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  1. #1

    Engine identification

    Does anyone know how to identify type of engine. Is there a visible difference in a 587,657 and a 717 besides the bore size? New ski to me, Mag cover says 717 but single carb (seemed untouched) which has jets 125 main and 67.5 pilot. Only 587 and 657 engines show these jet sizes in the manuals (92-93). I need to make sure I'm getting what I payed for (the 717). Thanks

  2. #2
    96XPSS's Avatar
    Join Date
    Feb 2006
    Warner Robins, GA Home of the 2007 All-Star Little League World Champions!
    The jet sizes shown may be for a dual-carb setup. 720's, (or 717's to be exact) had single carb setups and dual carb, depending on the year.

    It sounds like you have the correct engine though.

  3. #3
    PEST!'s Avatar
    Join Date
    Jun 2008
    Rockledge Florida
    Its a 720 and they came with a single carb all the way up to the end depending on the model Ski. Dual carbs dont make that much difference on a stock ski and might aid in fuel economy

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