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  1. #1

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    Need help with carb on a slx 780 please

    Hello guys i think the carb on my jetski are out of mesurement or w.e you guys call it doesn't work when i go slow it will turn off sometimes.


    how to regulate the carb? to have it running perfect.


  2. #2
    ph2ocraft's Avatar
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    Go to the tech section and check out Fuji Fuel, the tech information is there along with some useful tips on your ride.

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Welcome to the Hulk.

    What year SLX is it?

    Have the carbs ever been cleaned/inspected?

    Have you messed with the carb adj screws?

    Did try removing the spark plug boots and cutting the wires back about 1/4" to expose clean wire? Then resecure the spark plug boots.

  4. #4

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    it is a 1996 and i havent done nothing to it i just bought it like that and all i have done is replace the sparks and nothing. it idles a low revolution

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Remove the carbs and do a thorough cleaning/inspection of them.

    Set the adj screws to factory settings.

    Replace the fuel hoses.

    Clean/inspect the petcock

    Then cut the spark plug wires back as mentioned above.

  6. #6

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    what are the factory setting for this jetski?

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    1996 SLX 780

    Main jet #110
    Slow jet #67.5

    Hi sped scew M=1 1/8 C=7/8 P=1 1/4
    low speed screw 1 3/8
    idle speed in water 1250-1300 RPM
    Needle/seat pop off 20-24 psi

  8. #8

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    where is main jet and slow jet? and where are all this screw at? and please how to adjust them im a newbie

  9. #9

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    Hi sped scew M=1 1/8 C=7/8 P=1 1/4 where this 1?
    low speed screw 1 3/8 --- where this 1?
    idle speed in water 1250-1300 RPM ----- i think this is the 1 that is on the end and when move will increase or decrease acceleration when idle
    Needle/seat pop off 20-24 psi--- location? and what exactly u mean?

  10. #10
    bowsniper's Avatar
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    Quote Originally Posted by cubajorge2008 View Post
    Hi sped scew M=1 1/8 C=7/8 P=1 1/4 where this 1?
    low speed screw 1 3/8 --- where this 1?
    idle speed in water 1250-1300 RPM ----- i think this is the 1 that is on the end and when move will increase or decrease acceleration when idle
    Needle/seat pop off 20-24 psi--- location? and what exactly u mean?


    1. the upper screws are the highs
    2. low screws on each carb below the high speed ones
    3. idle---perfect! 1250-1300 rpm's
    4.yes, that is the idle adjustment for all the carbs. they are tied together but each carbs needs to tuned like 3 seperate engines.
    5.There is a provedure in the tech section on testing pop-off pressure
    6.The "pop-off pressure is the amount of pressure it takes to lift the needle off the seat inside the carbs. you use a mighty vacumn gauge and pump it up till the seats pops off.. hense, the term "Pop-Off"

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