[Codfish]

I know several have made this same modification to their 210CCs. I decided to check my water retention the other day and sure enough I had half full transom voids.

After looking at the job, and the work done by the factory, I decided it could be done better. I was very disappointed in the black sticky sealant used by the factory. I am sure it was easy to work with but it just doesn't cut it for the long haul. I was also disappointed in the fit of the cover plates. They could be cut a tad larger so there is no channel around the edge to hold water.

I first removed the plates by taking the screws out. I had no foam inserts so had to pull them up with a paint can opener. I removed the water and cleaned the void area, then scraped the black gasket material and trimmed the bumps around the screw holes so the surface would be clean and as flat as possible. I wiped the sealing surface of the transom and the plates with some acetone to remove the last of the black sealer.

I remembered that others had added more screws to the plate so I put four more holes around the edge (1 each side). I passed on the corners and hope that will not be a mistake.

Next I looked at the gasketing problem. I was not happy with the old black stuff so ignored that possibility. I then decided to make an inner and an outer gasket or dam with a bead of elastomeric. I ran the two beads around the perimeter of the plates and let them set overnight to skin over and partially harden. Of course I installed the deck plates first. Mine took #8 flat head phillips SS screws 1/2" in length to fasten the plate ring. My plates came from Cabela's, 4" grey to match the transom color. I sealed the plate rings with elastomeric of course.

On day two I found the gasket beads of elasto to be firm but still plyable. I then filled the area between the two beads with a thick bead of fresh elastomeric and let that skin over for about 15 minutes. Then the plates were reinstalled using the original screw holes and the four new ones per plate. The attached photos show the related detail to go with the narrative.

Hope this helps anyone who has yet to do this mod. If you haven't, you will need to some day, guaranteed.

codfish