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  1. #1

    94 Sl650 Funny Noise??

    Well the ski is running great, but...

    At idle-starting it in the driveway-something in the drive train sounds like a bearing spinning in its race (ie electric motor bearings). It is a very active noise, you can "feel" it. Rev the engine it goes away.

    I pulled the pump, impeller feels good, tight but not too much certainly not loose or rough. Started the engine with no pump or driveshaft. The noise is gone.

    I put the pump from my other machine on and the ski makes exactly the same noise. Completely different pump and the same noise.

    In the water the noise is subdued but I can still sense it.

    Come to think about it, this ski has always made this noise.

    Is this normal? Any ideas??


  2. #2
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    I think thats sound is normal. Its all been greased right? How bout posting a vid. and let us hear it?

  3. #3
    Race, wreck, repeat delagem's Avatar
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    Rubber bumpers missing on either end of the driveshaft? Item #6 in pix. Mine are missing, sounds like a cement mixer in the driveway....

    Michael
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  4. #4

    Rubber Bumpers

    Hmmmm,

    The original drive shaft didnt have em.

    The other shaft, (installed with the other pump) has at least one of em. And is greased well with EP grease.

    Will try to do a vid--waitin for hanna to pass us by

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    "Marbles rolling around" sound, out of water is normal.

    In the water, you have problems.

    As mentioned before, make sure the bumpers are installed on BOTH ends of the driveshaft.

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by frobate View Post
    ...greased well with EP grease...
    If you can, you want to use waterproof grease, which sticks to metal better in the presence of water.

    I use Amsoil Synthetic Water Resistant Lithium Grease
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  7. #7

    OK-Xlint good description

    "marbles rolling around" in a coffee can??

    Good description--

    I can't hear it in the water and maybe what I am "sensing" ---feeling--- imagining---- whatever, is not that sound.

    But-WHAT IS THAT FREAKIN out of the water SOUND???

    Driveshaft slappin back and forth or to and fro if you choose??

    Or is it just um.....stuff... yeah thats it...stuff.

    Still raining....

    Hey did you know in PA even if you are WELL over 21 years of age you need a Boating Safety Certificate to operate a PWC???

    I didn't ----but that nice Fish and Boat officer pointed it out.... Heck even wrote it down..

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by frobate View Post
    "marbles rolling around" in a coffee can??

    Good description--

    I can't hear it in the water and maybe what I am "sensing" ---feeling--- imagining---- whatever, is not that sound.

    But-WHAT IS THAT FREAKIN out of the water SOUND???

    Driveshaft slappin back and forth or to and fro if you choose?...
    The drive shaft splines fit loosely into the impeller and the engine coupler. The engine's rotation is not perfectly smooth, so as the crank shaft accelerates and decellerates several times per revolution (as each piston cycles), the drive shaft and impeller also jiggle.

    If you take the drive shaft out, and put a medium-large blob of grease inside each before you reinsert the drive shaft, it will fill up the spaces between the splines.

    Make sure you have the rubber bumper in place on both ends of the drive shaft.

    Check the impeller bearings while you have the pump out. It should turn very smoothly, no noises or grinding feeling.

    Clean all the old grease off, and check that all the splines are all in good shape, drive shaft, impeller and coupler.

    Put it back together, and the metalic sound should be gone, or almost gone. It will slowly return as the grease works out.

    If the sound is stil there, you may have a bearing issue.

  9. #9
    Race, wreck, repeat delagem's Avatar
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    You're going to see that more and more, Boater Safety Certificate to drive a PWC. You're lucky, I think PA is one of the states that will accept an online cert.

    Not here in NY! It was so difficult to get my family through a class, that I finally became an instructor for just that reason....

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    In Canada, as of April 1, 1999, anyone wishing to operate a power-driven boat will require to show proof of competency. Certain age and horsepower restrictions apply for youths, and there is 'grandfathering' and a phase-in process.

    Proof of competency can take 1 of 3 forms:
    - proof of having successfully completed a boating safety course in Canada prior to April 1, 1999;
    - a Pleasure Craft Operator card issued following the successful completion of a Canadian Coast Guard accredited test;
    - a completed rental-boat safety checklist (for power-driven rental boats).
    That last one I have some trouble with...

    If you were born after April 1st 1983 and operate any type of powered vessel, you need your PCO Card.
    If you operate any type of powered vessel 4 meters (13.2ft) or less in length, you need your PCO Card.

    Everyone else who operates any type of powered vessel of any length will require their PCO Card by September 15, 2009.

    In Canada, next summer is the last summer where only some boaters must have their card.

    Interestingly, the Canadian Coast Guard test for the card is scheduled to be made more difficult, just in time for the rush for mandatory cards before the 2010 boating season.

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