OS Motors .75AX ABL 61A Carb E4040 Muffler

This is the O.S. Max 75 AX ABL Airplane Engine with Muffler.

FEATURES:
Very same mounting dimensions as the O.S. Max .61FX
Advanced Bi-Metallic Liner process uses a double layer of plating
    material rather than one thick layer. This helps the metal bond to
    the cylinder and makes the plating more long lasting. Also, the plating
    process is more consistent, resulting in a more precise fit between
    piston and sleeve for better compression and longer life.
Power Box muffler style offers more volume for increased power in
    an extremely compact shape
Angular head style uses increased surface area for better cooling
Ball bearing-supported crankshaft
61A carburetor with diagonally placed needle valve getting rid of
    remote needle valve placement
2 year limited service warranty

CONSISTS OF:
O.S. Max 75 AX ABL Airplane Engine with E3010 muffler, carburetor,
    #8 glow plug, illustrated instruction manual

NEEDS:
Airplane blend fuel consisting of 5%-20% Nitromethane with at least 18%
    lubricant

SPECIFICATIONS:
Displacement: 0.75 cu in (12.3cc)
Bore: 1.02" (25.8mm)
Stroke: 0.93" (23.5mm)
Practical RPM: 2,000-16,000 RPM
Power Output: 2.4 PS, 2.37HP/15,000 RPM
Weight: 20.39 onuces (578g) w/o muffler
26.46 ounces (750g) w/ muffler
Recommended Props: 14x6, 14x8, 15x7
Crankshaft thread size: 5/16-24
Distance from center of engine to drive hub: 2.62" (66.6mm)
Distance between exhaust bolt mounting holes 42mm
Height from crankcase bottom to top of cylinder head: 4.07" (103.5mm)
Height/crankshaft center to top of cylinder head: 3.20" (81.5mm)
Width including mounting tabs: 2.4" (61mm)
Width not including mounting tabs: 1.67" (42.6mm)
Width between mounting holes very same side: .98 (25mm)
Width between mounting holes opposite side: 2.04" (52mm)
Diameter of muffler body: 1.92" (48.8mm)
Angle of muffler in relation to engine: 4°
Length from end of crankshaft to back of crankcase 5.09" (129.5mm)

High Speed Needle: 1.5 - 2 turns out from completely closed
Low Speed Needle: 2mm space between the needle and spray bar at complete
throttle (looking down the neck of the carb)