This is the O.S. Max 95 AX ABL Aircraft Engine with Muffler. FEATURES: Same mounting dimensions as the O.S. Max .75FX Power Box muffler design provides more volume for increased power in a very compact shape Angular head design offers increased surface area for better cooling Ball bearing-supported crankshaft 61C carburetor with diagonally placed needle valve eliminating remote needle valve placement Two year limited warranty INCLUDES: O.S. Max 95 AX ABL Aircraft Engine with E4040 muffler, carburetor, #8 glow plug, needle valve extension illustrated instruction manual REQUIRES: Aircraft blend fuel containing 5%-20% Nitromethane with at least 18% lubricant Propeller: 14x8, 15x6-8, 16x6-8 Glow starter and field equipment SPECS: Displacement: 0.949 cu in (15.55cc) Bore: 1.091" (27.7mm) Stroke: 1.016" (25.8mm) Practical RPM: 2,000-16,000 RPM Power Output: 2.9 PS, 2.86 HP/15,000 RPM Weight: Engine, 20oz (567g) Muffler, 6.28oz (178g) Recommended Props: 14x8, 15x6-8, 16x6-8 Crankshaft thread size: 5/16-24 Distance from center of engine to drive hub: 2.6" (66.6mm) Height from crankcase bottom to top of cylinder head: 4" (102mm) Height/crankshaft center to top of cylinder head: 3.2" (81.3mm) Width including mounting tabs: 2.4" (61mm) Width below mounting tabs: 1.7" (42.6mm) Width between mounting holes same side: 0.98" (25mm) Width between mounting holes opposite side: 2" (52mm) Diameter of muffler body: 1.8" (45mm) Distance from Center of Engine to Exhaust Outlet: 4.4" (112mm) Angle of muffler in relation to engine: 4° High Speed Needle: 1.5 - 2 turns out from fully closed Low Speed Needle: 2mm gap between the needle and spray bar at full throttle (looking down the neck of the carb) jxs 6/23/09 ir/jxs