
1.Place generator on a flat, level surface.
2.Clean area around oil fill and remove yellow
oil fill cap/dipstick.
3.Wipe dipstick clean.
NOTE:
The engine is equipped with a low oil shut-off and
will stop when the oil level in the crankcase falls
below the threshold level.
NOTE:
We consider the first 5 hours of run time to be
the break-in period for the unit. During the break
in period stay at or below 50% of the running
watt rating and vary the load occasionally to allow
stator windings to heat and cool. Adjusting the
load will also cause engine speed to vary and help
seat piston rings.
CAUTION
The unit is equipped with a low oil shutdown.If
the oil level becomes lower than required,the
sensor will activate a warning device or stop the
engine.
If generator shuts off and the oil level is within
specifications, check to see if generator is sitting
at an angle that forces oil to shift. Place on an
even surface to correct this. If engine fails to
start, the oil level may not be sufficient to
deactivate low oil level switch. Make sure the
sump is completely full of oil.
(H)
DRAIN PLUG
(L)
5.Replace oil fill cap/dipstick and fully tighten.
6.Oil level should be checked prior to each use
or at least every 8 hours of operation. Keep oil
level maintained.
4.Using oil funnel, slowly pour contents of
provided oil bottle into oil fill opening to the
"H" mark on dipstick. Be careful do not
overfill. Overfilling with oil could cause the
engine to not start or hard starting.
Low Oil Shutdown
Degrees Celsiusº(Outside)
Full Synthetic 5W-30
Degrees Fahrenheitº(Outside)
5W-30 10W-40
10W-30
CAUTION
H
L
English Customer Service: 1-844-FIRMAN1

ADD FUEL
Page 15
Fuel must meet these requirements:
•Clean, fresh, unleaded gasoline.
Use regular UNLEADED gasoline with the
generator engine with a minimum 87 octane
/ 87 AKI (91 RON).
For high altitude use, see "Operation at High
Altitude".
Do not use gasoline with more than 10%
alcohol such as E85 or ethanol.
•
•
Failure to follow Operator's Manual for fuel
recommendations voids warranty.
Avoid generator damage.
DO NOT use unapproved gasoline such as E85.
DO NOT mix oil in gasoline.
DO NOT modify engine to run on alternate fuels.
•
•
•
WARNING
Fuel and its vapors are extremely flammable
and explosive which could cause burns, fire or
explosion resulting in death, serious injury
and/or property damage.
Fill fuel tank outdoors.
DO NOT overfill tank. Allow space for fuel
expansion. If the tank is overfilled, fuel
can overflow onto a hot engine and cause fire
or explosion. Wipe up any spilled fuel
immediately.
If fuel spills, wait until it evaporates before
starting engine.
Keep fuel away from sparks, open flames,
pilot lights, heat, and other ignition sources.
Check fuel lines, tank, cap and fittings
frequently for cracks or leaks. Replace if
necessary.
DO NOT light a cigarette or smoke when
filling the fuel tank.
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1.Clean area around fuel fill cap, remove cap.
2.Slowly add unleaded fuel to fuel tank. Be
careful not to fill 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 or wipe up
any spilled gasoline.
CAUTION
Slowly add unleaded gasoline to fuel tank.
Do not overfill tank.
Do not fill above the red line indicator.
This will allow expansion in hot weather
and prevent overflow.
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English Customer Service: 1-844-FIRMAN1
Red Line Indicator
1.Gasoline
2-Connecting Liquid Petroleum Gas
(LPG/Propane) Cylinder
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Liquid Petroleum Gas (LPG) is highly flammable
and explosive. Fire or explosion can cause severe
burns or death.
Do not use or store LPG cylinder in a building,
garage or enclosed area.
DANGER
•Do not place the LPG cylinder in the path of
muffler outlet.
IMPORTANT: It is important to prevent gum
deposits from forming in fuel system parts such
as the carburetor, fuel hose or tank during storage.
Alcohol-blended fuels (called gasohol, ethanol
or methanol) can attract moisture, which leads to
separation and formation of acids during storage.
Acidic gas can damage the fuel system of an engine
while in storage. To avoid engine problems, the
fuel system should be emptied before storage of
30 days or longer. See the " Long Term Storage"
section. Never use engine or carburetor cleaner
products in the fuel tank as permanent damage
may occur.

