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  1. #1
    '02GPRider's Avatar
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    1996 GTX Problems

    A friend of mine is bringing his '96 GTX over tonight to work on it. It's having an issue where the RPM's just drop by 1000 and then they come back up slowly. I'm thinking power-valves, but I'd appreciate any past experience on what to look for. Thanks!


  2. #2
    Moderator RX951's Avatar
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    RAVE:
    Find out when the last time the RAVE valves were cleaned.
    They can get dirty and gummed/carboned up and reduce engine power.
    I would start there first.

    fuel:
    Also replace the fuel filters if they have not been replaced in a while.
    Check to see if the fuel lines are not gummy inside too.

    compression:
    Do a compression check also to get a baseline of that motor.

    Rave valve cleaning:
    Here is a good information on how to clean those RAVE valves.
    http://saldman.tripod.com/Rave_valve/Rave.html

    You can clean the chisels on a wire wheel bench grinder.

    .
    .

  3. #3
    steach's Avatar
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    Yup, do those items first. If you still have the grey tempo lines they will need to ALL be replaced.

    There is another possible cause. The voltage rectifier may be going bad. To test, run the ski with the red wire from the rectifier disconnected. If the problem goes away than that is your problem. Note: the battery will not charge when running this way.

  4. #4
    '02GPRider's Avatar
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    Quote Originally Posted by steach
    Yup, do those items first. If you still have the grey tempo lines they will need to ALL be replaced.

    There is another possible cause. The voltage rectifier may be going bad. To test, run the ski with the red wire from the rectifier disconnected. If the problem goes away than that is your problem. Note: the battery will not charge when running this way.
    Not sure what you mean by "grey tempo lines".

  5. #5
    '02GPRider's Avatar
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    Does this wear indicate that the valve needs to be replaced?
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  6. #6
    Moderator RX951's Avatar
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    Nope.... thats typical / normal wear on that valve.

  7. #7
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    do What RX951 said

    I had a 96 that I had to replace the motor I had a fuel problem and after I repalced and cleaned everything I could think of it turned out my problem was the 20 dollar fuel selector switch it was clogged up so dont forget that part

  8. #8
    '02GPRider's Avatar
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    Talking

    Thanks for the info, guys. We cleaned up the Rave valves and re-installed. They definitely move better. His fuel gauge also wasn't working. We found that the bottom screen on the pick-up tube had fallen out and so did the slide magnet. Got that fixed, too. I'll tell him to change the fuel filters. Hopefully, we'll see if the ski runs right on Saturday. Too bad it only runs 50!

  9. #9
    Moderator RX951's Avatar
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    ~ditto to steach's and shhr's recommendations also

    Also, check this good article out
    http://www.sea-doo.net/techarticles/fuel/fuel.asp

    Also, did you get a compression check ?

    Did you Replaced Plugs and properly Gap?

    You may also want to Cut back plug wires about 1/16-1/4" if they are old or have many hours on them.

    Verified small ground wire at battery is ground well

    Open the rear black box and verify the condition of wires

    Make sure there is no obvious rust or corrosion or other obvious connection problems.


    Later down ther road you may want to:
    Pull carbs, disassemble, clean internal filters,checked needles and seats, make sure everything looks good
    Replaced fuel line from the front carb to the rear carb... and the fuel lines between the carbs to the return line.

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