This is the O.S. Engines 110FS-a 4-Stroke Aircraft Engine / with 5040 Silencer. / / FEATURES: Muffler adjusts in or out with threaded header pipe and rotates a / full 360° for more mounting options with fewer modifications / Continuous lubrication system recirculates excess oil instead of / venting it for better performance and longer engine life / 60Y carburetor with longer venturi for leak-free seals, less fuel / blow back and optimal air/fuel mixing / Two year limited warranty / / INCLUDES: O.S. Engines 110FS-a 4-Stroke Engine, muffler, needle valve / extension cable, F glow plug and instruction manual / / REQUIRES: Fuel: 5-20% nitro content with at least 18% lubricant content / Propeller: Sport & Aerobatic 13 x 9-11, 14 x 8-10 / Scale 15 x 8, 16 x 8 / Electric starter and other field equipment / / SPECS: Displacement: 1.10cu in (18.0cc) / Bore: 1.20" (30.4mm) / Stroke: 0.98" (24.8mm) / Practical RPM: 2,000 - 11,000 / Power Output: 1.8 ps / 10,000 RPM / Weight: 19.2oz (600g) / Muffler Weight: 2.3oz (72g) / Crankshaft Size: 5/16-24 / Height from Mounting Tab/top of Cylinder Head: 4.1" (103.8mm) / Height from Crankcase Bottom/top of Cylinder Head: 4.9" (125.4mm) / Width at Mounting Tabs: 2.4" (61mm) / Width of Crankcase Below Mounting Tabs: 1.7" (42.6mm) / Length from Carb to Prop Washer: 4.5" (114.5mm) / Length from center of Crankcase to Prop Washer: 2.6" (66.5mm) / Length from center of Crankcase to center of Carb: 1.8" (46.3mm) / Needle Valve Setting: High Speed: 3-4 turns from closed / Mixture Control (low speed): Flush with carb / body, then 3/5 turn...