Glassing engine mounts with poly resin

[F14CRAZY]

I'm helping my best buddy with his Wellcraft Nova 210XL. In the process of swapping his 302 for the proper 351 he found the engine mount lumber to be wet. I've got them cut out and I'm grinding the rest right now (actually in my tyvek suit at the moment). The transom, bulkhead ahead of the mounts, deck and stringers check out to be solid.

It's obvious someone replaced these before and just didnt seal the lag bolt holes properly into the mounts. Each they're two 2x6s attached together about 37 inches long. I have some dry PT 2x6s with me, some 18 oz roving as I used in my Capri restoration, and a gallon of premium poly resin from US Composites that I used in fixing some gelcoat scrapes on his parents Capri.

Being that I've only laid up glass with epoxy, do I need to use a layer of CSM or something over the wood first before the roving? Was there any other thing thats different between laying with poly versus epoxy? thanks guys

 

[F14CRAZY]

Re: Glassing engine mounts with poly resin

Aw crap...I just realized that the engine mounts were last replaced with what seemed to be 2-3 layers of maybe 6-8oz roving. It seems quite possible that they used epoxy instead of poly, and from what I know poly what bond to any remaining epoxy...

Guess I should just see what epoxy I have left and used that. I'd avoid having to use CSM

 

[F14CRAZY]

Re: Glassing engine mounts with poly resin

Well at any rate I picked up some CSM from home depot and will do some more grinding soon...there's too much frozen water sitting in the bottom of the bilge and in those little voids where the old "new" glass job wasn't good. Gonna wait till it warms up a little since putting a space heater in the bilge with a tarp over the hull wouldn't melt it. And don't know how it would set up at or below freezing