I recently purchased a 1998 Gulfstream Ultra, and the seller told me he was warned to keep the fuel tank above half full to avoid losing the fuel supply to the generator. I previously owned an older class A, and I could actually see where the generator fuel supply line entered the gas tank, which was only a few inches from the bottom. The older class A also had two fuel tanks. On this class C, the fuel line enters the top of the tank and therefore there's no way to know how low the tank level can be drawn before the genny no longer has a fuel supply.Any experience or thoughts as to how low the fuel tank level can go before the generator loses it's supply?

My understanding is that the generator fuel tube will suck air at about the 1/4 full point.

Generally between 1/4 and 1/3 of a tank fuel remaining. Mine is actually less than 1/4 because the line was replaced by previous owner. I never ran it much below a 1/4 but I tested it once when near empty and the genny wouldn't start.

I was told 1/4 tank, so that you would have some fuel to make it to a gas station. But your right about the fuel level guessing game.. My tube goes in near the top of tank and I hope they put somewhere near a 1/4. You do bring up good point of wanting to know for sure. I've been thinking about waiting till gas gauge gets little above 1/4 and run the gen (at home) to see exactly where gen runs out of fuel. I do know my gen averages 80% of gallon per hour.

I've allowed my main gas tank on my 2008 Tioga to drop down to 1/4 tank several times. Each and every time, I had the generator running, and exactly on time, it died when it could no longer suck gas below the 1/4 tank mark.

If the Generator stops running and will not start again, and your tank is at 1/4 tank, go get gas.

Generator Fuel Level | Good Sam Community

WidowsSon
Explorer
Jul 31, 2014
If the Generator stops running and will not start again, and your tank is at 1/4 tank, go get gas.
cgmartine
Explorer
Jul 31, 2014
I've allowed my main gas tank on my 2008 Tioga to drop down to 1/4 tank several times. Each and every time, I had the generator running, and exactly on time, it died when it could no longer suck gas below the 1/4 tank mark.
path1
Explorer
Jul 31, 2014
I was told 1/4 tank, so that you would have some fuel to make it to a gas station. But your right about the fuel level guessing game.. My tube goes in near the top of tank and I hope they put somewhere near a 1/4.

You do bring up good point of wanting to know for sure.

I've been thinking about waiting till gas gauge gets little above 1/4 and run the gen (at home) to see exactly where gen runs out of fuel.

I do know my gen averages 80% of gallon per hour.
Cousin_Eddie93
Explorer
Jul 31, 2014
Generally between 1/4 and 1/3 of a tank fuel remaining. Mine is actually less than 1/4 because the line was replaced by previous owner. I never ran it much below a 1/4 but I tested it once when near empty and the genny wouldn't start.
CloudDriver
Explorer
Jul 31, 2014
My understanding is that the generator fuel tube will suck air at about the 1/4 full point.

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