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Thread: SLT 750 issue

  1. #1

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    SLT 750 issue

    Went to the lake this weekend, and my '94 SLT 750 had issues.
    1. WOT would not go above 57-5800 RPM. Ski seemed to run great otherwise, until......

    2. Right at the end of the day, my daughter got caught in a debris field. Ski would idle just fine, but would not go when giving throttle. Engine would rev up, but ski wouldn't go faster than idle. Sounded exactly like a boat with a spun prop. When we pulled it out of the water, I got underneath to check the impeller. There were 4 sticks about the size of a pencil jammed into the impeller. Could these sticks have caused that, or has it most liekly blown the engine coupler? It is the two piece rubber coupler.


  2. #2

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    Quote Originally Posted by waterlover65 View Post
    Went to the lake this weekend, and my '94 SLT 750 had issues.
    1. WOT would not go above 57-5800 RPM. Ski seemed to run great otherwise, until......

    2. Right at the end of the day, my daughter got caught in a debris field. Ski would idle just fine, but would not go when giving throttle. Engine would rev up, but ski wouldn't go faster than idle. Sounded exactly like a boat with a spun prop. When we pulled it out of the water, I got underneath to check the impeller. There were 4 sticks about the size of a pencil jammed into the impeller. Could these sticks have caused that, or has it most liekly blown the engine coupler? It is the two piece rubber coupler.
    Since the engine is reving I would lean toward the coupler.

  3. #3
    Moderator beerdart's Avatar
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    Yes crap in the jet pump would cause cavitation and over rev..

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by waterlover65 View Post
    ...has it most likely blown the engine coupler?

    It is the two piece rubber coupler.
    When my own rubber coupler failed, it was very clear.

    When a rubber bonded drive shaft coupler goes bad

    Others have had less noticeable failures of the rubber coupler. Look carefully for circular cracks or little bits of black rubber shavings around the end of the coupler, or sitting in the bottom of the hull.

    It is also possible that the splines on one end or the other of the drive shaft have stripped, possibly from something getting stuck in the jet pump.

  5. #5

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    Thanks guys. I will take a peek when I get time. Right now, working 3 jobs, time is somewhat limited.

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