O.S. MAX 91FX Ring w/ E-4020 Silencer USED

USED O.S. MAX 91FX Ring w/ E-4020 Silencer L-OS19021-U

Sharing exactly the same mounting pattern as the 61FX, the 91FX offers 47% more power with almost no weight penalty!

Just like all FX series engines the 91FX has the rear needle valve assembly with the addition of a variable fuel inlet location in addition to the adjustable main needle orientation. To ease hand starting a ringed piston setup is emplyed.

Give your model a power boost from this compact powerhouse.

Propeller range : 15x8, 16x6-8, 17x6, 14x7 3blade

Physical Specifications :

• Weight    550g 19.40oz
• Displacement    14.95cc 0.91cu in.
• Bore    27.7mm 1.09in
• Stroke    24.8mm 0.980in
• Power Output    2.8PS@15000 RPM
• Practical RPM    2,000-16,000