OS Motors .75AX ABL 61A Carb E4040 Muffler

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

FEATURES:
Same mounting dimensions as the O.S. Max .61FX
Advanced Bi-Metallic Liner procedure utilizes a double layer of plating
    material rather than one thick layer. This helps the metal bond to
    the cylinder and makes the plating more durable. Also, the plating
    procedure is more constant, resulting in a more accurate fit between
    piston and sleeve for better compression and longer life.
Power Box muffler style supplies more volume for increased power in
    an extremely compact shape
Angular head style provides increased surface area for better cooling
Ball bearing-supported crankshaft
61A carburetor with diagonally positioned needle valve removing
    remote needle valve positioning
Two year minimal warranty

INCLUDES:
O.S. Max 75 AX ABL Aircraft Engine with E3010 muffler, carburetor,
    #8 radiance plug, showed instruction manual

NEEDS:
Aircraft mix fuel consisting of 5%-20% Nitromethane with at least 18%
    lubricant

SPECS:
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
Advised Props: 14x6, 14x8, 15x7
Crankshaft thread size: 5/16-24
Distance from center of engine to drive center: 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 consisting of mounting tabs: 2.4" (61mm)
Width not consisting of mounting tabs: 1.67" (42.6mm)
Width between mounting holes same side: .98 (25mm)
Width between mounting holes opposite side: 2.04" (52mm)
Size 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 ends up from completely closed
Low Speed Needle: 2mm space between the needle and spray bar at complete
throttle (looking down the neck of the carb)