Don't forget to epoxy (thoroughly) any holes drilled or cut into your ply/FG sandwich to prevent water intrusion and infiltration of rot spores. This applies as well to anyplace a fastener penetrates the glass.
Failure to do so will, over time,turn the plywood into mush or powder leaving you with very little structural integrity. Good examples of this type of failure were glass covered stringers of a number of quality production motoryachts of the late 70's that had to be replaced at great expense to the owners. In many cases, the only thing that held the engines in place was their weight bearing on the stringers. The wood that it was lagged to had long since gone and the only thing preventing lateral movement were the remains of the lag bolts protruding into the glass. Scary. Good luck.
Thanks for the replies on my ME-3001 post yesterday.
Another question:
How suitable is glassed in ply for mounting a motor and thrust bearing? And what thickness ply?
There are a few group photos of installs using ply, and I found this site where everything is mounted on glassed ply:
http://1698943.sites.myregisteredsite.com/id14.html
My current thinking is to make a ply mounting 'board' from two 3/4" pieces of ply, epoxied together, then encapsulated in several layers of glass cloth and mat. The 'board' would then be mounted inside the engine compartment using 1/4" marine SS right angles.
The board would have a cutout for the motor. The motor would be bolted to an etek motor mount, the mount would then be bolted to the board. The thrust bearing would also be bolted to the board. This arrangement would give plenty of clearance beyond the board for the pulleys and belt.
Any suggestions from you guys who've done something similar?
--Tim.
--
George Johnson
GeoMar Logistics
Jomtien, Chonburi
Thailand
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