Results 1 to 3 of 3
  1. #1

    Question 1998 XP Mid Bog Issue

    Hi all

    I have a 1998 XP 951 that has a mid range permanent Bog.

    My wife rides the ski at 4k-5k RPM (about 20 KLMS) and after about 20-30 minutes it bogs down even if she tries to hit the throttle 100%. The bog is so bad that even full throttle does nothing to recover it. You have to either back off and go flat out again or restart the ski.

    I ride the ski WOT and its fine and if I back down to 4k-5k it does the same. Kind of surges.

    I told her to ride flat out and she just stared at me

    What could this be and where would I start to TUNE this out?

    • Carbs and Engine are rebuilt.
    • Carbs have OEM setting 1 1/4 Turns Low and Mag 0 & PTO 1/4 high
    • The ski takes off fine when warmed up (could do with some fine turning)
    • The ski runs like a beast at WOT
    • The ski idles at 3000 out of water and 1500 in water
    • Motor is still new so we have oil in the tank and injection as per Seadoo;s recommendations
    • POP off on both Carbs 22-23 PSI
    • Same compression both pots
    Thanks in advance!


  2. #2
    Chrisx88's Avatar
    Join Date
    Oct 2018
    Rochester NY
    If the ski is being ridden at constant 4-5k for 20 mins like you said, it could be loading the plugs up with the added oil in fuel. You shouldnt ride a new engine at constant RPM anyways when breaking in new motor.

  3. #3
    Check the water regulator on the waterbox. If that is leaking or has a broken or missing spring then that could be messing with you.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 99 GP1200 mid range bog issue
    By powerstroke250r in forum Yamaha Old School Skis
    Replies: 3
    Last Post: 04-22-2018, 07:38 PM
  2. Zxi 750 mid range bog
    By CaptaimBosco in forum Kawasaki Projects
    Replies: 2
    Last Post: 07-13-2016, 10:55 PM
  3. 95 sl 650 mid-range bog
    By patcmontgomery in forum Polaris Open Discussion
    Replies: 0
    Last Post: 07-11-2016, 09:22 PM
  4. 40mm carbs on 1996 sl900 slow to mid bog
    By sandonut in forum Polaris Open Discussion
    Replies: 12
    Last Post: 06-27-2014, 09:01 PM
  5. 98 GP 800 - Runs at idle to mid and than full bog
    By jchale in forum Yamaha Old School Skis
    Replies: 21
    Last Post: 06-13-2011, 04:37 PM

Posting Permissions

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