OS Max OSM19218

This is the O.S. Max Two-Stroke 1.20AX Ringed Engine without Muffler. Model Application: Ideal for 3D, Precision and Sport flying Mounting Application: Mounts in same space as the .91FX (actual mounting dimensions vary slightly, see SPECS) Construction: Steel piston ring and liner, aluminum piston Carburetor: 70D with rearward angled needle valve for safety Glowplug: O.S. #8 supplied with engine, A5 (OSMG2693) will also work Warranty: Two-year limited O.S. Max Two-Stroke 1.20AX Ringed Engine with #8 glow plug, prop washer and nut, needle valve extension set, instruction manual and decal set Fuel: Two-Stroke with 20% lubricant and 5-20% nitromethane Muffler: E-5020 "Power Box" Propeller: 15x10-12 or 16x8-10 Field Equipment: Glow starter, fuel filter, fuel pump, fuel tubing Displacement: 1.218 cu in (19.96cc) Bore: 1.197" (30.4mm) Stroke: 1.083" (27.5mm) Crankshaft thread size: 5/16-24 Practical RPM: 1,800 - 9,500 RPM Power Output: 3.1ps/9000 RPM Weight: 22.82oz (647g) 7.074oz (219.2g) with 90° adapter installed 7.907oz (245g) with extension installed Distance Between Mounting Holes Same Side: 0.98" (25mm) Distance Between Mounting Holes Opposite Side: 2.3" (58mm) Distance Center of Crankcase to End of Crankshaft: 4.3" (109.5mm) Distance Center of Crankcase to Drive Hub: 2.7" (69.8mm) Width Between Mounting Tabs: 2.6" (67mm) Width of Crankcase Below Mounting Tabs: 1.8" (46.5) Length from Backplate to End of Crankshaft: 5.5" (139.9mm) Length from Backplate to Drive Hub: 3.9" (100.2mm) Height/Bottom of Crankcase to Top of Cylinder Head: 4.3" (109.2mm) Height/Bottom of Mounting Tabs/Top of Cylinder Head: 3.4" (85.7mm) Needle Settings: High Speed: 2 - 2.5 turns out from fully closed Low Speed: 3/4 turn out from fully closed with the throttle fully closed For version with muffler, order OSMG0650. jxs 10/25/05 Updated JBM 12-20-05 Updated JBM 3-7-06 ir/jxs updt lmm 3/31/09