Fuel pump rupture will allow fuel to spill into the crankcase causing an undetermined amount of total 2 stroke mayhem and you might even need a outboard whisperer. Lol....take it apart, it easy. Remember, if you have spark...and good spark, compression...good compression then it has to be fuel...
Did you replace the impeller? A motor that's sits that long is bound to have cracked rubber.
Swap coils, ohm everything out and if it test ok, replace power pack.
Doesn't sound like it has the "Good" spark. Do a spark GAP test. 3/8 with a bluish crack. Gap testers are $15 at any auto parts store.
The ones you put on still need to be shrunk on both ends ...you missed a step. I have no problem with the bullet connectors. After melting those, if still wrap them in something.
Best to do what Racer says especially with the older ones. Much more likely water gets in than oil getting out the top.
What is your gas to oil ratio on that old girl?
Old school rubber connectors have never been a problem for me unless someone left them apart and corrosion occured. Glad you found the issue and fixed it. Have fun!
Everything above sounds sketchy and I don't quite understand you.
But, that being said, what particular parts weren't OEM? And we're they Sierra at least? Imported parts from the far east will give you problems. Evinrude gaskets last 70 years....Amazon? There done when you tighten the screw...
I see the tie bar or part of a tie bar in the picture so with this information I can only assume it's a cable system. Picture from farther away would confirm.