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??
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Check to see if all cylinders are firing by using a timing light. Could still be one carb jet or passage plugged up.
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Is tach accurate, did it used to turn more rpm's, has anything been changed on jet pump?
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If fire is good then probably a fuel issue, try bumping choke and pumping fuel primer bulb to see if runs better.
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Not sure, it would need to taken to a dealer to have checked out and find problem.
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