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  1. #1
    hawkrdr's Avatar
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    How warm is too warm?

    Question has to do with water temps.
    I ride alot in a fresh water lake that during the summer months gets to be about as warm as bath water. It is a fresh water lake in florida.
    While I have not measured the water temps yet this year, it has gotten up into the 80 degree to mid 80 degree range in the past.
    So with an engines that rely on cooler water running through them to cool, how warm can the water get before it can be dangerous to ride the ski on?

    The lake gets warm enough that even when the temperature is in the upper 90's air wise, the water is not refreshing.....


  2. #2
    Duke's Avatar
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    I don't believe its going to hurt anything. Last year in Morgan city the water temps were 98+ and all the boats seemed fine. I was on a ported GPR.

    The St Johns sees upper 90s all the time and we ride there every weekend.

  3. #3
    gp1200rrk's Avatar
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    water temps in the 90's, crazy!

  4. #4

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    My lake gets up to 90 in the summer - there is alot of volume running through a ski motor, you don't have anything to worry about. It takes alot to overheat a motor, and hot lake water won't do it!

  5. #5
    GTI SE 155
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    Automobile engine coolant is in the 190 degree range when warmed up, and is designed to run at that temp. Even with a Sea-Doo closed-loop system, that water temp has to be over 150 degrees (anyone ever put a thermometer to the coolant?). Having even 100 degree ocean/lake water would not appear to be a problem.

    Related to this, do non closed-loop systems have some sort of themostatically controlled valve or such in the cooling passages that lets the engine warm up to a proper temp, then opens water passages to the engine as needed? Like a thermostat on a car?

  6. #6
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by fastexas View Post
    Automobile engine coolant is in the 190 degree range when warmed up, and is designed to run at that temp. Even with a Sea-Doo closed-loop system, that water temp has to be over 150 degrees (anyone ever put a thermometer to the coolant?). Having even 100 degree ocean/lake water would not appear to be a problem.

    Cant really compare water to anti-freeze or open loop to closed loop...
    anti freeze has a higher boiling point than water, and only while under pressure

    Related to this, do non closed-loop systems have some sort of themostatically controlled valve or such in the cooling passages that lets the engine warm up to a proper temp, then opens water passages to the engine as needed? Like a thermostat on a car?
    Never seen one on a Yami, or SeaPoo open loop.
    Polaris has an open loop with a thermostat.

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