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  1. #1
    kopfb's Avatar
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    Ultra 150 Driveshaft getting hot enough to turn blue

    Trying to figure out an issue with an 2000 Ultra 150. The motor seized about 2 weeks ago so we had a rebuilt engine put back into it. Starting it up and there seemed to be a lot of noise coming from the drive train but it has sounded a little noising since it was bought. Took the ski out today and it would only get up to about 50 mph. Brought the ski back to the dock and pulled the seat. I was already suspecting something was wrong with the driveshaft or pump or bearings. Went to pull on the the drive shaft to see how much play was in it and it was blistering hot and blue in color like it was extremely hot. Any one have any ideas what to start looking at or what could be causing that? Did a search but I can't find any posts relating to this.


  2. #2
    steve45's Avatar
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    My guess would be the front driveshaft bearing.

  3. #3
    kopfb's Avatar
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    So doesn't that require having to pull the engine to get the shaft out to change those bearings? I was hoping it just needed a pump rebuild.

  4. #4
    kopfb's Avatar
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    Also, would the bearings going out in pump or front driveshaft cause such a drastic reduction in speed?

  5. #5
    captainoverspray's Avatar
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    pull the tail cone off the pump and see if there is water in the bearings. that will tell you if the seals are good or not. Also pull the pump out, might be easier to do that than pulling the motor. Those pump can be a bitch to pull if they are all corroded.

  6. #6
    kopfb's Avatar
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    Thanks guys! Will look at the pump first, probably rebuild it anyway and go from there. Yeah I heard taking that pump off my cause you to cuss a lot.

  7. #7
    kopfb's Avatar
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    Ended up pulling the pump cone off and sure enough there was water in there so a rebuilt kit was ordered.

  8. #8
    kopfb's Avatar
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    Forgot to mention also that the first bearing behind the cone looked pretty bad and in the process of trying to take the cone off we broke the cone so that was ordered as well.

  9. #9
    witness140's Avatar
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    As far as replacing the bearing holder/bearing goes, you can lift the rear of engine with a hoist - enough to slide the driveshaft forward and out of the bearing holder. Saves the pain of all the disconnections, carb removal, etc - involved with complete removal.

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