I had an Avon inflatable with a rotted transom and 8 yr old sons who could put it to good use. SO:
I cut the inside of the transom and the plywood core was so rotted I was able to remove a lot of it with the shop vac.
Very little chisel work and some grinding and more shop vac and it was cleaned out.
I used some scrap and a glue gun to make a template then transferred that to a solid sheet that was sectioned so I could slide it in to the open transom. Then I used plain old plywood because it was cheap and I was doing a small job poorly.
I did get fancy and set up a table to epoxy on with some poor man’s peel n ply (wax paper) to soak the plywood. I cut the new plywood core on a high angle to facilitate sliding it into the void and prevent having a seam where the drain plug hole would be drilled.
I painted everything with straight epoxy and then gooped the hell out of everything with cabosil and West System and jammed/clamped it all together. After it set up I ground the seams where the inner liner was cut and bridged it with West System and matt. More wax paper, thickened epoxy where screws would go and chopped mat over straight epoxy for the drain hole.
Cosmetically challenged, questionably executed but strong - there were no complaints on the test runs.
Now they just need to eat their Wheaties or make a friend to yank the pull start.
You can revoke my B31 card for a substandard performance but it was an old Avon and my boys don’t care!
