Re: OMC question for Skools
according to parts book it wasn't the correct one. but still may fit. i had a 140 with shaved heads and it had 136 PSI before the shaved heads. after i put a set on that were shaved it jumped the compression to 190 PSI and the stock starter couldn't turn it over. But it run like he!! and made around 175 hp. Heads on it were actually shaved to much these were shaved 1/4 inch lol. You'll have to richen it up to run higher compression. I'd check the piston to head clearance before taking off the stock ones in the spark plug hole. Then mount your new heads and turn it over by hand without plugs and check the piston clearance.
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1978 V20 Cuddy w/ 225 Johnson. And Several other boat's
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