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  1. #1
    seaobin's Avatar
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    SL750 back on the water

    http://greenhulk.net/forums/showthread.php?t=58087

    Ok, so Thanks to some help from everyone, especially Mattman and Tony, I got the stator replaced and have great spark again. Took her oout this weekend and ran roughly 48-50 on DOM at 6050 max rpm. All cylinders look a little lean, so i will richen up an 1/8 on the highs next time I go out.

    First question:

    Beerdart notes the 750 should max at 6300-6400 RPM in a few posts, but I am already teetering on the edge of lean already. What am I missing that will give me the extra 250-300 rpm's. I can get it to about 6150 but get real lean at that point.

    I just want a reliable machine, so i want to make sure that I am on the good side of the mix. (BUT, i dont want ot give up any power that I can safely get)

    Refresh on already done.
    New Fuel Lines
    New Fuel pump
    Clean Carbs
    New reeds --Torque reeds
    .5 over on all three cylinders
    WSM pistons
    Newish crank -1 yr old SBT reman (I know, i know)
    newly replaced stator
    Removed Water bar added pissers
    leak down test good
    grease on all intake seals
    rtv on all exhaust seals
    new br8es plugs
    copper seal on head gaskets
    new battery
    cleaned and lubed the electrical board
    cleaned and lubed the fuel switch
    pump looks good and is quiet when running, no binding
    lubed thru hull and zik fitting on drive shaft


    Things not changed yet, but thinking of:

    Stock Plate
    no sponsons
    stock pump-
    stock intake grate

    Thanks
    Last edited by seaobin; 07-07-2008 at 11:56 AM. Reason: spelling


  2. #2
    Moderator beerdart's Avatar
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    To get the RPMs up tweak the impeller or open-up the nozzle.

  3. #3
    seaobin's Avatar
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    So the rpm restriction is the energy needed to push the pump???? If I open the nozle, what model should I go to? Same with Impeller. Mine is all stock at this point

  4. #4
    Moderator beerdart's Avatar
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    You can take some pitch out of the Impeller with an adjustable wrench. To open the nozzle some have used a ridge reamer made for car engine work. Or have a machine shop open it up. Skat sell a nozzle with replaceable rings.

  5. #5
    seaobin's Avatar
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    so all i need to do is open it a milimeter or so? and are you tallking he pump or the black nozzle that does the steering?

  6. #6
    Moderator beerdart's Avatar
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    The fixed pump nozzle.

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