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  • compression

    when doing a compression test on a 2005 60 hp 2 stroke do i have to ground the plug wires or unplug the coils, allso how much compression should i have

  • #2
    Unplug the landyard cord and plugs wont fire. Compression should be even, no more than 10 percent difference between cylinders.
    Regards
    Boats.net
    Yamaha Outboard Parts

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