O.S. 91FX .91 Glow Engine w/Muffler . Write the first review. View All (6) Part#: OSM19021. O.S. O.S. 2-Stroke Glow Engines Engines/Fuel Airplanes. Price: $379.99:. Overview; This is the OS Engines 91FX .61 ring glow engine, with 60f carburetor and included OS E4020 Muffler. Designed for sport, but engineered for excellence, the 91FX offers.. NEW VINTAGE OS FS-91 SURPASS 4-stroke R/C GLOW MODEL AIRPLANE ENGINE wBOX. Opens in a new window or tab. Brand New. $299.00. Buy It Now +$12.52 delivery. Sponsored. OS Engine - OS Surpass FS 91S II - OS FS 91 S - NeW! Opens in a new window or tab. Brand New. $399.99. or Best Offer +$14.99 delivery.
The FS-91 II also features a new rear-mounted, updraft 60P Carb, Intake Manifold, and Coverplate and a helix gear-driven camshaft supported by ball bearings, ringed piston. Does Not use choke valve, but instead an electric starter to start. Grease-packed twin-sealed corrosion-resistant rear ball bearing... O.S. Intake Manifold Assembly: FS-91 Surpass II . More Related Items. O.S. Rear Bearing: 50SX-H, 55HZ, 55AX [OSM25830010] O.S. Engines High Pressure Check Valve [OSM72403070] O.S. Engines Piston [OSM29073200] O.S. Engines Piston Pin Retainer Clips (2) [OSM25217000] O.S. Engines Front Bearing (.40-2.40) [OSM26731002].