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I've decided that during the remodeling/refitting/re-gelcoating of my 17' cc Whaler it'll be a good idea to install a thru hull baitwell/washdown pump. While pondering the deck area alongside the stern opening of the rigging tunnel, which is already cut open for other purposes, I had this idea; as follows.

Alongside the rigging tunnels stern opening make another opening of a size adequate to install a "box" made to accept the following: 1) A small thru hull baitwell pump. 2)A thru hull sonar transducer. 3) A bilge pump. The "box" would be 3/8" baltic birch plywood encased in 3 coats of West System epoxy. The sealing of this box to the hull and to the side of the rigging tunnel would be accomplished with West Systems thickened epoxy. The sealing of the box to the deck would be accomplished with epoxy and 4 ounce fiberglass cloth.

I would especially appreciate guidance on an appropriate 3/4" NPS thru hull fitting and on thruhull bait pumps.

I have the skill-set to accomplish this project but would like to hear from anyone who has done similar refitting.

Thanks in advance for your help.