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English Customer Service: 1-844-FIRMAN1
•Never use a gas container, LPG connector
hose, LPG cylinder or any other fuel item that
is damaged or appears damaged.
The LPG cylinder valve should be fully closed
when the generator is not in use or is running
with gasoline.
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•The regulator/hose assembly and cylinder
valve must be inspected before each use for
leaks or sign of damages.
Use only 20 or 30 lb capacity cylinders with
Type 1, right hand Acme threads with this
generator. Verify the re-qualification date
on the 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 your propane gas supplier.
Do not connect or disconnect the LPG cylinder
in enclosed area.
Do not install or replace the LPG cylinder near
open flames, pilot lights, or sparking electrical
equipment such as power tools, welders and
grinders.
Attach the LPG regulator/hose assembly
(included) to the LPG hose connector (inlet)
on the control panel of the generator. Tighten
the nut with 19 mm or adjustable wrench.
Remove the safety plug or cap from the
cylinder valve.
Attach the other end of the LPG regulator/hose
assembly to the cylinder valve. Tighten the nut
by hand clockwise to a positive stop. Do not
use a wrench to tighten. Use of wrench may
damage quick closing coupling nut and result
in a hazardous condition.
Do not use tape or any type sealant to seal the
LPG hose connections.
Always position the cylinder so the connection
between the valve and the regulator won’t cause
bends or kinks in the hose.
Spray a soapy water solution (one part liquid
detergent and one part water) to check all
connections for leaks before attempting to
use generator. Slowly open the cylinder valve.
A leak exists if bubbles appear or grow larger
in size or number. This must be corrected before
using the generator. Contact your local
Authorized Service Facility for assistance. Do
not attempt to make repairs yourself.
Do not check for leaks with a lighted match
or flame.
Do not light or smoke cigarettes.
Check the fuel system periodically for leaks
or signs of damages.
LPG under pressure is highly flammable and
can cause a fire or explosion if ignited.
CAUTION
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LPG is heavier than air and can accumulate in
confined spaces and low places in the event
of a leak.
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If you smell gas: close off the gas supply. Spray
a soapy water solution to check all connections
for leaks before attempting to use generator.
Contact a qualified technician to inspect and
repair the LPG system if a leak found before
using the generator.
•You must use the supplied regulator/hose
assembly for safe operation.
•WARNING
Device used for handling LPG must be installed
and used in strict conformance with NFPA 58
(Liquefied Petroleum Gas Code) and NFPA 54
(National Fuel Gas) and all other codes, regulations
and manufacturer recommendations.
If you smell gas: close off the gas supply. Make
sure there is no leak before using the generator.
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Do not check for leaks with a lighted match or
flame.
The LPG cylinder valve should be fully closed
when the generator is not in use or is running
with gasoline.

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English Customer Service: 1-844-FIRMAN1
3-Permanent Connection to a large
Propane supply tank:
In the instance that you would need to connect
your generator to a large propane Supply tank,
larger than 20 or 30 lb DOT cylinder, it is
recommended to contact your Gas Equipment
Company. Various equipment for use with LPG,
is required for proper conformance to all NFPA
regulations. Your Gas Equipment Company can
help you select and install the proper regulator,
fittings and connections to meet all the Codes
and manufacturer regulations. Each installation
may be different and will required proper equipment.
Contact your Gas Equipment Company to assure
that you are meeting all NFPA 58 (Liquefied
Petroleum Gas Code) and NFPA 54 (National Fuel
Gas) Codes.
Operation at High Altitude
At altitudes over 5,000 feet(1524 meters), a
minimum 85 octane / 85 AKI (89 RON) gasoline
is acceptable.
The density of air at high altitude is lower
than at sea level. Engine power is reduced
as the air mass and air-fuel ratio decrease.
Engine power and generator output will be
reduced approximately 3.5% for every 1000 feet
of elevation above sea level. This is a
natural trend and cannot be changed by
adjusting the engine. At high altitudes
increased exhaust emissions can also result
due to the increased enrichment of the air
fuel ratio.
Other high altitude issues can include hard
starting, increased fuel consumption and
spa rk p lug f ou lin g. T o al lev iat e hi g h
al titude issues other than the na tural
power loss, FIRMAN can provide a high
altitude carburetor main jet. The alternative
The part number and recommended minimum
altitude for the application of the high
altitude carburetor main jet is listed in the
table below.
main jet and installation instructions can be
obtained by contacting Customer Support.
Installation instructions are also available in the
Technical Bulletin area of the FIRMAN internet site.
Altitude main jet 1
Altitude main jet 2
439cc
380717004
380717005
Altitude
3000-6000Feet
6000-8000Feet
OPEN
WARNING
When transporting and storing, turn off the
cylinder valve and fuel selector switch, and
disconnect the cylinder.
Contact with liquid contents of the cylinder
will cause freeze burns to the skin.
•
An LPG cylinder not connected for use shall
not be stored in the vicinity of the generator.
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•
•Always keep the LPG cylinder in an upright
position.
Do not subject LPG cylinder to excessive heat.
•
In the event of an LPG fire, flames should not
be extinguished unless by doing so the fuel
supply valve can be turned off. If the fire is
extinguished and a supply of fuel is not turned
off, an explosion hazard greater than the fire
•
hazard could be created.
•Keep a fire extinguisher near the generator
all the time.
LPG has a distinctive odor to help detect
potential leaks.
•
Do not allow children to tamper or play with
the LPG cylinder.
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Page 18
Grounding
The National Electric Code requires your generator
must be properly connected to an appropriate
ground to help prevent electric shock.
Failure to properly ground the
generator can result in electric
shock.
WARNING
THERE IS A PERMANENT CONDUCTOR BETWEEN
THE GENERATOR (STATOR WINDING) AND THE
FRAME.
Use approved transfer equipment to prevent
backfeed by isolating generator from electric
utility workers.
When using generator for backup power, notify
utility company.
Use a ground fault circuit interrupter (GFCI) in
any damp or highly conductive area, such as
metal decking or steel work.
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 handle generator or electrical cords
while standing in water, while barefoot, or
while hands or feet are wet.
DO NOT allow unqualified persons or children
to operate or service generator.
Connecting to a Building's Electrical System
WARNING
Generator voltage could cause
electrical shock or burn resulting
in death or serious injury.
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English Customer Service: 1-844-FIRMAN1