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  1. #1

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    Kawi guy having Seadoo jet pump install issue!

    1996 GTX 657x

    Had the driveshaft carrier bearing go so I replaced it and rebuilt the jet pump. Engine spins freely without pump installed, jet pump spins with a fair amount of drag because of the new liner but normal.

    Once I begin to snug up the jet pump housing to the hull the driveline is binding up somwhere. With the nuts about a turn and a half to 2 turns backed off, the engine and pump can be spun together by hand. When I do a final snug of the attaching bolts everything binds up and will not spin freely.

    As soon as you back the nuts off it spins free. There was one washer each on each stud between hull and pump assembly and still presently installed that way now. Are these pumps to be shimmed off the hull?

    I loosened the motor mounts to see if it was binding up against motor but the motor seems to have some play, still looking into it now.

    Any suggestions? What am I missing?


  2. #2
    Myself's Avatar
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    I've had that happen before. Get ready with it loose, spray wd40 up inside, have somebody fire it up and you tighten it down a little at a time. The impeller will clearance the wear ring.

  3. #3

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    Do make sure you have some end play on driveshaft after pump is tightened up.Could be a leftover rubber bumper still in one end. Also make sure the impeller shaft has a little bit of end play too. It is possible to tighten the impeller down and thrust bearing is not seated. This causes a slight bind and also reduces the needed end play on driveshaft. Will also destroy the pump if run this way.

  4. #4

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    Quote Originally Posted by Jamescmei View Post
    1996 GTX 657x
    Had the driveshaft carrier bearing go so I replaced it and rebuilt the jet pump. Engine spins freely without pump installed, jet pump spins with a fair amount of drag because of the new liner but normal.
    If it has the anti-rattle cone, make sure it isnt the anti-rattle assembly that is contributing to the tightness

    There was one washer each on each stud between hull and pump assembly and still presently installed that way now. Are these pumps to be shimmed off the hull?
    I dont recall a washer in between the hull and pump, only on the outside of the pump


    Also:
    1996 GTX = 787cc
    1995 GTX = 657x

    Which one is it?

  5. #5
    Quote Originally Posted by Seadoo timebomb View Post
    It is possible to tighten the impeller down and thrust bearing is not seated. This causes a slight bind and also reduces the needed end play on driveshaft
    Yup, have to make sure you keep it seated or it will shift and bind when the pump is tightened to hull.

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  7. #6
    Connecticut CrazyA's Avatar
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    Quote Originally Posted by WhiskeyD View Post
    Yup, have to make sure you keep it seated or it will shift and bind when the pump is tightened to hull.
    Definately.

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