I have a yamaha ox66 250 hp fuel injected long block that you can have for $300. I have a pair of these on my boat that will out perform any 4 stroke, theyre much lighter, hardly smoke, redline at about 5800rpm, dont fowl plugs...pretty much defunct all the negative 2 stroke myths. I run lots of boats and having everything else the same running a 2 stroke engine is like having twice the displacement as compared to the 4 strokes... acceleration is incredible with a big 2 stroke gobs of torque even at low rpm. The only thing a 4 stroke has over my 2 stroke is a smoother idle and a marginal increase in fuel economy, but this is partially offset by the weight savings you get with a 2 stroke. I even have one of those indestructable front toyota axles i can make you a package deal on. Pm me if youre interested.
Dave