O.S. FSa-56 II with F-4040 Silencer L-OS34330
Latest version of this popular sized, high-performance four-stroke engine.
Features a black rocker cover to suit the appearance in scale models better plus a revised oil breather system. The breather now vents from the crankcase rather than being re-ingested in the inlet, to improve running consistency.
Specification
Weight: 394g (13.9ozs)
Capacity: 9.32cc (0.569cu.in)
Bore: 24mm (0.945")
Stroke: 20.6mm (0.811")
Power Output: 1.0PS @ 10,000RPM
Practical RPM: 2400 - 13000 RPM
