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Thread: Gp1300R

  1. #1
    AWA MEMBER
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    Gp1300R

    My buddies ski runs fine on the trailer but when he puts it on the water under load it boggs out and don't run right.



    I believe it has a EFI controler on it, but has been there for a few years with no issues


  2. #2

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    Could be alot of things. Need more info on mods and such.

    But you could disconnect the EFI controller just for a test run and see if it changes any.

  3. #3
    007GPR08's Avatar
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    Rick,
    LOVE the towel

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    L Carlson's Avatar
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    Quote Originally Posted by Ronn25 View Post
    Could be alot of things. Need more info on mods and such.

    But you could disconnect the EFI controller just for a test run and see if it changes any.
    +1 first look at the led lights on the controller to see if they are all functioning properly.

  5. #5
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    Quote Originally Posted by Ronn25 View Post
    Could be alot of things. Need more info on mods and such.

    But you could disconnect the EFI controller just for a test run and see if it changes any.



    its pretty much stock except the Riva controller

  6. #6
    seized cylinder. happened to me many times. trailer u can rev it under water u cant go over 4-5k rpms.

  7. #7
    onefastgpr619's Avatar
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    have you tried checking the compression

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    Mik72e's Avatar
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    Check comp +1

    Also has it got a D plate or not

  9. #9
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    Quote Originally Posted by onefastgpr619 View Post
    have you tried checking the compression




    When he put it in the water it will run good for like a 100 yards then blah blah.

    on a side note he has a minor exhaust leak, but we tried riding it with the seat off, still the same thing, we unhooked the riva controller and it ran worse.

    I will tell him to check comp. what should it be......the motor has never been rebuilt, It has a milled head

  10. #10
    Mik72e's Avatar
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    125psi there about across all 3 cylinders most import that all psi reading are as close as possible the correct way is leave plugs in teh other 2 x cylinder and pull the throttle wide open when cranking do get your reading.

    Make sure you take the leads off the other 2 cylinders

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