Re: My First Obstacle
Lunch at the neighbors house that you should generally avoid
Find a post by oops & click through to his hull extension thread. The index on page 1 has lots of info & you can find the different mixes of PB & fillers for different purposes.
PB = peanut butter like consistency mix of polyester resin or epoxy and some compatible filler material that is added after the resins are 'kicked'
You'd mix glass or plastic balloons (micro-balloons) into the resins to make light weigh fillers for faring the hull for pre-paint/gelcoat
Cabosil makes a thicker heavier filler that is used for slightly larger nicks & dings in the hull pre-faring
Milled 1/4 fibers are added to make a still stronger filler that can be used in structural applications. Actual pieces of chopped CSM is used to make 'homemade' milled fibers. A combination of these fibers makes the PB appear to have hair mixed into it.... Hairy PB
Don't forget that the fillers that are added to poly resin are different then those for epoxy
If you don't mind the epoxy repair showing (gelcoat doesn't adhere to epoxy) it would be a stronger PB mix & adjacent to the keyhole & motor stresses it would be better.
It is more complicated then mixing PB hairy & stuffing it in the old bolt hole. W/out glass mat over both sides of the hole & tied into the existing glass, these 2 plugs will tend to crack, allow water to penetrate the transom &/or fall out over time. The glass mat then has to be absolutely below the surface of the existing gelcoat (outside) and fiberglass (inside) so that it can be faired flat & smooth. If not, you risk affecting how the outdrive attaches to the transom & if not correctly aligned it will affect the driveline &/or how the outdrive draws up tight to the hull & gasketting. And also allow water into the transom.
I'd suggest some time reading through some of the resto threads to help make it clearer how to make sure transom & motor mounts are solid before finishing a repower
