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Go Back   Only Cub Cadets > Cub Cadets > Cub Cadet Engines > Onan Engines

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Old 07-28-2014, 09:56 PM
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yf-Al yf-Al is offline
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Location: Maine
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Default Onan black exhaust

Hellow Everyone......

My turn to seek assistance. My CC 2146 Onan is ill. When I attempted to start
it, it backfired repeatedly the exhaust was blue at first then black, The only way I could keep it running was to work the throttle. Thinking the black exhaust was a rich mixture I went to the carb and found oil on the air intake venturi

I think I know what the problem is, but before I pick up the BIG hammer I thought it would be prudent to ask the pros.
Thanks, Albert
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Old 07-28-2014, 10:02 PM
J-Mech J-Mech is offline
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There is a reed valve in the crankcase vent. They are prone to breaking. I'd check that. I imagine it's a vent problem. But wouldn't hurt to pull the carb and go through it too while you have it apart.
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Old 07-28-2014, 10:17 PM
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yf-Al yf-Al is offline
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Default Onan problem

Thanks, I'll check that out tomorrow. Albert
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