Re: 33 VS 35 hp OMC.

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June 14, 2018 at 3:19 pm #77895
chinewalker
Participant

    US Member

    I’ve used 33hp pistons to rebuild an older 35 with no issues. As far as I recall, the head shape was more or less the same, but the 33 head lacks the expansion chambers for the compression release. The 33 also has the beefier redesigned 40hp crankshaft.