OS Motors .75AX ABL 61A Carb E4040 Muffler

This is the O.S. Max 75 AX ABL Aircraft 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 instead of one thick layer. This helps the metal bond to
    the cylinder and makes the plating more durable. Likewise, the plating
    process is more consistent, leading to a more accurate fit between
    piston and sleeve for better compression and longer life.
Power Box muffler design supplies more volume for increased power in
    a very compact shape
Angular head design offers increased area for better cooling
Ball bearing-supported crankshaft
61A carburetor with diagonally positioned needle valve getting rid of
    remote needle valve placement
Two year minimal warranty

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

NEEDS:
Aircraft blend fuel including 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
Suggested Props: 14x6, 14x8, 15x7
Crankshaft thread size: 5/16-24
Range from center of engine to own center: 2.62" (66.6mm)
Range 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 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 ends up from completely closed
Low Speed Needle: 2mm space between the needle and spray bar at full
throttle (looking down the neck of the carbohydrate)