Knock sensor repeated failure

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  • CincinnatiCC
    • Dec 2014
    • 156

    • Cincinnati, OH

    • Current 2016 SN 200 OB Past 2008 SN 206, 1989 SN 2001
    #1

    Knock sensor repeated failure

    I have a 2008 206 with the PCM 343 engine. For the last several years, I have had to replace the knock sensor. I've had it done at winterization by my dealer, and it seems to work fine at the start of the next season, but at some point in the summer it fails again. It leads to a warning beep any time the boat exceeds about 30 mph. Has anyone run into this issue? Wondering how easy it is to replace the knock sensor myself. Also, if anyone knows the part #, that would be helpful. Thanks
    Tags: None
    • Beach-TJ
      • Oct 2010
      • 207

      • Lake Lanier, Ga

      • 2004 SAN 210 TE
      #2
      Replacing the knock sensor on a 350 block is easy. It ( our they ) have to be removed every time you winterize. The knock sensor(s) go in the block drain holes.

        Comment

        • Nautiquehunter
          1,000 Post Club Member
          • Jun 2008
          • 2080

          • Flowery Branch GA Lake Lanier

          • 2008 210 SANTE 67 Correct Craft Mustang
          #3
          I worked as a GM tech for 20 years . I don't think I have seen 2 bad knock sensors in all that time. A knock sensor picks up vibration a spark knock can cause that vibration but so can a loose bracket or mount.

            Comment

            • CincinnatiCC
              • Dec 2014
              • 156

              • Cincinnati, OH

              • Current 2016 SN 200 OB Past 2008 SN 206, 1989 SN 2001
              #4
              Interesting to hear. Thanks guys.

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