OS FSAlpha 81 Four Stroke engine includes OS mount 71905030 - NEW BOXED

OS FSAlpha 81 Four Stroke engine includes OS mount 71905030 - NEW BOXED

The FS?-81 was the second engine in the new generation of 4-stroke Fs?Series engines. Since the major dimensions are the same, including the mounting dimensions, the new FS?-81 can easily replace an existing FS-70SII with little reworking. With an increase in power due to the displacement increase in conjunction with light weight, scale type aircraft can realize more scale like flight and sport models an increase in performance. The distinctive shape of the engine and silencer symbolize this new generation of 4-stroke FS? Series engines

?A bold new design and sharp cooling fins are unique to the FS? Series. The silencer can be adjusted both in and out as well as rotated to match individual cowling requirements. Internal parts employ the latest available materials and are machined with the latest technology. Models designed to be powered by 2-stroke .40-.60 size engines would be suitable for the FS?-81 engine. Ample power is available for those heavier, scale type models.