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  1. robert1612

    Outboard 2 stroke piston port holes? Please, HELP ME!

    In rebuilding a Mercury Sportjet with Force 90hp stroke I used Wiesco forged pistons but they do not have the 2 large diameter (approx 1") holes on the pistons intake skirt as the originals had. Wiesco claimed they are not needed in reguard to power and were intended for reducing piston weight...

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