For Sale: OS Max .91FX ring engine w/muffler and manual.  One owner.  This engine has 13
flights on it and is in good condition.  Compression is good.  Very little signs of wear.  This sale
also includes a pitts style muffler.  I think it is a Bisson but can't remember has BCM
(Bisson Custom Muffler) stamped on it. It fits this engine, same usage as the motor. and a new OS
#8 glow plug.  Items will be shipped USPS.