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The Firman H03655 is a portable dual-fuel generator that runs on gasoline or propane. On gas it delivers 4550 starting watts and 3650 running watts; on propane, 4100 and 3300. Its 5-gallon tank runs up to 14 hours at half load, and it includes a TT-30R 30A outlet for RV hookups plus built-in carbon monoxide detection. It sits in the mid-size class against dual-fuel rivals like the Champion 3400-Watt and Westinghouse iGen4500DF: those are quieter and lighter, while the Firman leans on simple, proven construction and a lower entry point. It suits RVers, campers and homeowners who want backup power without paying for inverter-grade electronics.
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Lowest price we've seen: $599.99 on Nov 10 at JB Tools. Tracked across 1 store since Nov 10.
Owners generally find the H03655 reliable for RV trips and short outages, and they value the dual-fuel option and CO shutdown. The main complaints are noise and the pull-start effort, especially for older users.
The Firman H03655 is a portable generator that runs on either gasoline or propane. It has a 208cc Firman OHV engine with a cast iron sleeve and a heavy-duty steel frame.
On gasoline it produces 4,550 starting watts and 3,650 running watts. On propane (LPG) it produces 4,100 starting watts and 3,300 running watts. The 5-gallon tank runs up to 14 hours at 50% load, and the generator operates at 67 dB at 50% load.
It has an RV-ready TT-30R 120V 30A outlet and a built-in CO Alert carbon monoxide detection system.
