Results 1 to 6 of 6
  1. #1

    New Member with an Odd Problem

    I have a 95 SLT750 I got from an old friend tired of throwing money and time into it. He owned it a couple of years and maybe changed the plugs once! He might have even greased it once. He put in a new battery this Spring and when he started it with hose hooked up it would just go wide open. I looked it over for him once and all the carbs and throttle cables are working normally. Only ran a couple of times for few seconds each because of the WOT on the trailer. This is my first ski but I am a GM mechanic and have owned, raced, and rebuilt many 2 stroke singles(YZ-KZ-RM 250's)and have never seen this kind of problem. I downloaded the manual and will post compression/fuel pressure soon. Gas is new, removed diaphragms and inspected and checked the needle/seats. I plan on rebuilding the carbs and updating to triple pump and premix.


  2. #2
    ph2ocraft's Avatar
    Join Date
    Apr 2006
    Location
    Campbell, Ca.
    Posts
    14,100
    +1
    105
    Hi Pryor, WELCOME tothe Green Hulk Forums.
    I have 2 possibilities.
    Lean running
    Air Leak

    If it were mine I would start it and leave the choke on as it will bring the RPM's down. If you have a primer, keep priming it and the extra fuel will keep the idle down.

    You can also start it on the trailer with the pump in the water (under load) and let it warm up and see where your idle is (1200-1350RPM in the water).
    If it warms up and the idle settles down it's probably a lean running condition.
    Check and replace all the fuel line
    Check and replace the fuel pump
    Make sure the carbs are clean and fresh with no blockage.

    Let us know what you find.

  3. #3
    100 MILES OF HEAVEN AND I AM SMACK IN THE MIDDLE KEYZBUM's Avatar
    Join Date
    Apr 2007
    Location
    JUST NORTH OF CUBA-- FL,KEYS
    Posts
    2,556
    +1
    39
    WELCOME TO THE HULK
    ------dam i type way 2 slow----when i started this post nobody had responed man 10 min 2 type this crap----------
    I am the local HACK here
    Just sounds like an air leak 2 me
    cheak all the bolts on the intake/reed casing
    and i want to say there was a rubber plug on 1 of the intake tubes (like it was for sync sticks from motorcycle tuneing)
    look around real well and take some photos
    enjoy and have fun
    mattman
    Last edited by KEYZBUM; 06-21-2008 at 10:19 PM. Reason: type 2 slow

  4. #4
    After talking to the previous owner again last night it sounds like he did not winterize the cooling system properly! I did try putting the pump in water with the choke on and I could keep the idle down to a manageable level but would return to WOT as soon as it was turned off. Ran for a total of 4-5 minutes and was running very rich. I plan on tearing down to look for bad gasket or possibly a crack due to the new info of improper winterization. Thanks for the great feedback and I will post my findings soon.

  5. #5
    ph2ocraft's Avatar
    Join Date
    Apr 2006
    Location
    Campbell, Ca.
    Posts
    14,100
    +1
    105
    Yep, sounds like a massive air leak, pressurize the engine and let us know what you find.
    Good Luck!!

  6. #6
    Moderator RX951's Avatar
    Join Date
    Apr 2005
    Location
    League City, Texas
    Posts
    16,066
    +1
    23
    welcome to the forum

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. new member with problems lol
    By rockfishsmartie in forum Yamaha Old School Skis
    Replies: 5
    Last Post: 08-19-2011, 03:56 PM
  2. New Member with GP1300R Questions
    By RVCop in forum Yamaha PWC Performance (2-stroke)
    Replies: 13
    Last Post: 12-07-2007, 08:22 AM
  3. Hi New member with 96 Yamaha
    By flexfan in forum Yamaha Open Discussion
    Replies: 0
    Last Post: 08-08-2007, 03:18 PM
  4. New member with 07 FX Cruiser (NOT H.O.)
    By YamahaMan in forum Yamaha Open Discussion
    Replies: 3
    Last Post: 06-06-2007, 07:54 PM
  5. New Member With Some Questions :)
    By ADAMBOMB in forum Sea Doo Open Discussion
    Replies: 33
    Last Post: 03-12-2006, 05:08 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
  •