O.S. 25AX ABL 12670 21K E3080 OSMG0527

O.S. 25AX ABL 12670 21K E3080 OSMG0527

This is the O.S. .25AX ABL Model Airplane Engine with E-3080 Muffler. Ideally suited to a variety of R/C aircraft including trainer, sport types.

Features

• O.S. 25AX ABL 12670 21K E3080 OSMG0527

• Same mounting dimensions as previous O.S. .25 size engines

• Advanced Bi-Metallic Liner. This process uses a double layer of plating material rather than one thick layer. This helps the metal to bond to the cylinder and is more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve for better compression, longer life.

• Newly designed E-3080 Power Box muffler generates mild and pleasant sound and is constructed with an O-ring between the front rear body to prevent oil leaking and is fully positionable 

• 21L carburetor with needle valve angled toward rear of engine for safer adjustments

• Ball bearing-supported crankshaft

• Two-year limited warranty

Specifications

• Displacement: 0.248 cu in (4.07cc)

• Bore: 0.709" (18mm)

• Stroke: 0.630" (16.0mm)

• Practical RPM: 2,500-17,000

• Output: 0.8 ps @ 15,000 RPM

• Weight: 12.6oz (357g) with muffler

• Recommended Propellers: 9x5, 9x6, 9.5x5, 10x5

• Crankshaft Size: 1/4-28

• Distance from center of engine to drive hub: 2.1" (53mm)

• Distance from center of engine to end of crankshaft: 3.1" (77mm)

• Distance/crankshaft center to muffler exhaust outlet:

• Height from crankcase bottom to top of cylinder head:

• Height/mounting tab to top of cylinder head:

• Width including mounting tabs: 1.8" (45mm)

• Crankcase width below mounting tabs: 1.2" (30.6mm)

• Width between mounting holes same side: 0.59" (15mm)

• Width between mounting holes opposite side: 1.5" (38mm)

• Diameter of muffler body: 1.2" (32mm)

• Needle Settings: High Speed: 2 turns out from fully closed

• Low Speed: Flush with carb body then 1/2 turn in

Package Contents

• One O.S. .25AX ABL BB model airplane engine with muffler, #8 glow plug, two 3x28mm cap head muffler screws, needle valve extension cable, warranty sheet, decal sheet and illustrated instruction manual

Requirements

• Radio: 4 channel minimum

• Servos: 4 micro (digital servos recommended for best performance)

• 12" (305mm) Servo Extensions: Two for aileron servos

• 6" (152mm) Servo Extension: One for ESC

• 6" (152mm) Dual Servo Extension: One for aileron servos

• Motor: Brushless outrunner, Great Planes RimFire .32 (42-50-800) recommended

• ESC: 45A brushless if using recommended motor

• Propeller: 12x6E if using recommended motor

• Battery: 2100mAh 14.8V Lithium Polymer

• Charger: LiPo compatible with cell balancer or separate cell balancer if charger is not so equipped

• Building and field equipment

Comments

• N/A