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Old 07-06-2014, 12:35 PM   #1
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Gasoline in oil??

Onan 4000 quits running. Check oil and it pour out with gasoline smell. Really diluted as well. What is happening??? And how???. Thanks
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Old 07-06-2014, 12:52 PM   #2
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Needle and seat in carb is letting fuel leak by. Could be caused by a faulty float in carb.
If there is a fuel pump that is driven by the camshaft, that is another place where gas can get into engine oil.
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Old 07-06-2014, 08:24 PM   #3
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Thanks, will get a mech. to check it out this week. 1994 Callista Cove Class C. Looks like genny is on a slide out rack but doubt the rack can handle the weight.
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Old 07-16-2014, 10:38 AM   #4
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Shouldn't need to be slid out to service the carb...
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Old 07-17-2014, 06:20 AM   #5
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Update. Thanks for the guidance. Took carb. off, cleaned it, checked float, appeared ok. Put new plugs in, air filter, and oil filter and oil. Cranked it up, runs better than ever. Considering my previous observation of "something" not shutting down when I shut down the generator once before, (I thought it was the starter still engaged), the mech suspected it was the fuel pump, which repeated itself again and forced the gasoline thru the carb. Have used it a number of times since, and seems normal. Will pay attention to the shut down. Thanks
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