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Recent content by sailfish1

  1. S

    tohatsu 20hp 2010 four stroke HELP knocking at full throttle

    I have a 20hp New motor been running great but yesterday only at full throttle there was a loud pinging or knocking sound at the front of the motor. I did take everything out of the boat so it was much lighter than usual. Any suggestions would be great. Is it a spark plug? etc. or over reved...
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