Question about Briggs & Stratton Briggs Stratton Vanguard V - Twin Vertical Ohv Engine with Electric Start 23 Hp, 1" X 3 5/32" Shaft, ModelNo. 386777 - 0036 - E1

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Engine smokes and looses power

I have a 22HP briggs V twin vanguard engine that is running very rough. When cutting grass what usually was no issue now boggs down the mower. Am seeing some white smoke. Pulled the spark plug, they were very black. Replaced with new ones and properly gapped. Ran OK for a short time (several hours). Then it ran rough again. Check the plugs, again very balck. Cleaned the plugs, same thing. what else to check. I am not afraid to tear it apart, but have no manual on that.

Thank you,
mike

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Check the air filter, replace.

Posted on Jun 27, 2009

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