Reenforcing the anchor drain stem is one of my spring projects when the boat is on hard for bottom job this coming spring. I was lucky with access from the inside of the hull two years ago with a few modifications as noted in the following posts. This repair done was less than perfect due to limited access. Working from outside hopefully will be a longer lasting repair.
My 1990 Ericson 32-3 has a 5" access hole to the forepeak (picture #1). Through this access, reaching behind the V shaped fiberglass structure (picture #2) I am able to touch the leaky drain tube but unable to work on it due to the awkward angle. Enlarging the access hole is one of the options...
ericsonyachts.org
I plan to pick a warm day when the adhesive or whatever you use can be injected through a syringe then thoroughly fill in the gap between the hull and stem. I may insert a rod into the stem coated with lubricant so the adhesive does not end up in the stem and the rod can be removed once the adhesive is cured.
My sailing area is the Pamlico Sound where the protected anchorages are known for sticky gooey muck. I accidentally poked through my repair this year trying to clear the clogged anchor drain. The screen placed at the bottom of the anchor well was ineffective, so thoroughly flushing the anchor rode and the anchor well over and over again is now the routine after a cruising trip.