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17 hp B&S

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I have a 17hp B&S ohv single cyl motor

went trying to start it it blown gas back out of the carb

motor has not been run in a while

valves are opening and closeing ok any idea what could this?

thanks. JJ

compression on motor is 120


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If it is blowing gas back out of the carb, the intake valve can't be closing properly, or somehow the camshaft timing is off. The last time I saw an engine spitting gas back out of the carb, a small capscrew from the air cleaner mounting plate had gotten ingested into the intake and was lodged between the valve and cylinder head. The valve did move, but did not close and seat.

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