below water line screw hole repair
 

What is the best recommanded product for filling small void screw holes in the transom below the water line.

Ive always use marine tex or 5200

epoxy!

drill out hole a little bigger to give room to inject epoxy and also remove any water logged core/glass

5200 is great stuff but its not water proof forever

i dont know how good it is but homedepot sells a marine epoxy self mixing kit, pretty small injetible type of deal, like a seringe. in the paint dept. i think its like 6 bucks. says marine epoxy on it.

Hey Shine, If i wanted to enlarge some holes to fill with epoxy & then tap them to accept machine screwes, how much bigger should the enlarged hole be for let's say a # 8 screw ?

with a plywood core double the diameter at a minimum, with a foam core, you might need high density insert, depends what kind of load you put on the fastener.

I have had good success with just drilling pilot holes into the epoxy plug. Pilot hole is a little smaller that a self tapping SS screw and using some 5200 or lifeseal to lock it in.

Which epoxy would you recommand ?

If you have other work to do like glassing or bottom coating, then just get a small kit of epoxy and a bag of filler. You mix the filler in with the epoxy to make a glue/putty, i would used wood flour for this, its thixotropic (non sagging), strong as heck, and not expensive.

If this is the only use you have then just get a small kit of pre-mixed putty

Shine, I have some G2 system three epoxy left that I bought for laminating the transom teak doors and some west system #403 microfibers & #404 high density filler that a friend gave me. Is the above epoxy ok & which of the two fillers do you suggest I use ?
Thanks for your help.