Boat Lag Screw Mount Stripped

M

mckaras

Petty Officer 2nd Class
Joined
Apr 21, 2020
Messages
138
Anyone have any pointers as to how to go about a proper repair on the fiberglassed in mounts for an inboard engine? Looks like the did a patch job before where the fiberglassed in mount cracked. I went to put another engine in and the lag bolts on one side are good and on the other side one of them strips through...

Do they sell kits for a through bolt mount on either side? I have had a few cabin cruiser with through bolt mounting and was curious if there's something similar for my boat.
 
M

MikeSchinlaub

Petty Officer 1st Class
Joined
Jan 14, 2025
Messages
322
Sounds like the wood is rotten. The only fix is to cut out all of the rot and replace it. It's likely to snowball into most of the stringers and transom.
 
Scott Danforth

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,809
Make a couple of test drills. Most likely the motor mounts are rotten, the stringers they are sistered up to are probably rotten too. Also check the transom
 
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