O.S. Engine 81FS-a 4-Stroke Pumped Engine  [OSMG0982]

Scale modelers have actually enthusiastically embraced FS-a machines simply because they practically eliminate oil mess while delivering exemplary energy. You will have the 81FS-a built with a gas pump for even more consistent performance.

Mounts easily in the same room as an FS-70II without any improvements
Fuel is delivered regularly towards the motor always, whatever the plane's mindset, to get more dependable performance.
Ideal for aerobatics alongside circumstances that demand high power.
Feature the innovative recirculation system that re-lubricates components rather of venting the oil out into the cowl.

SPECS

• Stock Number: OSMG0982
• Displacement: 0.809 ci (13.26 cc)
• Bore: 1.091 in (27.7 mm)
• Stroke: 0.866 in (22.0 mm)
• Practical RPM: 2,200-10,000 rpm
• Power production: 1.28 hp @ 10,000 rpm
• Engine Weight: 20.11 oz (570 g)
• Muffler Weight: 1.9 oz (54g)
• Includes: 61R carburetor, F-5030 muffler, PD-08 pump