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  1. #1

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    GP1300 Overheating

    Hello everyone, I need some help, my 2003 GP1300 has been overheating the last two times out. When at wot for a long stretch it will overheat, and if it is turning a lot of rpms but not moving fast (for example: spinning around and things like that). I have a jet works kit installed with the regular valve not the pro valve, full stage II kit, race filter, milled head, island racing ride plate. I have checked every cooling hose for clogs, the pump strainer is clear, the jet works valve is not clogged and seems to be working properly. I do not recall sucking anything up, it just came up all of the sudden. I tried searching the forum but with not a lot of luck on the subject, any help is appreciated as always.


  2. #2
    Happily Self-Employed WFO's Avatar
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    how do you know its overheating?

    lights coming on?

    which light...
    water temp?
    engine temp?
    exhaust temp?

  3. #3

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    Yeah the temp light on the dash comes on along with the buzzer, the engine will not restart until it cools down approx 10-15 mins.

  4. #4
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    Quote Originally Posted by WFO View Post
    which light...
    water temp?
    engine temp?
    exhaust temp?
    ^

  5. #5

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    its the water temp light

  6. #6
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    Quote Originally Posted by GPR4EVER View Post
    its the water temp light
    do you have any water dumping overboard via external pisser?
    if yes, do you see the water coming out?

    have you removed the strainer to see if and debris is in the strainer or lines?

    tried another water temp sensor?

    you need to verify if in fact it is a water supply problem or electrical sensor problem

  7. #7

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    water is coming out, all water lines and strainer have been checked and are clear, the water coming out of the pissers is very hot

  8. #8
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    Quote Originally Posted by GPR4EVER View Post
    the water coming out of the pissers is very hot
    not uncommon for this time of the year

    tried another temp sensor?

    plus maybe the motor has a problem with a cylinder
    checked compression?

  9. #9

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    thanks i will check both

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