How do I patch composite/plastic motor pan??

[Instigator]

Lower pan on my V-6 OMC is a plastic/composite that smells like fiberglass when I grind it.
It has a crack on one side that goes top to bottom and I want to repair it before I paint it.
How should I do this so it does'nt come back??
Thinking I should "V" out the crack on the inside and fill it with Marine Tex and laminate another piece on top of it.
Am I close??
Thanx guys!

[us1]

If its plastic, like the Merc ones, it can be repaired at Born Again Fairings in San Dimas 909 592-7638. I sounds like it isn’t pure plastic so I’m not sure if they fix it.

[Instigator]

See you figured out how to do the large Merc logo.:):)
Have'nt figured out what to put for mine yet??

[Techno]

If ist' glass you should see some kind of patterning if you sand it a little. The crack should also look like a glass composite.

If it is glass, Vee it out and lay increasing widths of glass in the Vee. You want the crack to be glass again. eventually you'll have a layer or so across the broken area.

I read this from West epoxy info. For plastic heat it just before it would melt. ( you want to slighty burn not melt it) This does something to the plastic. Scuff it then bond it with epoxy as if it was glass.

[ModVPinND]

Had the same problem with the damaged pan for my Evinrude. I got out the dremel, did a little grinding and scuffing and then used some POR-15 "epoxy". Three boating seasons later and everything is still holding up. See ya later.

[Raceman]

Some of the earliest plastic cowls had the really fine fiberglass cloth on the inside seam. I assume this was done with epoxy instead of polyester resin. I've scuffed and repaired several this way over the years. I've never tried Techno's heat idea, but I like it.