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  1. #1

    Default 40hp 3 cylinder with moisture on one plug

    ive got a 1993 40hp Yamaha 3 cylinder with 120 on compression on all 3 cylinder but im getting a little moisture on the bottom cylinder and feel sluggish once you get passed 3/4 throttle idles smooth and starts fine what would be he possible causes any ideas

  2. #2
    Join Date
    Aug 2017
    Location
    South Africa
    Posts
    108

    Default Re: 40hp 3 cylinder with moisture on one plug

    Welcome to the forum, can you please explain a bit more on how you are getting the moisture on the bottom cyl?

  3. #3

    Default Re: 40hp 3 cylinder with moisture on one plug

    I just replied to a different thread, similar engine and issue. Take a read:
    http://www.marineengine.com/boat-for...-at-full-power

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