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Old 06-06-2012, 09:28 AM   #15
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Thor Owners Club
Join Date: Dec 2009
Location: St. Augustine, FL
Posts: 111
I had a similar problem with mine, it turned out to be a kink in the gas line inside the tank. Would start and run for a minute or so and then if you put a load on it the suction would collapse the line and shut it off.
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Old 07-23-2012, 04:52 PM   #16
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Join Date: Jun 2010
Location: Anacortes, WA (Stick & Brick)
Posts: 2,643
My Onan (a 5.5KVA unit in an 02 MH) has developed this problem this year. I didn't leave enough gas in the main tank at the end of the season and after the second exercise period in December, it wouldn't start in January. I put 30 gallons in the rig last week, but it won't keep running. It will fire up, but when the regulator starts trying to adjust the speed, it bogs down and stops (takes about 15 seconds), with quite a lot of smpke out of the exhaust pipe.

I'm going to do the gravity feed thing with about a gallon of gas with carb cleaner in it. On the assumption that fixes it this time, I'd like comments on a suggestion from a mechanic at a local lawn & garden equipment rental shop where I got a new fuel filter.

He suggested having the generator running, then shut off the fuel feed and let it run until it quits. That way the on-engine metering system has no fuel in it when you leave it for a month or so, so there's nothing in there to case corrosion or leave deposits. My Honda lawn-mower has a fuel valve, and the OM recommends this procedure if you're not going to be using it for a few weeks. Works fine with the mower.

If folks think this is a good idea, I'll look into getting a fuel shut-off valve, as the generator doesn't currently have one. Since 5.5 KVA is roughly 8 horsepower, the valve will have to be bigger than the one on the mower.

Can anyone think of a reason not to do this?
Frank Damp -Anacortes, WA,(DW- Eileen)
ex-pat Brits (1968) and ex-RVers.
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