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Bob Bender

08-26-2016 08:56 PM

4000 Onan running rich

Onan gen putting out a lot of soot on exhust. 4000.

Jim Wahl

08-27-2016 12:51 AM

Re: 4000 Onan running rich

There is an adjustment screw on the carb for altitude changes. Make sure that is set correctly. Had a problem with mine a while back. Jim

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