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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Oil in air breather

Vanguard v twin briggs and stratton too much crankcase pressure pushing oil up through the crankcase breather into the air breather. Just replaced one blown head gasket, adjusted valves both sides, new fuel pump, problem worse, HELP, please mower runs great but after mowing for 10 minutes there is approximately one tablespoon of oil in the air breather.

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Sounds like you have too much oil in the engine (should normally be around 500-600ml when there is too much oil, it gets past the piston rings and pushes it through to the head.

Posted on Jul 09, 2009

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