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  1. #1
    2000 pro 785 (son's) 1998 pro 785 (dads) old guy in mich's Avatar
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    towing in the water

    ok brain cramp, know i saw a post on this somewhere. does water indeed circulate thru the cooling system when towing. if so what do you clamp off to stop that? hasnt happened, but my concern is towing with a bad or blown water line and filling/shinking the ski.
    cheers
    hope i havent jinked myself dooooooooooo.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Actually, the main concern is water getting inside the engine. The stock Polaris exhaust system is 'wet', meaning it sprays water inside the exhaust chamber when then engine is running, thereby cooling the exhaust gas flow.

    When being towed, the jet pump can still develop enough water pressure in the cooling lines to inject water into the exhaust, but there is no exhaust gas flow to push that water out the back of the exhaust system.

    As the water accumulates in the exhaust, it can run back into the engine via the open exhaust ports, thereby risking serious engine damage. Especially if the engine is not immediately attended to after towing get all the water out, and the engine running enough to dry it internally.

    To avoid this problem during towing, you must clamp of one of two hoses. The main cooling water inlet tube from the jet pump (3/4" size, I think) can be clamped off using special hose pinch pliers. You can also rig up something using vice-grip pliers and something to flatten the hose, without damaging it.

    The alternate method is to clamp off the smaller hose that directly feeds the exhaust water spray fitting. You could even install a ball valve in that line, and label it 'Close for towing, open for normal operation".

    Of course, if the reason for the tow is a failed water cooling hose, then clamping (or having a large ball valve in) the main water inlet line would be preferred.

  3. #3
    2000 pro 785 (son's) 1998 pro 785 (dads) old guy in mich's Avatar
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    tought that might have been your original post, many thanks!!!!!!!!!!!
    hadnt ever considered the pessure build up. adding valves this week.
    ythe hulk rules.
    john

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by old guy in mich View Post
    thought that might have been your original post, many thanks!!!!!!!!!!!
    hadn't ever considered the pressure build up. adding valves this week.
    the hulk rules.
    john
    Some guys have installed their valves in such a way that the seat won't fit down with the valve in the 'water off' position. That way, they don't accidentally close the valve, then go riding later.

  5. #5
    2000 pro 785 (son's) 1998 pro 785 (dads) old guy in mich's Avatar
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    good idea, been known to be a dumb ass at times.
    as per ussual; a wealth of information. did i see you were selling your ski? what yah goin get?

  6. #6

    Pictures

    Does anyone have pictures of the setup with the vavle? I think that's a great idea about placing the valve so the seat will not go down. A picture would really help out. Anyone got this setup on a 750SL?

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by old guy in mich View Post
    ...did i see you were selling your ski? what yah goin get?
    I have two Virage TXi, and one MSX 140. I don't really have room for three, so one of the Virage TXi is for sale.

    In the meantime, I am riding it now and then, but I don't want to run the hours up on it (under 80 hours since new).

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by polaris 750SL View Post
    Does anyone have pictures of the setup with the valve?
    I think that's a great idea about placing the valve so the seat will not go down.
    A picture would really help out. Anyone got this setup on a 750SL?
    I think there is a picture around here somewhere, but it might not have been on a Polaris.

    There are a number of ways to do it, but one is to mount the ball valve up near the seat rim, such that the handle points straight up when the valve is closed (no water flow). The handle would project above the rim, thereby interfering with the seat.

  9. #9
    100 MILES OF HEAVEN AND I AM SMACK IN THE MIDDLE KEYZBUM's Avatar
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    Quote Originally Posted by polaris 750SL View Post
    Does anyone have pictures of the setup with the vavle? I think that's a great idea about placing the valve so the seat will not go down. A picture would really help out. Anyone got this setup on a 750SL?
    Quote Originally Posted by K447 View Post
    I think there is a picture around here somewhere, but it might not have been on a Polaris.

    There are a number of ways to do it, but one is to mount the ball valve up near the seat rim, such that the handle points straight up when the valve is closed (no water flow). The handle would project above the rim, thereby interfering with the seat.
    shazam
    http://www.greenhulk.net/forums/show...&postcount=267 GO BEERDART
    mattman

  10. #10
    2000 pro 785 (son's) 1998 pro 785 (dads) old guy in mich's Avatar
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    look at that setup, super clean!!!!!!!! leave it to matt to remember where all the cool sh** is.
    john

    ps what up with yamahoper? seduced away from the dark side?

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