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2010 yamaha 210

  1. D

    2010 AR210 motor is making a knocking sound

    My 2010 AR 210 Yamaha jet boat port side motor started making a knocking sound. The sound is only detected while idling and at low RPMs. At higher RPMs, it seems to run fine. Sometimes while idling, the RPMs are affected by the knocking, as indicated on the RPM gauge. Last year I took it out...
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