Has any one had the lag screws strip out, due to vibration and age, on a Catalina 30, that hold the engine mounts and if so, how did you fix it. There are 2 that hold each mount and I have 1 that won't tighten. thanks Roy
Engine Mount Lag Screws
- Thread starter Roy20596
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How to fix
Make a template(generally I draw a cross over the existing hole extending out past where the new hole will be drilled) for where the hole is located, drill it out oversize, fill with thickened epoxy and redrill. You will probably need to lift the engine off the mount with a come along and a 4x4 across the companionway and use a right angle drill. Tim R.
Make a template(generally I draw a cross over the existing hole extending out past where the new hole will be drilled) for where the hole is located, drill it out oversize, fill with thickened epoxy and redrill. You will probably need to lift the engine off the mount with a come along and a 4x4 across the companionway and use a right angle drill. Tim R.
When
I replaced my mounts on my old boat, 3 of the lag screws broke just under the head. I used a hole saw and drilled them out. Then I cut with the same hole saw, plugs to fill the holes....used oak. Put epoxy in the hole then a plug, epoxy, then plug until it was filled. Then redrill and rethread. I would change all the lag bolts as you work on them as the ones I did get out (1977 vintage) were a mess. Good Luck Greg
I replaced my mounts on my old boat, 3 of the lag screws broke just under the head. I used a hole saw and drilled them out. Then I cut with the same hole saw, plugs to fill the holes....used oak. Put epoxy in the hole then a plug, epoxy, then plug until it was filled. Then redrill and rethread. I would change all the lag bolts as you work on them as the ones I did get out (1977 vintage) were a mess. Good Luck Greg
If you are of a mind to plug the hole(s) with
wood a one inch hole saw will cut a one inch hole and a 1 1/8 hole saw will cut a tight plug for the hole. Since hole saws use a pilot drill you will have to be careful when you cut your holes so that the lag bolts land in the right places.
wood a one inch hole saw will cut a one inch hole and a 1 1/8 hole saw will cut a tight plug for the hole. Since hole saws use a pilot drill you will have to be careful when you cut your holes so that the lag bolts land in the right places.
quick fix
I removed the bolt, filled the hole with epoxy and reinserted the bolt and let it harden up. Worked so far for 5 years.
I removed the bolt, filled the hole with epoxy and reinserted the bolt and let it harden up. Worked so far for 5 years.
pilot hole
When I did mine, I cut and stacked several peices of wood, then put them in a vise. I used the pilot on the first peice and then removed it and drilled the rest of the plugs using the top peice as a template so no hole would be in the other pieces. Sacrificed on peice..........
When I did mine, I cut and stacked several peices of wood, then put them in a vise. I used the pilot on the first peice and then removed it and drilled the rest of the plugs using the top peice as a template so no hole would be in the other pieces. Sacrificed on peice..........
Epoxy ...
Did this for my 87 Legend 35 this spring ... I wanted to avoid moving the engine around, so I removed the offending bolts, injected epoxy into the holes with a syringe, ensuring that everything was coated (poking around the hole with a Q-tip). I then reinserted the bolts, and left them in place until the epoxy has just set firmly, and then I removed the bolts to let the epoxy cure properly. Epoxying the bolts fully in place is a recipe for permanent bolts!!! This is not as good a solution as moving the engine, and filling the holes with epoxy/filler and then redrilling, but I believe that it will suffice and I would expect it should last for years. Chris
Did this for my 87 Legend 35 this spring ... I wanted to avoid moving the engine around, so I removed the offending bolts, injected epoxy into the holes with a syringe, ensuring that everything was coated (poking around the hole with a Q-tip). I then reinserted the bolts, and left them in place until the epoxy has just set firmly, and then I removed the bolts to let the epoxy cure properly. Epoxying the bolts fully in place is a recipe for permanent bolts!!! This is not as good a solution as moving the engine, and filling the holes with epoxy/filler and then redrilling, but I believe that it will suffice and I would expect it should last for years. Chris
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