1994 Kaw 650SC Overheated
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  1. #1
    PWCToday Newbie
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    1994 Kaw 650SC Overheated

    I had a new SBT 650 engine installed on our beloved Surf Couch and on the first launch, breaking in the engine with a double dose of Kaw oil and only going at idle speed per instructions, we ran over/through some weeds. More than I thought, apparently. Because we were only at idle speed I didn't notice that it was requiring more throttle that normal required to maintain idle speed until it was too late and it stalled. Burnt rubber-smelling smoke plumed out and we towed it back to the ramp to cool. Next morning I discovered the intake grate had no apparent "grates" to filter weeds, and they had wrapped tight around the shaft. I cut them away and put the 'ski in the water on the trailer at the ramp and it started and seemed to idle and run fine, except for drips of water coming from the rubber exhaust pipe boot. The exhaust pipe surface itself is now more bronze colored than silver, leading me to think it got overheated and maybe the rubber boot was hot and smoking? Can I just tighten the hose clamps and see if that stops the drips? What else might have been damaged that I should check? Finally, what kind of intake grate do you guys recommend if I am to continue to use the 'ski in a lake with some late season weeds? Thanks in advance for any advice.

  2. #2
    Top Dog orangefinger's Avatar
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    Re: 1994 Kaw 650SC Overheated

    tighten down or replace rubber coupler....in general stay away from weed other than the one u smoke :0)
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  3. #3
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    Re: 1994 Kaw 650SC Overheated

    Quote Originally Posted by orangefinger View Post
    tighten down or replace rubber coupler....in general stay away from weed other than the one u smoke :0)
    Thanks OF. Is there any other damage that I might have incurred other than compromising that rubber boot? Do they make an intake grate for the SC's that blocks weed I don't want (while still allowing me to inhale those that I do?)

  4. #4
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    Re: 1994 Kaw 650SC Overheated

    SBT used to put heat tabs on the engines they sold.

    Intake grates stop hands and feet, weeds not so much. If I was going to be riding in vegetation like that I would want a strainer and a pisser where I could watch it.

  5. #5
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    Re: 1994 Kaw 650SC Overheated

    Quote Originally Posted by generaldisarray View Post
    SBT used to put heat tabs on the engines they sold.

    Intake grates stop hands and feet, weeds not so much. If I was going to be riding in vegetation like that I would want a strainer and a pisser where I could watch it.
    Newbie here, GD. What are heat tabs, strainers and pissers?

  6. #6
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    Re: 1994 Kaw 650SC Overheated

    Quote Originally Posted by daniel1123 View Post
    Newbie here, GD. What are heat tabs, strainers and pissers?
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  7. #7
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    Re: 1994 Kaw 650SC Overheated

    Quote Originally Posted by daniel1123 View Post
    Newbie here, GD. What are heat tabs, strainers and pissers?
    The heat tab melts if the engine gets to hot. Engine builders put them on so they can tell if the engine was ran hot for warranty claims.

    Strainers strain the water for debris

    pissers piss out the side or back of the ski so the rider can know if his cooling systems flows or not. No water flowing out the pisser and you have a blockage

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