This new OS 70 Ultimate 4-cycle engine comes equipped with the latest OS FS-70U diaphragm type fuel pump and matching Type 60U carburettor incorporating a built-in pressure regulator. The regulator will ensure that fuel/air mixture is maintained at a constant level through maneuvers, for consistent performance and reliable throttle response.

This engine also comes with a Type F-4020 baffled muffler to reduce engine noise level with substantially enlarged volume.

Displacement	11.45cc/0.698cu in
Bore	27.7mm/1.091 in
Stroke	19.0mm/0.748 in
Practical RPM	2,000-15,000 rpm
Output	1.2 ps/ 16 oz
Weight	527.3g / 18.06oz (with silencer F-4020)

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This new OS FL-70 4-cycle engine will give pilots the performance advantages of a 4-stroke engine - greater fuel economy, higher torque, lower noise and in addition to all that, it is easy to operate and maintain. the FL-70 is lighter in weight than previous OS 70 four stroke engines and comes at a lower cost.

Other features include a newly designed, easy-to-use 60W airbleed carburettor, first OS ringless piston/liner assembly, a new muffler pressure system and a lightweight compact F-4030 silencer.

Displacement	11.45cc/0.699cu in
Bore	27.7mm/1.09 in
Stroke	19.0mm/0.748 in
Practical RPM	2,300-12,000 rpm
Output	1.1 ps
Weight	467 g / 16.47oz