The standard in sport engine technology, in a unique streamlined design

* More cooling fin area extends the life of the engine, and virtually eliminates engine seizures in the air
* Added "webbing" on the crankcase strengthens high-stress areas to help ensure that they stand up to the rigors of learning to fly
* Overall tighter needle valve fit utilizes an "O" ring to help maintain the performance levels you need
* A fuel inlet that points up allows for easier fuel line access for fueling and defueling
* 15, 40 & 46LA are also available in natural gray color (OSMG0016, OSMG0041, OSMG0047)
* All, except OSMG0040, include a glow plug

SPECS:
Construction: Aluminum 1-Piece Crankcase, Piston, Cylinder Head, Crankshaft, Connecting Rod, and Crankshaft. Nickel-Plated Brass Cylinder
Displacement: 2.49cc (0.1517 cu. in.)
Bore: 15.2mm (.598")
Stroke: 13.7mm (.539")
Horsepower: .41 BHP at 17,000 RPM
Weight: 5 oz w/o muffler (6.5 oz w/muffler)
Length: 56.5mm (2.16") distance/backplate to front of drive washer 76.5mm (3.01") distance from backplate to prop adapter
Width: 24.8mm (1.0") width of engine neglecting mounting flanges.
Distance Between Mounting Holes Same Side: 14.4mm (.56")
Distance Between Mounting Holes Opposite Side: 33mm (1.29")
Height: 61mm (2.42")from bottom of mounting tab/top of cylinder head
Crankshaft Thread Size: 5mm
Recommended Props: Break In: 8X4
Trainer and Sport Models: 7X5-6, 8X4-5
Practical RPM Range: 2,500 - 18,000 RPM