1971 Aquasonics Aqua-Jet w/Trailer - BaT - Grand Island, NY

[SoCal250]

(not mine)
Never seen one of these, but I guess that shouldn't be a surprise since they only made a few of them.

1971 Aquasonics Aqua-Jet w/Trailer
https://bringatrailer.com/listing/1971-aquasonic-aqua-jet/
Powered by a Curtiss-Wright 339cc two-stroke twin paired with a Berkeley jet drive.

[m in sc]

Im not a watercraft guy but thats fucking awesome. 

[IR8D8R]

That is super-cool and I'm not into watercraft either.
 Somehow, despite making aircraft and aero engines for decades, Curtiss-Wright managed to make this powerplant look thoroughly agricultural.
 Apparently this engine was used in a John Deere SN-71 model 400 snowmobile. Described as a Canadian Curtis-Wright 339cc producing 28 hp. There was also a model 500 snow machine with a 436cc version making 36 hp. That is the only other reference I could find online. No photos of the engine itself.

IR8D8R

[STLMike]

That's interesting but the fact you're in a prone position while riding gives me thoughts of hitting a wake and knocking the wind out of yourself.
I'd rather play with lawn darts.