Is this an Outboard powered racecar??
 

Found this in my web travels. No info trying to get some from the OP. Anyone seen this before? with the Avons it would lend itself to be European



http://i962.photobucket.com/albums/a...pse011ac59.jpg

pic is not very clear but
sure looks like a mercury ob allunimum flywheel
and motor turned with exhaust going forward
long time ago land and sea made an expansion chamber exhaust plate for the 2.0-2.5 motors
I had 1 of my merc ob alcy drag motors on a drag sand trike many yrs ago
and had a bud do a scale plane with 1
2 strokes are very versatile as can mount in any direction

Cooling system would be hard to fabricate. You'd probably be better off going with a snowmobile engine. That is cool though! I remember seeing a big speedboat rigged with 6 Merc V-6 2-stroke powerheads a while back.

cooling system is simple,,,,
used a F1 bottom adaptor plate for ex tuner and that's where the water tube entered
so that's the inlet
outlet from the heads,,,,,,,,,
run electric pump or drive 1 off the flywheel
the merc v 6 used was the 2.5 litre and will turn up to 12,000rpm @ 325+ hp window on alcy when fully ported
then add 100+ nitrous to it would make good power with torque
trike held world record for many yrs
there was no smomobile motor that had that power from 3 cyls