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Recent content by Fish Prospector

  1. F

    Mercruiser Stern Drive noise

    I recently replaced my Mercrusier Alpha1 Stern Drive with a genuine new Mercruiser unit. It seems to run fine but there is a kind of harmonic humming noise at cruise speed, 3000-3500rpm. I broke the unit in as per mechanics guidelines and have replaced the break-in oil. I have put about 40...
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