Paul,
 Wondering if you or any other members might be privy to
 current manufacture of rotary chainsaws or weed trimmers?
  It's been done before and I seem to recall something from this list
 or my other internet wanderings of an engine manufacturer
touting better emissions from rotary vs 2-cycle...

Michael
KMS 4

The legendary KMS 4 from 1975 DOLMAR produced together with Fichtel &
Sachs the first chain saw with rotary engine.

--
Michael S. Francisco

I suspect current chain saw records are held by 50 HP go kart engines
from AIXRO. Al least the ones a single man can pick up and use :)
Not counting small block Chevy V8 powered chainsaws.

Paul Lamar

Those must be the "Tim the Tool Man" chain saws.

Dale Davies