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20 hp. yamaha outboard loss of power, squealing

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  • 20 hp. yamaha outboard loss of power, squealing

    motor makes an intemittant squeal, and loses power at about 1/2 throttle.Seems worse with load or in bad weather.No problems at *****ing speed at all. Any suggestions would be a help.

  • #2
    Run a compression test and check gearcase oil for water or metal in oil.
    Regards
    Boats.net
    Yamaha Outboard Parts

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