I am selling this OS FS-120 Surpass II pumped four stroke engine. I got it in a trade deal with the intentions of using it in a Ryan STA, but have changed my mind and decided to go with a non pumped engine. The extra reliability and power are not necessary for my style of flying. I prefer the simpler plumbing etc. of a standard engine.
This engine has great compression and turns over very smoothly. I was told by the fella I got it from that it only had 3 tanks of fuel through it on the bench. Being the skeptic I am, I removed the valve cover to see how clean it was and check the valve clearance. Sure enough, she was spotless inside, and the valves were right on.
Slightly more powerful than the standard 1.20, she is rated at 2.1bhp@12,000 RPM.
Comes complete with original box, manual, all tools including valve adjusting kit, muffler, choke rod, and an extra needle valve which is supplied for finer mixture adjustment.