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  1. #1
    monaroman76's Avatar
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    Carbon seal cavitation

    Guys, how quickly can the carbon seal/accoridan boot go bad?

    I was riding today for a couple of hours with no issues (a bit of cavitation off the line), when it seemed all of a sudden, I started to cavitate REAL bad. I was having to feather the throttle to get it on the plane

    I assumed that I had sucked up something that destroyed my wear ring, so I pulled my ski out of the water, pulled the pump and flipped the wear ring (it really didn't look too bad though..)

    When I got it back in the water, I thought all was okay, as it got up on the plane pretty easily. The problem came back again about 10 minutes later, which I thought was odd.

    Im going to try to pull the accordian boot forward and reclamp it first thing in the morning, I really hope it does the trick.
    I'm spending a few days at the river over Christmas and I don't want the ski to be out of action...

    Thanks guys, merry Christmas!


  2. #2
    ou812's Avatar
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    Was there water in the hull? Maybe your wear ring is spinning?

  3. #3
    monaroman76's Avatar
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    There was a small amount of water in the hull, so no sure how much the bailers had syphoned out.
    What can cause the Wear ring to spin? It seemed tight in the housing..

  4. #4
    Steve STSPERFORMANCE's Avatar
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    I had that happen when the rubber button on the front of the drive shaft went bad and the the prop came off the driveshaft. not all the way off but the symptoms were just like yours.

  5. #5
    Mod less, ride more! troyheb's Avatar
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    Could be when you reinstalled the pump the drive shaft moved slightly and the carbon ring sealed good again for a short time.
    Is it the original carbon ring and how many hours?

  6. #6
    Eric Ocman's Avatar
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    feathering the throttle to get power = bad wear ring IMO. Im betting you sucked up some sand or debris and it needs flipped and or replaced bro.

  7. #7
    ADAMBOMB's Avatar
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    Check your neoprene seal as well. see if it got kinked are is worn.

  8. #8
    monaroman76's Avatar
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    The carbon seal and boot is the original piece. 125 hours.
    Eric - I flipped the ring and it didn't seem to help much at all. The wear ring didn't look too bad though.

  9. #9
    Mod less, ride more! troyheb's Avatar
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    Quote Originally Posted by monaroman76 View Post
    The carbon seal and boot is the original piece. 125 hours.
    I bet its toast.

  10. #10
    monaroman76's Avatar
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    I pulled forward the rear of the accordian boot and reclamped it. It's probably 1/8th of an inch forward from it's standard position. This seemed to help the problem a fair bit. It's still far from perfect though. For some reason, the issue definitely seems to get worse after the ski warms up. When it first comes off the trailer it's not too bad, then it gradually gets worse.
    There doesn't seem to be a huge amount of water getting into the hull, so I'm hoping it can last me another couple of hours of riding.
    I made 79.4 @ 8420 with the 83mm nozzle this morning.

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