O.S. 140RX 19221 Ringed w/Pump OSMG0678

O.S. 140RX Ringed w/Pump OSMG0678

It conforms to the new rules for powerplants.

Features

• O.S. 140RX Ringed w/Pump OSMG0678

• Rear-mounted needle valve (attached to a bracket on the backplate)

• 2-needle pump carb

• Integrated fuel pump (for continuous fuel flow during aerobatics)

• One-piece crankcase

• Designed to get the max power at low RPM (makes the engine quieter)

• Extra cooling fins (helps dissipate heat)

• Ringed piston

• Rear exhaust

• Twin ball bearing-supported crankshaft

Specifications

• Displacement: 1.40 cu. in.

• Bore: 1.26" (32mm)

• Stroke: 1.13" (28.6mm)

• Practical RPM Range: 1,800 - 10,000

• Max Power: 3.5 BHP at 9,000 RPM

• Weight (WITHOUT ANY EXHAUST): 29.3oz (840g)

• Suggested Prop Sizes: 15x14, 16x14

• Overall height: 4.65" (118mm)

• Overall length (backplate to front of drive washer): 4.6" (117mm)

• Overall width: 2.76" (70mm)

• Width of crankcase only (for engine mount): 1.91" (48.4")(this is the same mounting dimensions as the 1.20 Surpass II with pump.)

• Crankshaft thread size: 5/16-24

Package Contents

• One set of instructions, O.S. poster, and decal

• One #A5 Glow Plug (OSMG2693) Heavy Duty Drive Washer

• One prop nut w/locknut and spinner mount

• One additional needle (with less taper)

• One Heavy duty drive washer

Requirements

• Header (exhaust adapter) for a tuned pipe (OSMG2727)

• Tuned pipe (tuned silencer - OSMG2945)

• 2-stroke fuel