Forum Discussion
gkainz
Jun 11, 2013Explorer
Generator - should be able to hear or feel the fuel pump running if it is. Easy to clean, easy to test (at least on the older Onans I've had). Pull the fuel line off the fuel pump, put a new section of hose on it and drop the end in a gallon gas can - try to start. If it starts, probably have cracked or broken fuel line into the main fuel tank, or main fuel tank level is below the generator intake hose.
If it doesn't start, and fuel pump is not running (test it in Prime position, noted in a post above). Again, mine was a late '80s 4K - no longer have it, but the fuel pump was a cylindrical unit about the size of a Red Bull can. Bottom unscrewed in a quarter turn and the plunger and spring slid out. Cleaned up the varnish and it ran again.
Your big red switch by the steering wheel is, in my opinion, most likely a battery combiner (emergency start) relay, that joins the engine battery and house battery together momentarily to provide a jump start to the engine, in case the engine battery gets run down.
If it doesn't start, and fuel pump is not running (test it in Prime position, noted in a post above). Again, mine was a late '80s 4K - no longer have it, but the fuel pump was a cylindrical unit about the size of a Red Bull can. Bottom unscrewed in a quarter turn and the plunger and spring slid out. Cleaned up the varnish and it ran again.
Your big red switch by the steering wheel is, in my opinion, most likely a battery combiner (emergency start) relay, that joins the engine battery and house battery together momentarily to provide a jump start to the engine, in case the engine battery gets run down.
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