We have the Nissan 3.5 2 stroke - very reliable and dependable so far(3 seasons), easy to lift up and down onto the dinghy.
I like the neutral gear on this motor. Still have to spin it around to back up, but being able to idle in neutral is a big advantage IMO. The dinghy won't plane, of course, but it's just a beach barge after all.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)