• Same mounting dimensions as the O.S. Max .46 AX.:
• Advanced Bi-Metallic Liner process uses a double layer of platin material rather than one thick layer. This helps the metal bond t the cylinder and makes the plating more durable. Also, the platin process is more consistent, resulting in a more precise fit betwee piston and sleeve for better compression and longer life..:
• Power Box positionable muffler.:
• Angular head design offers increased surface area for better cooling.:
• 40J Carburetor with diagonally placed Needle Valve eliminating Remot Needle Valve placement.:
• Two year limited warranty.:

• Displacement: .545 cu in (8.93cc):
• Bore: .906 (23mm):
• Stroke: .846 (21.5mm):
• Practical RPM: 2,000-17,000:
• Power Output: 1.75 PS, 1.68 HP/16,000 RPM:
• Weight: 14.29oz (405g) w/o muffler:
• 18.52oz (525g) w/ muffler:
• Recommended Props: 12x7-8, 13x6-7:
• Crankshaft thread size:1/4-28:
• Distance/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 tabs: 2 (50.8mm):
• Width not including mounting tabs: 1.4 (35.6mm):
• Width between mounting holes same side: .69 (17.5mm):
• Width between mounting holes opposite side: 1.7 (43.2mm):
• Diameter of muffler body: 1.5 (38.1mm):
• Angle of muffler in relation to engine: 4°:

O.S. Max 55 AX ABL Aircraft Engine with E-3070 Muffler, 40J carburetor, #8 glow plug, illustrated instruction manual, 3.5 (90mm) long needle valve extension cable and two 3x35mm muffler screws

• High Speed Needle: 2 turns out from fully closed Low Speed Neelde: 3mm gap between the needle and spray bar at full throttle (looking down the neck of the carb):
• Available Pitts Mufflers include BISG4046..: