Welcome to the forum ... Can't tell you what's the problem, but here's how to fix it. Since it is a heat related problem... An engine needs only three things to run, air, fuel and ignition. Obviously, they have to be in the proper amounts and at the proper time. Air: Might a hose or structure soften and collapse when heated? This could cause an increase in vacuum that might suck oil out of the crankcase. (A side ? .. Where does the oil come out of the genset ?) Fuel: Heat to a fuel line might cause the gasoline to vaporise in the suction line. The fuel pump can't pull more liquid fuel since it's now sucking vapor. More height between the fuel tank and the pump aggravates this problem. Having the fuel supply above the pump helps, (I think this is the likely problem since it's a roof top genset) Ignition: Electrical parts are notorious for failure when heated. Look for a spark after the engine has shut down by restarting it with a plug laying on the cylinder head. If you don't see the spark, then the ignition system is the cause. Or the low oil level switch is tripped. You might try to duplicate the heat conditions with a hair dryer on various parts to isolate the trouble area.
Edited by hosspuller 2011-04-17 12:17 AM
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Generator help, PLEASE!!!
I bought a Platinum trailer 4 years ago with an almost new top mounted Generac generator. Bought it in the early spring....when hot TX weather forced us to use generator more than 2-4 hours at a time, it would quit. Took it to a generator mechanic who found nothing wrong. It would run all night fine, but when it was really hot in hte daytime, nope. Sometimes it spews oil when it 'blows up". It's in a metal box with ventilation...we cut a hole and added a small exhaust fan, but no luck. Any ideas? One chick on BHW said theirs had an "altitude sensor" go bad, which was attached to the (she was not sure)..carburator?, which had to be replaced. Any ideas?
