Question about Briggs & Stratton Lawn-Boy 10642 20-Inch 6.5 HP Gas Powered Variable Speed

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My B&G Lawnmower Model#10642 is spitting out and leaking oil. What could the problem be?

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Sounds like you might have too much oil in the sump or a wet sumped ( had a engine flooding )
does the oil in sump smell like petrol and runs like water if you tip some out ? if carb is not shutting of fuel flow
if so drain and refill to correct level andgive tank and carb a thourgh clean out and check / replace needle and seat in carb, check float for fuel inside float ?

then check that breather is not stuck closed and is allowing pressure build up in crankcase and forcing oil past rings into the combustion chamber

is the oil comming out of muffler ?or from somewhere else ?

check for a tight inlet or exhaust valve

have look and let me know what you find

cheers pauly46

Posted on Sep 10, 2010


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