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Old 09-09-2010, 06:44 PM   #1
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Diesel Generator Smokes

I'm getting bad light gray smoke from my onan 5.5 quiet diesel. Really bad at start up them thins some after a couple of minutes. Also really smelly and embarasing as we are in the middle of a 2 week trip. Please help!
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Old 09-09-2010, 07:21 PM   #2
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Changed air filter lately? Rich start usually means lack of air.
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Old 09-09-2010, 08:09 PM   #3
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I agree, the first rule of owning a diesel: Keep all the filters changed per maintenance schedule! After changing the air filter, I would add the proper ration of Performance Formula - Stanadyne to your MH fuel tank once a month. This will clean both your diesel engines fuel systems. Does your genset have a fuel filter? How long since it's been changed?
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Old 09-10-2010, 11:23 AM   #4
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Thanks for the replies. Filters are all new. Could be altitude related? We are camped at 7800'.
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Old 09-10-2010, 08:11 PM   #5
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Thanks for the replies. Filters are all new. Could be altitude related? We are camped at 7800'.
Yes that could be. A non-turbo diesel engine will run too rich at high altitude, when set-up for low altitude. Same as an old carburetor auto would.
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Old 09-12-2010, 04:41 PM   #6
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Yeah mine starts rich at Yellowstone (7730') too. Works fine here in FLA but the scenery is not as good.
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Old 09-13-2010, 06:55 PM   #7
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Yeah mine starts rich at Yellowstone (7730') too. Works fine here in FLA but the scenery is not as good.

How did you know we were in Yellowstone? We,re in Grand Teton now, about 1000' lower and it's running better.

Thanks for the replies, all.
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Old 09-14-2010, 07:15 AM   #8
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Ranger at Grant Village...altitude just rang the bell. AND...you aren't the first with the question this summer or last. It's a mountain thing.

Safe travels... 93 back here in FLA..yuck!
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