Hello all,
Here is my attempt to resolve the issue of water backing up against the bilge plug in the transom, which can result in rot of the wood in the transom. If the pics don't work, they can be seen at
http://www.hometown.aol.com/davideberbach/myhomepage/gwhiz2
After removing the old plug assembly, I measured and marked for a new hole into the transom. The new hole is wide enough to accomodate a length of PVC pipe that is wide enough to inset the new plug assembly.
After drilling and sanding, I inserted the pvc until it bumped up against the bilge. Marked and cut proper length of PVC.
Put silicon on the end of the pvc and inserted into the transom, filling additional silicon on the inside to complete the seal to the bilge. Also sealed the outside of the repair with silicon.
Inset new assembly, marked pilot holes, siliconed and screwed plug into place.
Additional note - Because I had significant rot of the wood in the lower transom, I glued solid vinyl pieces into the transom - left and right of the plug- in order to have something solid to screw the plug assembly into.