Can a overflowing carburetor cause this?

shillnavApril 15, 2013

Can a carburetor not shutting off fuel flow, filling the cylinder with gas,flowing into the oil---- cause a blown head gasket???


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It can finish the job if it had already started to blow through. Many times, OHV engines start off with a fine pin hole between the cylinder and the valve or oil return galley.

    Bookmark   April 15, 2013 at 10:35PM
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Sure. The cylinder gets some liquid gas/oil in it and you hit the 'start' button. Liquids are not compressible, so the piston stops hard. This is called 'hydraulic lock'. I can see how it could blow a head gasket especially with an electric starter.

    Bookmark   April 16, 2013 at 10:42AM
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Thanks for the replies !!

    Bookmark   April 17, 2013 at 7:34PM
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I would be happy if a gasket blew to relieve a hydro-lock. Next in line would be a bent rod.

    Bookmark   April 21, 2013 at 10:48AM
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I forgot to mention - you can accomplish the same thing on a mower in perfect condition by simply standing it up on it's wheels with the carburetor side down. Always tilt it up with the carb on the high side, like you would to dump the oil.

    Bookmark   April 23, 2013 at 11:03AM
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