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Thread: i blew my 951!!

  1. #1
    mibunkerking's Avatar
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    Unhappy i blew my 951!!

    i finally got to do a compression test on my 98 xpl that i have been having problems with.

    results
    mag - >120
    pto - 0 thats no typo, i mean zero. didn't even make the needle move.

    so i am assuming this means i need to do a topend rebuild right?

    i have no idea how to do this so is there a step by step somewhere? but first and foremost, do i need to pull the motor to do this or can it be done in the ski? how about the best place to buy a rebuild kit?

    if it cant be done in the ski i might just pay the seadoo dealer to do it. what would be a fair price for a dealer to charge for this so i dont get ripped?
    Last edited by mibunkerking; 09-12-2008 at 05:39 PM.


  2. #2
    My Jet Ski drinks more than yours Glenozzy's Avatar
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    pull off the head and post pic's

  3. #3
    mibunkerking's Avatar
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    is there any trick or anything i need to know to do that or just undo the bolts and pull?

  4. #4
    My Jet Ski drinks more than yours Glenozzy's Avatar
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    the head no, but the cylinders yes, take a peak at the manual

  5. #5
    King_Of_Fun's Avatar
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    Quote Originally Posted by mibunkerking View Post
    i finally got to do a compression test on my 98 xpl that i have been having problems with.

    results
    mag - >120
    pto - 0 thats no typo, i mean zero. didn't even make the needle move.

    so i am assuming this means i need to do a topend rebuild right?

    i have no idea how to do this so is there a step by step somewhere? but first and foremost, do i need to pull the motor to do this or can it be done in the ski?

    if it cant be done in the ski i might just pay the seadoo dealer to do it. what would be a fair price for a dealer to charge for this so i dont get ripped?
    Be carefull with the dealers. Some will rebuild it the right way, some will want to put in a rebuilt engine. And there are some rebuilt engines that are junk. It's hard to guess without knowing exactly what needs to be replaced. For instance, if the pto side ran lean and toasted the piston, it could be due to a leak in the pto side crank seal. You might just need a piston & rings, or you might need a crank too... Ron

  6. #6
    mibunkerking's Avatar
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    k i will pull the head now. back in a bit.

  7. #7
    mibunkerking's Avatar
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    heres pics

    the head

    mag side 120psi

    pto side zero psi

    heres both mag on the right pto on the left




    as you can probably see, there is a good size gap between the piston and wall on the pto side at the bottom. it closes up need the top.

  8. #8
    96XPSS's Avatar
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    Looks like it seized from lack of fuel or oil. Not too bad from what I can see...which isn't much. Can you get a more detailed pic of the cylinder walls of the seized piston? If you look the aluminum smeared on the sides is where the piston melted. That's what I need to see.

    Can you feel any scratches with yourt fingernail?

  9. #9
    mibunkerking's Avatar
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    i can feel scraches on both. they are smoothed over but they are there. the pistons move freely. i can push them down with one finger.

    its hard to get good pics. i have find a camera with a flash on it. the whole flashlight with the iphone thing isint working to well.

  10. #10
    PEST!'s Avatar
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    Before you jump in and just do a top end. You need to seriously think about what kind of crap ran through the bearings on the crank and are th rod ends damaged from heat... I dont like doing topends because its hard to put a garanty on an engine in that condition

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