I've got a 2002 Ultra 130di that starts and revs just fine in the driveway (idles and revs up past 5000 rpm), but once I put it in the water it bogs down and won't go more than 5mph at 1200rpm. I've checked the compression on all cylinders and they are around 130-135psi each, and it appears fuel is getting to the engine just fine. The flame arrestors are clean, and now I'm wondering if it might be the pump or impeller. How do I check that and, if there is an issue, would the SBT pump rebuild kit for my PWC be the option to take?
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Ultra 130di revs fine but won't go in the water?
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