On my boat I am able to lift the outboard off my dingy with small
tackle from the end of my boom. On small boat you might be able to
work something out with you main sheet -- eg. put a snap shackle on the
boat side and attach that to the engine for lifting. I think you will
be happier with a 2-stroke than a four. I spoken with a lot of folks
who have moved to four strokes and the reviews are mixed. The small
Honda four strokes seem to have the most loyal following, but even with
them I know some folks who have been very unhappy... You might try
rowing your new dink before you buy an engine though. I had a Zodiac
285 air floor and just a simple set of modifications to the row locks
and glued on rub strakes/keels on the bottom made it as rowable as many
small hard dingies.

-- Tom.