17750 O.S. MAX 61FX without Silencer

O.S. 61 FX

Displacement: 9.95cc (0.607 cu in)
RPM range: 2,000 - 17,000
Bore: 24.0mm (.866")
Stroke: 19.6mm (.772")
Horsepower: 1.90 BHP at 16,000 rpm
Weight: 19.4 oz, 23.6 oz w/mufflr
Length: 84mm (3.31") the distance from the backplate to drive washer
Width: 43.0mm (1.69") width of engine neglecting engine mounting flanges
52.0mm (2.05") distance between centers of the mounting holes
Height:100.5mm (3.956")
Exhaust port: 29.5mm x 9.0mm rect
Crankshaft Thread Size: 5/16" -24
43.8mm btwn exh mounting holes
Props: Tuned Pipe: 12x9, 12x10, 12x11
Sport: 12x6, 12x7, 12x8, 13x6, 13x7
Break-In: 11x7