O.S. 91HZ-R Ringed Helicopter Engine

SPECIFICATIONS
Stock Number: OSMG1973
Displacement: 14.95 cc (0.912 ci)
Bore: 1.091 in (27.7 mm)
Stroke: 0.976 in (24.8 mm)
Practical rpm: 2,000-16,000
Power Output: 3.4 hp @ 15,000 rpm
Weight: 22.05 oz (625 g)
Includes: 61ER Carburetor, #8 Glow Plug, Check Valve, 0.2mm Head Shim (Engine has a 0.1mm head shim installed), (2) 2.6X5 Needle Adjusting Screws