Engine Mount Block Construction

It'll be fine. That's pretty much all they ever are unless they use an aluminum mount that bolts through the stringer.
 
Concerning the original construction, keep in mind how it was built. It was built upside down - the entire cockpit liner is one piece. Meaning, that 1-1/2" of wood doesn't really "sit" on foam. The foam was blown in around the wood after construction. The fiberglass liner and "mount tower" would have been made first - then the wood would have been bonded to the underside of the tower. The strength of the tower doesn't come from the wood, per se. The strength of the tower comes from the vertical section of the tower. The wood will help to distribute the load to vertical section of the tower, but the primary purpose is give something for the motor mount lag bolts to bite into.

Back to what you did... is this correct? You've got wood in there for the lag screws to bite into and you "re-capped" the tower with fiberglass (do you mean "1708"?). You're good to go.
 
Thanks, yes meant 1708, fingers are ahead of brain! Trying to get things finished up before temperatures get too cold. Can never tell when winter will arrive here in NW Florida. I was going to use Rustoleum with a hardener in the bilge, do I have to gelcoat that new fiberglass or can I just put the Rustoleum right over it?
 
Ammo Dawg said:
Trying to get things finished up before temperatures get too cold.
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Ha! Nice joke!

6 layers of 1708? Yeah, that's MORE than enough!

If you just want to make the repair look mostly decent, yes paint will be fine. The epoxy, itself, is a complete repair and is 100% waterproof, though. Anything else you do is simply for aesthetics. Wipe it down with acetone and then use the Rustoleum that is labelled as "for plastics". I think it's just called "all surface", or something like that. If you want to make the repair look smoother, you could first sand it or fair it with either marine bondo or thickened epoxy. But again, that's all for looks.
 
frosh coach said:
Use bilge coat for paint. it holds up well.
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Yes. Rustoleum will do just fine - and is easy to reapply if needed - but gas/oil may deteriorate the paint (not the epoxy, though).

Dawg, google for "BilgKote".
 
The Rustoleum with the hardener gets good reviews for bilge coating. Never used it though. I've had good luck with the Jamestown Bilge coat
 
scoflaw said:
The Rustoleum with the hardener gets good reviews for bilge coating.
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Never seen that, myself. Will look into it.

Another option is to tint a small batch of epoxy and put another layer of epoxy over everything.
 
  • Decided to go with the rustoleum with the hardener, not perfect by any means but the color is uniform and let it harden a bit more than just about ready to put the engine in. My hats off to the guys who do fiberglass work, hard nasty work and I itched for several days. Well as least I have piece of mind that I have solid engine mounts now.
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Ammo Dawg said:
Thanks, yes meant 1708, fingers are ahead of brain! Trying to get things finished up before temperatures get too cold. Can never tell when winter will arrive here in NW Florida. I was going to use Rustoleum with a hardener in the bilge, do I have to gelcoat that new fiberglass or can I just put the Rustoleum right over it?
Click to expand...

That’s a joke right? I mean you’re not expecting snow right? :D
 
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