Re: 1976 Evinrude 15 hp 15604A

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April 13, 2016 at 1:07 pm #34767
Casey Lynn
Participant

    US Member

    There are lots of holes in outboard midsections designed specifically to drain off water that could potentially freeze and crack your mid section castings.
    Do not plug these holes up. What you are describing is probably one of them. You will see alot of them doing their job while running an engine on a hose or barrel.