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  1. #1

    Drive shaft noise?

    What is this noise? It seems to be coming from the drive shaft. You can hear it really well right before I kill the motor.

  2. #2
    Click avatar for tech links/info K447's Avatar
    Join Date
    Jul 2007
    near Toronto, Canada
    Turn the drive shaft over by hand, using the PTO coupler behind the engine.

    Any noise coming from the jet pump or drive shaft bearings?

  3. #3
    ph2ocraft's Avatar
    Join Date
    Apr 2006
    Campbell, Ca.
    Lube the thru hull fitting and coupler.

  4. #4


    The extension is .mov. It is listed as an acceptable file type. Not sure why it doesn't upload. I'll try YOUTUBE and then post a link.

  5. #5
    I've lubed both the fittings, one next to the engine, and the coupler (which is new)

  6. #6


    The noise I'm speaking of is heard best @ 8-10Seconds in the video.

  7. #7
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    That sounds like the impeller hitting the wear ring. Have you checked the pump and bearings.

  8. #8
    I got a used wear ring and the shop put new bearings in the pump last year. I rode the ski 5 times and the motor went out. I picked up another 750SL with a busted pump. The bearings had seized. I swapped the pump off my ski with the blown motor. Before I put the pump on, I spun the impeller and it would just barley touch the wear ring. It wasn't much at all and I figured it was surface rust on the used wear ring I bought. The impeller spun fine, the bearings should be good. Is this a major issue? I thought if I rode it a few times, it would burn past the surface rust. Any thoughts?

  9. #9
    The powder Man!! ashelgren's Avatar
    Join Date
    Jun 2008
    Geigertown , Pa

    Me too

    I have a 94 750sl that I got 4 weeks ago it run good but I have the same problem as you. It sounds the same I'm new to jet ski so I thought it was just how they sound out of the water in the water its not as loud and it runs good. I have a 96xp only had that for 2 weeks kind of the same noise out of the water. I'm with this guy help can this f-up the engine or is it a matter of lube or bearings are all drive shafts loud?

  10. #10
    Thats what mine does too.

    Do i need new pump bearings?

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