"96 XP won't accelerate

[mbusam]

My "96 XP starts fine but has no power. Bogs down on acceleration. I have cleaned the carbs and filters, changed the gray fuel lines. I've had it to twoo different dealers for service and they say it is getting too much oil, too little gas. One suggested resealing between the two halves of the crankcase and the other says it needs new crankshaft seals that are not replaceable without replacing the crankshaft. Both estimates are much higher than the ski is worth to me. Do these seam to be reasonable diagnoses? Would converting to premix be a way to inexpensively repair the trouble?

 

[timmyboy76]

no...do compression test, if all ggod, then..going back to your carb rebuild/s, what all did you do?..replaced everything inside/nuthing inside, just cleaned it?

 

[ablackway]

I have the same issue with my port engine. Idles fine, but up around 2000 rpm, it bogs down and won't let me accelerate. I held the choke out a few times to get it some extra gas and it ended up coming up fine. Took some troubleshooting and I know it means I'm gonna need to rebuild the carbs, but as a temp fix and a quick troubleshoot, you may want to try that. Do they sell new carbs somewhere? I think I'd rather replace mine than try to rebuild them. Unless there's a huge price difference...

Adam

 

[mbusam]

no...do compression test, if all ggod, then..going back to your carb rebuild/s, what all did you do?..replaced everything inside/nuthing inside, just cleaned it?

I just removed the carbs, cleaned them piece by piece with spray carb cleaner, and reassembled them, reinstalled them. Did find debris in the in carb filters, so I had hopes that I had found the problem, but this did not effect performance at all.

 

[Brendann99]

There's a good chance those diagnosises (sp?) are correct. I had a very similar problem on my 96 xp. Especially since two different places are telling you theres a problem with the crankcase. Turns out my front crank seal was completely gone and the bearing in there is missing some balls so I'm getting a rebuilt motor over the winter....

Cylinder compression is a good thing to check but I was still getting 150psi in both cylinders even tho it was litereally blowing oil right out of the front of the motor behind the magneto flywheel. Maybe there is a crankcase pressure test you can do? but just because theres good compression in the cylinders doesn't mean there's not a problem with the motor still..

 

[mbusam]

Had the magneto flywheel off when re-sealing the crankcase, as per the first dealer diagnosis. Saw no evidence of oil leakage or obvious seal failure.