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  1. #1
    1993SL750's Avatar
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    SL750 - Proper cold start

    Just bought a 93 SL750. First jet-ski ever.... don't know anything about them. Searched the web and found this forum, this is where I'm staying! lots of good information. Read enough to feel comfortable to start it out of the water and yesterday did the first water run. WORKS GREAT, only problem I have is that it will not start after it has been sitting for a while (few days to a week). Pour some mixed fuel in the 3 cylinders and she fires right up, and then all is good!!!
    What is a correct way to start a Fuji 750 engine????
    Don't have a manual, Owners or Shop and would love to get a hold of both.

    Links on this site for Polaris manuals is not working...........

    Any help is appreciated.
    I will start to do suggested modifications to the original fuel system, 3 outlet pump and removal of fuel shutoff is probably a good start. This may also help the COLD start issue where it will not fire?
    Thanks again for lots of good reading


  2. #2
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    I just pull the choke and work the throttle on mine and it starts pretty quickly.

  3. #3
    1993SL750's Avatar
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    I tried to pull the throttle while starting, without working the throttle, and nothing happens. Pulled the pluggs and they are wet. Next time I will try to just work the throttle.....
    I would think every machine is a little different, but is there a recommended COLD START procedure in the owners manual? Once started it easily starts again.
    Still looking for both an OWNERS MANUAL and SHOP MANUAL

    Have not done any mods to it yet. Only modified the trailer (beach dolly) where I replaced the plastic rims, tires and axle with a 1" standard trailer axle with real bearings and put 2 golf cart wheels/tires on it. Now I feel comfortable pulling it the half mile I need to go to get it in the lake!

  4. #4
    1993SL750's Avatar
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    OK.. here are two pics
    One on the SL750 and one on the modified PVCTrailer



  5. #5
    thester71's Avatar
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    Pull choke+ press start button = vroooom
    Also if you look hard enough the manual might be closer than you realize hint hint

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome to the Hulk

    Get the entire fuel system cleaned up and upgraded, and you will find it starts fairly easily, hot or cold.

    Choke should only needed for cold starts once it has been sorted out.

    Some guys prefer using a fuel primer injection system instead of choke. Primer does work well, and some guys only prime one or two cylinders. Once the engine starts, the other cylinders will come on line pretty quickly.

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by 1993SL750 View Post
    ...removal of fuel shutoff is probably a good start...
    Replace or rebuild the fuel shutoff valve, don't simply delete it.

    It provides an important safety function.

    If you remove the valve for testing, don't continue to ride it that way. Pressurization of the fuel tank while the ski is sitting can cause fuel to be forced through the carbs into the engine, creating a dangerous situation.

    Turn the fuel selector valve off when not riding.

  8. #8
    1993SL750's Avatar
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    Is there a replacement part available for the automatic fuel shutoff valve?
    It has been suggested on other threads to remove the original AUTO Shut-Off Valve but no replacement is suggested/advised?
    I will try to start with just working the throttle tomorrow.
    Thanks for the input

  9. #9

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    Try this. It's for a seadoo but it works.http://www.denniskirk.com/jsp/produc...fCatId=&mmyId=

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by 1993SL750 View Post
    Is there a replacement part available for the automatic fuel shutoff valve?

    It has been suggested on other threads to remove the original AUTO Shut-Off Valve but no replacement is suggested/advised?...
    Just to be clear, the auto-cock automatic shutoff device IS to be deleted. The auto-cock looks like a small fuel pump, located next to the actual fuel pump.

    The MANUAL shut-off valve that you use to turn the fuel ON-OFF-Reserve is to be retained/replaced/rebuilt.

    There are replacements for the manual valve available from Yamaha and Sea-Doo, depending on whether you have a Reserve position or just ON and OFF. Part numbers and such can be found through my signature links.

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