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  1. #1

    1998 Yamaha gp800 problem

    so i took out my waverunner 2 weeks ago i started it up ran fine for like 2 minutes then would only go 5mph. so i took it rode back in and took it home next day i replaced spark plugs and fuel filter took it out started up fine went 40 turned around and it started doing 5mp again. anyone have any solutions here?

  2. #2
    GoFastGuru's Avatar
    Join Date
    Jul 2010
    guntersville Ala
    look for smoke. where plugs fouled

  3. #3
    GoFastGuru's Avatar
    Join Date
    Jul 2010
    guntersville Ala
    check pv servo make sure it cycles when shut off.if all checks out make sure you have tank pressure .and start cleaning fuel system .after compression test

  4. #4
    this is my first ski so am just getting my feet wet with trying to repair by myself . I have attached the picture of the old plug.

    How do i test the pv servo to see if it cycles? and if i does cycle how do i test fuel pressure? and what should i do for fuel clean up.
    Last edited by paradigm56; 06-20-2011 at 02:43 PM.

  5. #5

  6. #6
    Happily Self-Employed WFO's Avatar
    Join Date
    Nov 2005
    Houston, Texas
    Quote Originally Posted by paradigm56 View Post
    check compression?

  7. #7
    Doing compression test today what numbers should except?

  8. #8
    128 compression in each

  9. #9

  10. #10
    Was it over heating?

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