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  1. #1
    lxman88's Avatar
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    no idea whats wrong

    ok i was out riding today on the ski and im crusing about 3/4 throttle going good all a sudden the pump like acts like its not hooking up or something is slipping the motor runs fine raps up real nice but the ski wont even get over about 5 mph took the pump off impeller and everything look just fine no chunks taking out all the tolerence on the wear ring is good the drive shaft groves all look good no sighs of the drive shaft striping is there some kind of bushing in the pto cupling where the drive shafts goes in like on some boat props that can wear out and once it does wont allow all the power to get to the impeller idk whats going on someone help please i mean it feels good till you get about 2000 rpm and from then the motor just raps out and u go know where fast


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Are you sure you didn't suck something up into the jet pump/intake area? A blockage there will act just like you described.

    If there was nothing found, unfortunately I had a similar problem a few years ago. All pump parts looked good, but acted like you said.

    I was never able to pinpoint what the actual problem was. At that time I did alot of upgrades to the ski, including turning the pump to a long style with a SS 6 vane. Never had the issue again.

    Only other thing I can think of is cavitation. Can you see exhaust soot present in the jet pump intake area?

  3. #3
    It's a JEEP thing...You wouldn't Understand dirtdude35's Avatar
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    did you check your engine coupler? Is you intake grate clean?

  4. #4
    jackofalltrades's Avatar
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    Quote Originally Posted by dirtdude35 View Post
    did you check your engine coupler? Is you intake grate clean?
    +1 on the coupler. If it is mechanically solid to the impeller and the engine is reving it has to be the coupler.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by lxman88 View Post
    ... is there some kind of bushing in the PTO coupling where the drive shafts goes in...
    There are two versions of the PTO drive shaft coupler.

    If you have the solid coupler, then check the splines inside the coupler and on the engine end of the drive shaft. One or the other (or both) may be stripped.

    If you have a rubber bonded coupler, not only must you check the splines, but sometimes the rubber bonding fails.

    When a rubber bonded drive shaft coupler goes bad

  6. #6
    casey67's Avatar
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    I've had it happen several times. I shut it off,shake it around, restart and works fine.
    Did you shut it off at any time and try it again or did you just take it out of the water ?

  7. #7
    lxman88's Avatar
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    yes i did shut it off it does not have anything in the intake grate or impeller im guessing its the engine cupler im pretty sure its the rubber bonded one and it wore out cuz all the splines check out where can i get a new cupler and how do you get it off ive never had to take one off

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by lxman88 View Post
    ...where can i get a new coupler and how do you get it off?...
    Any of the Polaris Parts Sources listed through my signature links

    Use the 'rope trick' to remove the coupler.

    How to loosen PTO coupler using rope inside the cylinder (works for flywheels too)

    Once you have the rope inside the cylinder to lock the crank shaft, the coupler just unscrews. It can take a LOT of torque to get it to come loose.

    Before you remove the PTO coupler you must remove the jet pump and drive shaft.

    How to remove and re-install the Polaris 148mm jet pump (1994-2004)

    How to remove the 148mm modular jet pump (1994-2004)

  9. #9
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Is your coupler Stainless Steel or black in color?

    Can you see exhaust soot in the jet pump intake area?

    It's not uncommon on the older crafts to have an air leak (cavatation) around the pump shoe. (intake for the jet pump) That requires re-sealing of the shoe to the hull.

  10. #10
    lxman88's Avatar
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    yea i have the ss steel coupler and let me look for the exzaust soot. but as far as i know its does not have any but ill cheack so im looking like around the intake grate for exzaust soot?

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