O.S - MAX-75AX(61A) W/E-4040 Silencer image

O.S - MAX-75AX(61A) W/E-4040 Silencer

Manufacturer: O.S Engines Product Code: 17400M

MAX-75AX(61A) W/E-4040 Silencer 2 Stroke Engine

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  • Fits the same mount and bolt pattern as the 61FX.
  • The angular head design looks great and significantly increases surface area for better cooling.
  • Includes the new "Power Box" muffler, designed with more volume for increased power while still being very compact.
  • A diagonally-placed needle means no remote needle valve is needed.


  • Displacement: 0.75 cu in (12.3 cc)
  • Bore: 1.02 in (25.8 mm)
  • Stroke: 0.93 in (23.5 mm)
  • Practical rpm: 2,000-16,000
  • Output: 2.4 hp @ 15,000 rpm
  • Weight: 19.4 oz (550 g)
  • Recommended Props: 14x6, 14x8, 15x7