Anyone ever seen a water pump impeller key wear like this?

Evan B

Bobber Downey Jr.
Staff member
Admin
From my Honda Bf225 outboard. The bottom one being the one that I just took off, top one being the new one.

Had to turn around on the Columbia River bar Wednesday with no water moving through the cooling system. Pulled it apart today and found the problem.

Anyone have any idea how that would happen? Want to do anything I can to prevent a repeat

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