Also, picked up two sheets 3/4 in Coosa, 5 gal of poly resin, mek, bubble buster roller, roll of Matt, and got a roll of something heavier than 1708.  The heavier stuff was a "good deal". We'll see. At any rate, going to patch holes in outer skin of transom first.  Question, I know it's 11ccs of me for a quart of poly resin at 70 degrees Fahrenheit, less if hotter.  How much less, say at 75, 80, 85 degrees. It's getting hot here 8n tn. Thanks.

Roger that on the 16-17 foot mold.  I think the answer must be really obvious and you are not wanting to insult my intelligence or lack thereof, but why rebuild stringers from the Inside. Are inside out rebuilds stronger or something. The answer could be my proposal, if executed, will look stupid which is legit.  Just curious. If I need to stop asking, I can do that too.  Thank you for all the info, truly a great resource.

Yeah we've seen iron bars glassed in for ballast and to correct lean, in one boat, so nothing really surprises us.
If you can build the molds that you see in the pics I posted, you can make the stringers. I joined multiple sections of the stringers together to make the length I needed - that was challenging. If I did it again I would make a 16-17ft mold.

I have a newer Suzuki...does anyone know if the paints used on the lower unit would make the aluminum "non-conductive"? 
My lower unit is about 1-2" submerged in the water while resting on the tilt-bracket....my concern is electrolysis (the annode is not submerged).

Does the motor really need to rest on the tilt bracket or does it do harm to the hydraulic tilt system if it does not rest on the bracket?   

Ouch, can you see the damage from the outside? I think it's an easy repair but will require some grinding (ugh) The other option for the stringers is to rip them out and build new ones, then you know they'll last. I did that in my 170 rebuild. You only need fiberglass cloth, 1708, resin and a homemade mold.

Heres a few pics from my rebuild:
Stringers out, hull inside ground and new 1708 over entire hull


New stringers


Stringers scribed to hull and set in place




Held in place


27 gal fuel tank notched in with room for expansion


Tabbed in and later tacked in place


This is the tank I bought at Marine Surplus in Bradenton FL. They have a web page


This will get you in the middle of the stringer stuff
https://classicaquasport.com/smf/index.php?topic=10101.msg103523#msg103523