What to do with this?
 

I have this engine.

http://www.error691.com/meltdown/3/mot1.jpg

http://www.error691.com/meltdown/3/mot2.jpg
here shown with a 3.5 computer hard drive for scale.

It's a two-stroke, 2-hp pump. I don't have precise data on the displacement, but from the size I assume it's 50cc.
I've taken it apart, and will remove the water mover when I find a tool that can exert enough torque. The mover is presently seized, as rust has made its job and I haven't been able to take it off with common household tools and generous applications of wd40.

http://www.error691.com/meltdown/3/mot3.jpg

It had been unused for 10 years or so, and even before that it has seen maybe one hour of running.

Anyway, after a good cleaning of the carb (will require some repair as it's leaking lots of fuel out of its lower valve) and general oiling of the crankshaft and piston, I started it up and it ran, so I know it's all right.

I intend to remove the whole metal plate where the pump assembly was screwed, and possibly the pull-starter as well (which is removed in the pictures, but I screwed it back on because otherwise I had no means to turn it on).

I'm looking for something to do with it.
It's power is probably too low, and its weight too high, to be used on a plane, and I don't have the money to buy all the parts for the plane anyway.
I was thinking of getting some random junk, a soldering machine, a few servos and build myself a very primitive r/c kart.

Do you see any obvious faults in this?

Also, do you have any other idea about other uses for it?

Thanks :)