Re: Material List
ACX exterior grade plywood
MDO (medium density overlay, NOT MDF, the carp knockdown furniture is made of)
Auracu
Marine Plywood
Can all be used for transoms, stringers, deck & any seat/storage boxes you need to redo. Some can't easily get marine plywood (which is the most expensive) or find the Auraco locally. I used ACX & MDO to make my Duracraft's transom.
Depending on the layout & construction of your boat, 1/2", 5/8" or 3/4" thick ply for the deck. Using something other then the thickness of plywood Starcraft used originally, may cause fitment problems w/ the consoles & windshield. Slight changes, like using 5/8" instead of 1/2" won't be nearly as problematic as using 3/4" instead of 1/2". Sometimes it won't make any difference, depends on how your boat was built.
Since it's an I/O motor, you'll probably need 2 pieces of 3/4" to make the actual transom plywood blank, then 3/8"+/- ply to make the 'horse collar' plywood ring that fits just at the keyhole to make the total lamination (including the fiberglass inner & outer skins) 2-2.25" thick thru the keyhole.