One concern would be when having to plow a little in bad seas or even in fairly rough seas the water coming in the thru hull.
If you are dead set on doing it, see if there might be a scupper that might fit over the thru hull. Maybe the ping pong ball type?
Would a bigger pump serve the situation better?
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse
Benny
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