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  1. #1
    jcjw1998's Avatar
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    Aug 2010
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    Need carb settings for pro 785!

    Guys,
    I recently aquired a 97 pro 785 and it is scary fast but I believe I need to make some carb adjustments. I have a freind that mentioned a good starting point was to close both the low speed and high speed screws then turn each of them out about 1 1/2 turns. I did that and it runs good but it seems to only have 2 gears... idle and full throttle. I would like some more throttle range so does anyone have the proper settings for these carbs? Also, this thing uses more gas than any combustion engine I have ever seen in my life. Could this be due to not having the settings correct or I am just supposed to expact that with this particular ski?


  2. #2
    skigolfnut's Avatar
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    Jun 2009
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    the 1997 pro has 2 factory stock settings for the pro 785,
    jetting option 1
    82.5 pilot jet(all)
    High speed screws 0 turns out from lightly seated
    Low speed screws 1-3/8 turns out from lightly seated
    jetting option 2
    85 pilot jet(all)
    High speed screws 3/4 turns out from lightly seated
    Low speed screws 1/2 turns out form lightly seated
    It all depends on your ski,

    do you have any mods? bone stock? how long did it sit before it ran?
    What octane are you using? pre mix? oil tank still hooked up? fresh spark plugs? humidity, sea level?
    so many paramaters for the pro, they are many many post here on the Hulk for the pro 785,

    I race a 98 pro 785 limited version and I have Matt at Genes poweresports tune it about 3 times a year, But that is just for racing
    My pro stocker 1997 is a real bear, no mods what so ever except a 6 vain stator,
    The Pro 785's are made for closed course bouy racing,
    get it running good and there are plenty of races in Dallas in region 5,
    they are not very many 800cc class jet skis racing any more

  3. #3
    jcjw1998's Avatar
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    Aug 2010
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    do you have any mods? bone stock? how long did it sit before it ran?
    What octane are you using? pre mix? oil tank still hooked up? fresh spark plugs? humidity, sea level?
    so many paramaters for the pro, they are many many post here on the Hulk for the pro 785

    Thanks for the repy,
    1. No mods
    2. Has not sat for much time at all
    3. Using 93 octane
    4. Oil tank hooked up.. no premix
    5. Plugs are new.. NGK BR9ES
    6. Dallas is very humid
    7. Not sure the sea level here

    One last dumb question.. how am I to know the difference in the two options you gave? 82.5 pilot jet and 85 pilot jet??

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Oct 2006
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    PRO 785's are real gas hogs. Get used to it......

    You'll need to open up a carb to see what jets are in it. Then you will need to set the carb settings according to that.

    Do yourself a favor and NEVER listen to that buddy again when it comes to the 785.

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