OS FS 155 ALPHA PUMP 4-takt Metanolmotor, 25,36ccm.

How do you get 200-size power from a 120-size engine? O.S. calls it the FS155-a. Since the FS155-a is a pumped 4-stroke, you’ll enjoy 2.6 hp at all times, regardless of tank position, attitude or fuel level. With its novel recirculation system, oil is re-circulated to lubricate working parts — reducing friction and wear as well as cowl cleanup. Includes the 70R regulating carb for superior throttle response and precise fuel metering.

Prop Range    16 x 8 - 17 x 12

Muffler Weight    95g

RPM Range    2,000 - 10,000 rpm

Displacement    1.548 cu in (25.36 cc)

Engine (Only) Weight    805g

Bore    1.32 in (33.6 mm)

Power Type    Glow

Plug Type    Type F glow plug

Stroke    1.13 in (28.6 mm)