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    Hi I'm new to the forum and was wondering if I could get any help, I have 1998 Johnson 60hp jet drive and had all the carbs rebuilt and tuned as well with the timing adjusted to 17 degrees along with one new coil pack, but can't get the boat to rev over 3500 RPMS, compression in all 3cylinders are over 125 and spark seems to be great any other ideas??

  • #2
    Check to see if all cylinders are firing by using a timing light. Could still be one carb jet or passage plugged up.
    Regards
    Boats.net
    Johnson Outboard Parts

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    • #3
      Just did that a little bit ago and every one hits every time.

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      • #4
        Is tach accurate, did it used to turn more rpm's, has anything been changed on jet pump?
        Regards
        Boats.net
        Johnson Outboard Parts

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        • #5
          We tried 2 different tachs and both read the same, nothing else has been changed it use to run about 5200, we're starting to loose hope.

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          • #6
            If fire is good then probably a fuel issue, try bumping choke and pumping fuel primer bulb to see if runs better.
            Regards
            Boats.net
            Johnson Outboard Parts

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            • #7
              I bumped the choke and it immediately died out and pumping the ball had no effect.

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              • #8
                All of the reeds look fantastic and the exhaust ports seem to be free as well.

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                • #9
                  Not sure, it would need to taken to a dealer to have checked out and find problem.
                  Regards
                  Boats.net
                  Johnson Outboard Parts

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                  • #10
                    Thanks you the help guys

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