I just redid the motor mount on 376. Last time I did it was when I was 18! This time, I ground off all the laminate on the fore side of the mount to expose verrrry rottten and waterlogged wood. I chisled it all out as best I could. Then I inserted a new piece of plywood. Oh yea, I also drilled out the old drain tube. Next, I fiberglassed over the exit for the tube, then filled the whole works with a lot of epoxy from back up in the laz. Last step was to redrill a hole for a larger drain hole (OEM was too small in my opinion--- clogged up from time to time), insert a new piece of PVC, then epoxied it in. Eureka! Solid as a rock, and should be 25 years before I have to do it a third time!