Re: Anyone seen something like this before?

[Anonymous]

No doubt that its a radial engine, and two-stroke, there’s no mechanical valves visible anywhere on the exterior, and the cylinder castings can’t possibly be hiding any. Could be rotary valve induction, but you’d have to get it apart to find out, but to me, the inner crankcase would have to be a very complex design in order to accommodate a rotary valve, would it not?

In my tiny little mind, it looks like an air-cooled engine with an added-on water cooling system. The barrels around the upper part of the cylinders are obviously meant to serve as water jackets, you can see evidence of weld beads around the circumference of the barrels. They have water being fed in via an external manifolding system. I would bet that the cooling water exits the water jacket and flows into the exhaust manifold to be dumped out with the exhaust gases.

Note the bolt pattern on the top of the jet pump unit. Look familiar? Probably mates up to a stock tower, manufacturer unknown. Might belong to this powerhead, might not. Need to find the guy that built it to find out for sure.

Interesting piece, at any rate.

Hope this helps.

Best,
T2