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Yamaha 30 hp

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  • Yamaha 30 hp

    I have a 1987 Yamaha 30 Hp that about 8 months ago I ran a compression test and all 3 cylinders were right at 125. The engine
    has not run in a while and today I put up on a stand and 2 cylinders are at 125 and one is at 60.

    what could be the cause of this?
    the engine has always been taken care of and is very clean, and I just had it painted and look like new.

    i’m stumped as to what happened

    20 Seacraft MA undergoing some work[br]
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