Richard Marula wrote:I recently (January 2021) purchased a generator to address my wife's concerns for backup power. After looking at some that were available and thinking of issues I have had with my riding mower I selected one that is dual fuel (gasoline and LPG/propane) and that has a manual rope pull starter (along with the pushbutton electric start). Gasoline goes bad while stored , especially if it has ethanol mixed into it and batteries lose their charge while sitting for months on end.
We purchased a Firman model #HO7552 .
It has the following ratings: Starting Watts 9400(gasoline)/8450(LPG) ; Running Watts 7500(gasoline)/6750(LPG) ; Rated AC Voltage 120/240V ; Rated Frequency 60Hz ; Engine Displacement 439cc; I do not find any horsepower ratings which would also vary depending on gasoline or LPG. Price was $850.00 US.
I never intend to put a drop of gasoline in this thing and will only run it on LPG. This way the fuel system will not be destroyed by the cheap ethanol gas that is sold at the pump. Pure gasoline is available at the hardware store but that is $5 per quart or $20 per gallon. So I have propane cylinders lined up ready to use. They can sit for years without the propane going bad.
The manual rope pull starter was deemed essential because when it is time to run the generator it will be because there is a blackout since the power is out and that means I cannot plug in my battery charger and charge up the battery to start it with the pushbutton electric start! My riding mower has left me stranded due to no manual rope pull start.
Looking at the picture in the above post I see that your conversion kit looks just like the LPG fuel control system on the Firman generator I have.
At my house I do have Natural Gas plumbed in from the local utility company. I would like to run the generator on the Natural Gas instead of the LPG/Propane since it would be an unlimited fuel supply. Then save the LPG cylinders for a catastrophe when both electricity and Natural Gas were not being supplied by the utility company.
Does anyone know what changes would be required to run this unit on Natural Gas? Is there another conversion kit for Natural Gas?
I will mention that Firman does offer different main jets for the carburetor for gasoline operation at different elevations. Standard Main Jet for sea level to 3000 feet ; Altitude Main Jet #1 for 3000-6000 feet ; Altitude Main Jet #2 for 6000-8000 feet.
Richard Marula wrote:I gave the Firman Helpline a call and talked with Christopher. I let him know I have one of their dual-fuel Gasoline or LPG generators. I asked if they offer a conversion kit to Natural Gas. They do not offer a conversion kit. He said that the Natural Gas burns hotter so he did not think they would be offering one in the future either. Has anyone experienced high temperature issues or engine damage due to high temperatures from using Natural Gas?
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