go to a welding shop for a custom one that fits, they can galvanize
or as outlined cut a longer one and use the cold galvanizing rattle cans, will hold up pretty well
prefinished is a god sent for using the house while doing it.
Have you seen the jamb saws and the edge flooring nailers (dont need to top nail the edge rows)?
Nice attched is my 65 GTO, second photo is the nee to me engine just had built for it. Hopefully going in the car over the next couple months
edit engine photo is too large gotta resize it …
I had similar experince with my merc alpha gen 2 I changed them at 18 years as they were just stating to get real stiff. Never leaked. Use OEM bellows they last.
since I planned to keep the boat no sense getting the last year or two out of them. If these ones last 15 years it’s someone else...
Not enough water way way too little. Get a OEM water pump kit
this should be the correct parts breakdown for your lower https://www.marineengine.com/parts/mercruiser-sterndrive-parts/260-19781982/4898730-thru-6225576/gear-housing-assembly-complete
has a sample of fuel been taken and put in a clear jar to see if there is water or contamination?
Did this with my buddies boat this summer and it turned milky in about 5 min...
Yes I know you had spark , but when it wont run verify it again to determine why it went from running to not running.
yes dribble some down the carb to see if adding gas changes things.
Also as all dodge suggested look down carb bores when you shut it off to see if bowl is over flowing and...
Are you still using the same cap? is water getting in from above sunpad etc?
What lube are you using
Did yo check the from the bellhousing to the transom there is a 1/4" or so rubber hose. drive could be passing pressure test but getting mositure in that way. Is this contamination in the line...
I think when it doesnt restart take a spark gap tester see if you have spark if you do dribble some gas down the carb , if it restarts then you are missing gas. Just gotta figure out if its spark or fuel. Hard to tell form the keyboard but if yo have good spark and timing is right it should fire...
That is about what I was running my old Evinrudes on. Almost zero smoke and very clean plugs. Had a 1975 15 hp , and a 1973 9.5 hp kicker.
I looked it up again. It was in the 1980's that Evinrude labeled the 15 hp and possibly others for 100:1 for a short time and discovered they had issues...