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  1. #1

    gas and oil line/carb ?'s

    ok so i am new to jet ski's and have a few questions

    i have three fuel lines hooked to my carb. 1 from fuel selector, one straight to gas tank, and one to the motor?
    what is the purpose of the line to the motor and the one from the tank? my flow comes from the selector correct?

    Took the ski out to the lake and it seemed like it wasn't getting good flow would idle all day long but wide open for only and 4 seconds before it cut out so I took the carb off and cleaned what i could but now i can't get it to prime. any tips since there is not a priming bulb.

    thanks


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    The fuel system on all Polaris PWC pumps the fuel in a loop.

    Fuel comes from the tank to the fuel pump under suction, through the fuel selector valve and fuel filter. Then it exits the fuel pump runs through the carbs.

    Note: On the domestic engines, the fuel pumps are built into the carbs (front and rear carbs on three carb engines).

    There is a fuel exit from the carbs, through a flow restrictor, and then the fuel returns to the tank through the fuel return line.

    The fuel pump is powered by vacuum/pressure pulses from the engine crank case. That would be the hose that runs from the side of the engine up to the fuel pump.

    If your carbs have not been cleaned and rebuilt, then you should do so.

    To speed up the fuel pumping through dry fuel lines, you can prime the carb throats with a small amount of pre-mixed fuel+oil (2-stroke oil).

    The engine should start fairly quickly and burn through the fuel prime. Don't stand over the carbs, just in case of a backfire.

    After doing this a couple of times, the fuel system should have pumped some fuel into the carbs, and it should then start and run normally.

  3. #3
    Mossmadnes
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    need help

    have 94 slt750
    on the fuel pump
    it has a little pump it looks like
    hooked to it
    looking for a diagram to hook it up corectly as it is not

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by mossmadnes View Post
    have 94 slt750
    on the fuel pump
    it has a little pump it looks like
    hooked to it
    looking for a diagram to hook it up corectly as it is not
    Does it look like this?




    If so, remove it and throw it as far as you can. For real!!!!

  5. #5
    Mossmadnes
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    yes it does what do i do with the hoses where do i attach them

  6. #6
    Mossmadnes
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    and what is the brass thing
    to the right in your pic

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Did you click the link in my signature yet?

  8. #8
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    The best thing to do is get the triple outlet fuel pump, and replace the stock single outlet type.

    Then use this diagram.


    That brass piece is the restrictor. It is installed in the return hose going back to the gas tank. It's about 3/4" past the last carb, INSIDE the hose.

    IT MUST BE RE-INSTALLED!!! That's what creates your fuel pressure.

  9. #9
    Mossmadnes
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    thanks guys
    k477 that link is awesome!!
    going to order a tripple from zigler asap....

  10. #10
    Mossmadnes
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    hey guys another question
    i ran it for a bit yesterday and it seams like the plugs are always wet
    ran the ski (dried the plugs) ran it again and again plugs where wet
    any ideas?

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