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no compression on #4 cyl.

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  • no compression on #4 cyl.

    I'm new to boating; I bought a 89 dt 90 v4 and all cylinders have 120 lbs of compression except # 4 which has zero? It spins over freely and the spark plug looks good? What could the problem be???

  • #2
    Remove head and inspect for damage on cylinder and piston.
    Regards
    Boats.net
    Suzuki Outboard Parts

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    • #3
      could only be a damaged valve, need to remove head and inspect

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