How to prevent generator vapor lock
I have a Onan Gold 7000 generator. Runs fine normally, but sometimes when traveling in hot weather it develops vapor lock. When it happens, it has been when temperatures outside are above 97/98. We...
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If you're sure it's Vapor Lock (liquid gasoline evaporating to vapor in the fuel line/filter), then have you inspected the routing of the fuel line? It may be near a hot spot. Exhaust, for example, of the road engine or the genny itself.
Are you sure the genny's fuel pump isn't weak? If it persists, I suppose you could mount another pump, near the main fuel tank, and let it have a very short "pull" from the tank then it would "push" the fuel toward the genny. This is part of the logic behind putting the fuel pump IN the tank. With the fuel being PUSHED all the way from Tank to Engine, very little chance for it to go to vapor.
Just be sure that if you add another electric pump, that it works off of whatever safety feature that stops the OEM pump if the genny stops. You can determine that from the wiring diagram in the service manual, or probably just tie it to the power for the OEM pump. Might need a bigger fuse..
Are you sure the genny's fuel pump isn't weak? If it persists, I suppose you could mount another pump, near the main fuel tank, and let it have a very short "pull" from the tank then it would "push" the fuel toward the genny. This is part of the logic behind putting the fuel pump IN the tank. With the fuel being PUSHED all the way from Tank to Engine, very little chance for it to go to vapor.
Just be sure that if you add another electric pump, that it works off of whatever safety feature that stops the OEM pump if the genny stops. You can determine that from the wiring diagram in the service manual, or probably just tie it to the power for the OEM pump. Might need a bigger fuse..
