Reply With QuoteDon't know anything about your build, and that makes your generalized question a little hard to reply to, short of a generalized answer.
Speed-Pro calls out a "skirt clearance" of .002", but the specifics as to how and where the measurement is taken is not in front of me at the moment.
As far as your requested piston-to-cylinder wall clearance for that piston in a marine application...and assuming this to be a mild natrually aspirated lake boat motor...I would suggest a minimum of .004". But this clearance could be greater for a higher performance engine and/or other specifics in the build.
If that is your build, then you are in the ballpark for a 450HP or less motor; if not, then you might want to lay out more info...
LO
