'91 kawasaki sc full throttle problem weird

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  1. #1
    PWCToday Regular
    Join Date
    Jul 2018
    Coastal, NJ

    '91 kawasaki sc full throttle problem weird

    Hi, When I'm on the water and hit throttle for full speed, sometimes I get it and sometimes I don't. Nothing wrong with cable. You can hear that motor just won't turn up. Probably getting about 3/4 when it doesn't turn up all the way. Might get full throttle several times or just once. Comes and goes. In driveway hooked up to water, problem gets weird (er). "idle speed" starts to rise alot without me doing anything, squeeze trigger, no throttle up, but as soon as release trigger, idle goes back down some, then starts back up again. Squeeze trigger, no response but idle goes back down. Eventually, idle goes all way back down where it should be and full throttle response. Will stay that way for rest of flush.

    So far I have: had carb professionally rebuilt, cleaned out fuel tank, cleaned pick up screens, blown out all fuel lines, replaced cdi. No help; problem still there. Any thoughts are appreciated

  2. #2
    PWCToday Guru
    Join Date
    Sep 2014

    Re: '91 kawasaki sc full throttle problem weird

    sounds like you have an intermittent lean issue. Crank seals may be toast
    '92 750sx
    '96 750sxi
    '89 & 92 X2
    '91 SC-750 bp swapped
    '07 Ultra LX w/1200 yamaha triple

  3. #3
    Attention ***** PWCToday.com Is My Home Away From Home JonnyX2's Avatar
    Join Date
    Jun 2006
    Sin City USA

    Re: '91 kawasaki sc full throttle problem weird

    ^ that was my thought as well. The fuel selectors on Kawis tend to go bad (after 20 or so years), you might try to bypass the switch and take your line directly from tank to carb, to at least rule that out.
    Quote Originally Posted by Firebird A/C&Heating View Post
    OMG.....Rules for 550 vintage ski class...550 ski riders do not conform to any kind of rules. That is why you are riding a 550 ski in the first place. Rules suck....
    PS...the rule book will be in my 550 pump
    Quote Originally Posted by WB1994
    Listen , stop your cryin' , its only an X2.

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