I have a 2hp, 2 stroke
yamaha on my 8 foot fiberglass dinghy
. With a clean bottom I could do about 3 knots solo at 3/4 throttle. It was perfect for the mooring
field but not much else. On an 10 foot rib
with two people it would be about the same, I would guess. Very light, easy to start and I can lift
it off the dink and put it on our boat's stern rail with one hand. I love it.
Oh, it is also very noisy compared to a four stroke.