Results 1 to 10 of 10
  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
    Location
    guntersville Ala
    Posts
    336
    +1
    8
    look for smoke. where plugs fouled

  3. #3
    GoFastGuru's Avatar
    Join Date
    Jul 2010
    Location
    guntersville Ala
    Posts
    336
    +1
    8
    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
    Location
    Houston, Texas
    Posts
    12,801
    +1
    450
    Quote Originally Posted by paradigm56 View Post
    bump
    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?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Yamaha GP800 1999 Help - starting Problem
    By Shirley in forum Yamaha PWC Performance (2-stroke)
    Replies: 4
    Last Post: 09-04-2014, 02:47 PM
  2. Yamaha GP800 Engine Problems
    By drewman in forum Yamaha PWC Performance (2-stroke)
    Replies: 15
    Last Post: 08-20-2011, 10:55 AM
  3. 1998 Yamaha Waverunner Problem
    By Coupland350 in forum Yamaha Open Discussion
    Replies: 10
    Last Post: 06-27-2010, 04:01 PM
  4. F/S 1998 Yamaha GP800 in SoCal
    By sd964 in forum Yamaha 2 Stroke Skis
    Replies: 20
    Last Post: 07-30-2009, 06:28 PM
  5. WTB: Trim assembly for 1998 Yamaha GP800 Limited
    By JohnCiccarelli in forum Yamaha Classifieds
    Replies: 1
    Last Post: 03-09-2009, 08:18 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •