This is the O.S. Max .46AX ABL BB Model Airplane Engine with Muffler. Ideally suited to a variety of R/C aircraft including trainer, sports aerobatic, and scale types. FEATURES: Redesigned remote needle holder is separate bracket, not part of backplate Advanced Bi-Metallic Liner. This process uses a double layer of plating material rather than one thick layer. This helps the metal to bond to the cylinder and is more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve for better compression, longer life. Side exhaust Newly designed sport muffler with squared-off shape 40G carburetor Ball bearing-supported crankshaft Two-year limited warranty INCLUDES: One O.S. Max .46AX ABL BB model airplane engine with muffler, A3 glow plug, 2-1/4" (57mm) section of tubing for remote needle, two 3mm x 35mm cap head muffler screws, warranty sheet, decal sheet, and illustrated instruction manual REQUIRES: Fuel containing 5%-20% nitromethane with at least 16% lubricant SPECS: Displacement: 0.455 cu in (7.45cc) Bore: 0.866" (22mm) Stroke: 0.772" (19.6mm) Practical RPM: 2000-17000 Power Output: 1.65ps/16000 RPM Weight: 13.2oz (375g) without muffler Weight: 17.2oz (489g) with muffler Recommended Propellers: 10.5x6, 11x6-8, 12x6-7, use 10x6 for break-in Crankshaft Size: 1/4-28 Distance from remote needle to end of crankshaft: 4.7" (119.4mm) Distance from center of engine to drive hub: 2.4" (60.4mm) Distance from center of engine to end of crankshaft: 3.4" (87.6mm) Distance/crankshaft center to muffler exhaust outlet: 3.9" (100.5mm) Height from crankcase bottom to top of cylinder head: 3.3" (85.2mm) Height/crankshaft center to top of cylinder head: 2.6" (67.4mm) Width including mounting ears: 2" (51mm) Width not including mounting ears: 1.4" (35mm) Width between mounting holes same side: 0.69" (17.5mm) Width between mounting holes opposite side: 1.7" (44mm) Diameter of muffler body: 1.5" (38.1mm) Angle of muffler in relation to engine: 4° NEEDLE SETTINGS: High Speed Needle: 1½ to 2 turns out from closed position, per page 18 of manual Low Speed Needle (aka: Mixture Control Valve): Close the throttle rotor gradually from the fully opened position until it is just fully closed. (Do not turn further.) Then screw in the Mixture Control Screw until it stops. Now unscrew the Mixture Control Screw approx. 3/4 turn. This is the basic position, per page 23 of manual
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