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that is not an old school 2 stroke. that is fuel injected and I believe probably one of the hpdi engines. Not sure on the last part but if it is, it is an awsome motor. rpms shoule be around 5500 . I have a 150 yamaha hpdi and turn a 14.25 dia 18 pitch 4 blade stainless.. I can only turn 5250 rpm but my speed is average around 42
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