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  1. #1
    mxl16's Avatar
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    lost compression on all cylinders

    talked to my dealer today, they checked compression and all three cylinders are down . they are ripping the top end out to see what they can find. maybe if it sits there long enough i wont have to winterize it . glad they caught it now then in the summer. all else fails they said they would just drop a new engine in. gotta love that warranty, i think im buying an extended warranty like yesterday. couldnt image what kind of money this would cost out of warranty .

    lets hear from the experts...what do you guys think the problem could be?


  2. #2
    Moderator Franko's Avatar
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    I'm no expert by any means, but if they are all down, it could be the gauge they are using. And what was the psi? Were you down on RPM? I would suggest a leak down test before tearing the engine apart.

  3. #3
    EZ Dock of Long Island Shibby1485's Avatar
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    did they tell you what the compression readings were?

    are they good mechanics? are they sure they checked it properly? unusual for all 3 cylinders to be down significantly the same amount... most times a worn out motor will have staggered compression readings

  4. #4
    EZ Dock of Long Island Shibby1485's Avatar
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    as franko said... DEFINITELY verify this before they tear down the motor... last thing you want is a perfect;y functioning motor yanked apart for no reason

  5. #5
    mxl16's Avatar
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    my mistake..the compression is 145, 135,105..im not sure what they are supposed to be. i was just out last friday hitting 8200 rpm, pulled hard. the guy is a really good mechanic..i think one of the better ones in the tri state area. i dont have any doubts that he'll fix it the right way. they said they talked to seadoo first..i assume they went through and made sure the gauge and evrything is accurate..then they gave them the permission to rip it apart.

  6. #6
    Site Admin Green Hulk's Avatar
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    I would have them do a leakdown test (as the seadoo manual says) before they take one single bolt off of it.

    I think he has a problem with his gauge

    Especially since you were ripping along at 8200 RPM's!

  7. #7
    EZ Dock of Long Island Shibby1485's Avatar
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    compression should be in the 140 range... they say with all the cylinders being within 10psi of each other or something like that...

    unfortunately, those compression numbers sound all to familiar... VERY surprising tho for an 05 model that's very mildly modified.

    how many hours on your ski now?

  8. #8
    mxl16's Avatar
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    about 58 hours..and he checked my pops rxt too (which was fine). so i dont think its the gauge

  9. #9
    Nonstop, all day, everyday. 01xdime's Avatar
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    Jerry is right checking the compression is by no means an excuse to tear down the engine. It's just a step towards troubleshooting. Next step is the leak down test. If it leaks down rapidly THEN check the pistons, rings, and valve seats.

  10. #10
    way2fast's Avatar
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    At $85 an hour they would LOVE to rip your engine apart. I smell something fishy here. How about you ask to watch them do the compression test THEN watch them do a leak down proceedure. If your engine had a problem you would know it by riding it....no way would you be seeing 8200 rpm's

    Richard

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