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  1. #1

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    99 xl1200 ltd. stalling unsure why

    ok so the issue i'm having is simple and after looking and reading a lot of
    threads on here and trying some of the ideas others did, i still have the
    same issue which is when i start the ski it starts runs at idle perfectly i go
    to give it gas it runs up to about 7-10mph then boggs down and starts to
    stall if you catch it in time it just idles and you get a nice back full of
    water.

    so i tried going very easy on the throttle at say 7-10mph until the ski
    starts to get up on a plane and then it goes no problem but the second
    the ski gets out of a plane same issue, UNLESS i run the ski WOT for like a
    few minutes(1-2 miles) then it gets going with no issues i can do 360's
    and have plenty of fun.

    so i take a break 10-15 minutes with the ski beached go to jump back on
    it and same issue as above have to wait for it to get on the plane etc.

    recently when i ran the ski it didn't seem to be taking in as much oil as i
    thought it might need so i have blocked everything off and removed oil
    pump etc. but while i'm at it incase not enough oil getting in the engine
    was causing the stalling issue i would like to know any suggestions before
    i put the exhuast all back on. Carb adjustments, things to check?

    I'm fairly good with working on engines of a 4 stroke nature, tuning carbs
    is a whole new world to me tho. so any is greatly appreciated.


  2. #2
    If your not doing something, its hard to screw up. stlouisramsfan's Avatar
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    has the carbs been rebuilt recently? what about drilling the tamper caps and installing t-handles on the high and lows?

  3. #3

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    i bought the ski about 3 months ago, had it out like 4 times everything
    seemed fine except this one issue all 4 times.

    i don't think the carbs have been rebuilt/but i could be wrong since one of
    the pistons went bad on the previous owner and he had a dealer replace
    the engine under warranty.

    i could do the t-handles what is the main advantage i see everyone doing
    it but don't understand the main reason for doing it, someone have a post
    you can give me a link to read?

  4. #4

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    Its a fuel issue, and if the boat did at one time not do it, then its probably a fuel pump problem(creased check valves), or a fuel tank that is not sealed anymore. If when you let it sit a while, and then take the gas cap off, it should have pressure on it. This pressure helps supply fuel on the low speed end. Any leaking fittings, tank vent check valve, ect. will let this pressure bleed off. I wouldn't go cranking on the needle settings if they used to be alright. With the age of the boat, a carb rebuild is probably in order anyway, new carb filters and clean up of everything. My "01 had the best of care, and the carbs were still a bit dirty inside the fuel side.

  5. #5

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    LT1GMC Thanks!

    The previous owner said he didn't have this problem but he hadn't ran the
    ski in water for like 6 months before i bought it.

    Upon getting the ski home the first time i noticed that the fuel cock only
    had one line going to it and that what i think is the reserve line in the tank
    is going right to the carbs, the other lines are going to either the return
    from the carbs or a filter at the very from of the ski(not sure what that is)

    is there another way i can hook all this up to not use the fuel cock
    outside of doing the fuel tank clunk mod to the tank?

  6. #6
    Moderator OsideBill's Avatar
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    I agree with LT1 fuel related, possible causes are creased check valves, plugged internal or external fuel filter, loss of pressure in the system or bad fuel selector switch. Iwould check all the external stuff then do the carbs. if it has been a while I would clean and rebuild them.

  7. #7

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    OsideBill Thank you sir. Was hoping you would chime in i see your posts EVERYWHERE

    only question i suppose for the fuel lines is what does each of the
    numbers goto below and can any of them be not used and plugged? the
    arrow is pointing to the back on the original persons post


  8. #8
    Moderator OsideBill's Avatar
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    Quote Originally Posted by BadBoyBill View Post
    OsideBill Thank you sir. Was hoping you would chime in i see your posts EVERYWHERE

    only question i suppose for the fuel lines is what does each of the
    numbers goto below and can any of them be not used and plugged? the
    arrow is pointing to the back on the original persons post

    (1) is the vent, allows air to come in. has an inline check valve on the hose that feeds it.
    (2) return line from carbs
    (3&4) on and reserve have to check which is which. these go to selector knob.

    You could plug the 'on" line then run the reserve through the filter which in turn feeds the carbs. This effectively removes the selector switch. You have to plug the line securely as the sytem does pressurize.

  9. #9

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    Thanks, i'm going to plug off the on line because right now it's going to
    the fuel cock but none of the other 2 inlets on the fuel cock have lines or
    plugs on them. Do you think that could be my issue since the system has
    to build pressure?

    Never the less, i went and bought the rebuild kits for my ski and this
    morning took the carbs off but they look OK to me but then again i don't
    much about what looks good or not. see my pictures below of all the parts
    i took out,, i haven't replaced them yet should i? or can i save myself the
    160.00 i paid for all three sets














  10. #10

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    ok so i did all 3 carbs and they all look the same as the photos above,
    none of the diaphrames are broke or seem like they need replaced, but
    again what do i know

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