FIRMAN HO3651 4550W/3650W Electric Start Dual Fuel Gas/LPG Generator 120v

Ready for any task, the H03651 Hybrid Dual Fuel Portable generator provides power on demand. Great for for camping, emergency power, work-site and great outdoors.

California Emissions Certified


The FIRMAN H03651 is an electric start model featuring 4550 starting watts and 3650 running watts. Our Max Pro Series 208cc engine runs cool and efficient thanks to its Phoenix Fat Head Block. Running at 67 dB, the H03651 has a 5gal tank that will run for 14hrs and is California and Canada emissions certified. All Hybrid Series run on gas or propane, giving you flexibility. The H03651 has a 5.5ft propane hose for convenience using larger propane tanks and includes a 8” wheel-kit and folding handle. Easy information is at your fingertips with a 3-in-1 data minder measuring Hrs, Volts, and Hertz.

Note: Everything you need is in the box including: oil, funnel, owner’s manual, and spark plug wrench.


  • 4550 Starting Watts / 3650 Running Watts – Gas
  • 4100 Starting Watts / 3300 Running Watts – LPG
  • 208cc Dual Fuel engine with low oil shut off and cast iron sleeve
  • 5gal gas tank provides up to 14hrs of run-time (Propane tank not included)
  • Run time using a full 20lb propane cylinder 11 hours at 50% load
  • RV ready control panel with covered outlets
  • 8″ Heavy Duty Wheels and High Folding Handle
  • Outlets:
    • (2) 5-20R 20A-120V
    • (1) TT-30R 30A-120V RV Ready
    • (1) L5-30R 30A-120V TWISTLOCK
  • Durable compact tubular roll cage frame design
  • Weight: 135.5 Lbs
  • Carton Measurements: 27.6″ x 18.1″ x 20.5″
  • 3 Year Warranty



HO3651 User Manual.pdf

HO3651 Model Sheet.pdf

Running (RATED) Watts – Gas3650
Starting (SURGE) Watts – Gas4550
Running (RATED) Watts – LP3300
Starting (SURGE) Watts – LP4100
AC Voltage (VOLTS)120
Frequency (Hz)60
Engine Displacement (cc)208
Recoil StartYES
Electric StartYES
Low Oil Shut OffYES
Power Stream AlternatorYES
Cast Iron SleeveYES
FuelGas / LPG
Propane Hose5.5ft
Excitation SystemBrushed
THD@Full Load25
Runtime @ 50% LOAD14
dB @ 7m @ 3/4 LOAD75
5-20R 120V 20A Duplex2
L5-30R 120V 30A Twistlock1
TT-30R 120V 30A RV1
Outlet CoverYES
Engine ON/OFF SwitchYES (Push Button)
Phoenix Fat Head BlockYES
Fuel SelectorYES
Tank Size (Gallon/Litre)5.0/19.0
Fuel Gauge on CapYES
Wheel(Size/Type/Color)8.0″ -Black -Plastic -Flat Free
HandleU-Shaped Padded Handle
Foot BracketHat Shape w/ 2xRubber Isolator
USDA FS Certified Spark ArresterYES
Engine Oil (Bottle)YES
Oil FunnelYES
Tool KitSP wrench – 2xOpen Wrench 10×12
LPG Regulator (1.5m)YES
Volt Lock Automatic Voltage Regulator (AVR)YES

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