Re: OMC V-8 Outboards...
i had a 1986 140 done that way bigger bore doesn't make them have more HP like that just makes them later model style motors, but when we shaved the 1986 heads down 1/4 inch they compression went from 135 ea to 190 each then it ran extremely strong but the starter can't turn them over so i put stock 1990 heads on it back to factory.
just remember
compression / fire / fuel
that is all a 2 stroke needs
make them run that is all makes a 2 stroke stronger so raise all them and you will raise the HP
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1978 V20 Cuddy w/ 225 Johnson. And Several other boat's
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