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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 27826
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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I have a briggs and Stratton 19.5 ohc intec and when sitting

Customer Question

I have a briggs and Stratton 19.5 ohc intec and when sitting overnight the cylinder fills up with gas and gets fuel in oil
Submitted: 1 year ago.
Category: Small Engine
Expert:  Curtis B. replied 1 year ago.
The carburetor needle valve and float are leaking. If they do not seal, the fuel runs into carburetor throat and into the crankcase breather hose.
Expert:  Curtis B. replied 1 year ago.
Carburetor has to be repaired or replaced.
Expert:  Curtis B. replied 1 year ago.
http://outdoorpowerinfo.com/repairs/briggs_walbro_lmt_carb.asp
Expert:  Curtis B. replied 1 year ago.
A fuel shutoff valve in the line from the fuel tank to the carburetor can be added and shut off fuel between uses. The leak only occurs when engine is not in use.