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  1. #1
    rob2337's Avatar
    Join Date
    Jun 2007
    Montréal, Québec Canada

    Building 580 Yellow Engine - Compression Question

    I am building a 580 Yellow Engine for a friend. He wants the ski on the water for real cheap. We bought it with a bad crank and piston, so we are slowly building it up with used parts we find locally and on e-bay.

    The ski will be used just for cruising around.

    My question is about compression. Someone told me that when you buy a SBT engine, they lower the compression for the fact that they use questionable parts, people use questionable gas, and for added reliability. ( Don't want to get into a discussion about SBT engines)

    Should I try to lower the compression on this unit by doubling up on the cylinder base gaskets? I really don't care if I loose power, just looking for a slow bullet proof ski that can run regular gas.

  2. #2
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
    Join Date
    Aug 2007
    Tampa Bay, FL
    I'd just use the thickest base gasket... probably not a good idea to use two gaskets! SBT engines are junk!

  3. #3
    water worx's Avatar
    Join Date
    Aug 2006
    Sunny Fla,Ft Pierce
    Just put it together,it will be fine.

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