My last boat had a '79 Johnson 85hp V-4 on it. It sat in a field for 5yrs when i got it. I drained and cleaned the tank, replaced the primer bulb and line to the engine, mixed up a fairly rich mix, and it busted off and ran great, smoked like a tar kiln though. After the first tank of rich mix, I went to 50:1 with Evinrude oil and ran some seafoam through it to de-carb it. It continued to smoke, but that decreased as I ran through that tank. The motor ran fine for the next 8yrs for me, and has done fine for the last 2yrs with its new owner.
Point being, try running it before getting too warped out of shape about what it might or might not need. No doubt it might need some tlc, but it might surprise you and go right to work.
If you're not living on the edge, you're taking up too much space!