Re: 1964 Johnson Tri-Hull restore!
Re: 1964 Johnson Tri-Hull restore!
Thanks for the reference to my tri-hull thread, hope it helps.
I dry fitted my transom several million times and got it shaped before installing it. I decided beforehand what holes I wanted to keep and what holes I wanted to fill. I then clamped the core in place and drilled the holes I was going to use for clamping.
I then covered the bare transom with a single layer of CSM and resin. I coated the core with resin alone then let them both cure.
Layup and clamping of the transom core happened all at once. I decided to use two layers of CSM to bond the core to the skin. This gave me the correct thickness and the weave would hold the resin in place and not let it ooze out the bottom.
I got all my cut CSM, resin, roller, clamping bolts and everything else ready to go before laying the core in place.
I mixed my resin, rolled it on the bare transom and laid both sheets of CSM in place and wet them out thoroughly. I then smeared a thickened layer of resin (resin, cabosil, chopped fibers) on the core.
I quickly set the wood in place and pushed my well waxed clamping bolts through the holes and tightened everything up. It squished and oozed out everywhere. (DON'T forget to wax the bolts or they will not come back out)
I like the idea of drilling some relief holes to prevent air pockets. I also like the idea of having the assembly built with tabs in place, then glue it in.
BTW- I would use plain old ACX ply or MDO plywood if I had it to do over. Having a heavier transom is nice as well, but rebuilding the splashwell was a big job. I your case it is moot because you have to do the splashwell work anyway. OH! and listen to these guys, they know there stuff. Let us know how it turns out.
