12668 OS MAX 25FX

OS Engines MAX FX series has for years set the standard for the power units for high-performance sport and aerobatic airplane models. Perfectly sophisticated design, quality materials and excellent craftsmanship traditionally makes choice no. 1 for modelers who will not settle for average.

MAX 25 FX is a high performance two-stroke engine with glow plug with the crankshaft mounted on a pair of ball bearings designed for sports and competitive sports aerobatic models of all kinds. It is equipped with a carburetor type dvoujehlovým 20D with separate main needle mounted on the rear cover of the engine. In the basic configuration is provided likewise the expansion type muffler 892. Exhaust neck orientation can be changed by rotating the rear shock absorber 360 °.

The crankshaft has a thread for propeller nut UNF 1/4-28
Suggested propeller dimensions: Running: 9x6 "/ Coach and Sport: 9 × 5", 9x6 ", 9.5 × 5" × 10 5 "/ Acrobat 9 × 6", 9.5 x 5 "
Recommended fuel tank: 200-220 ml; 200 ml container is enough for 12 to 13 minutes of flight, provided they still do not fly at full throttle.
Recommended fuel: at least 18% castor or synthetic oil (or. A mixture of synthetic and castor oil), 5-20% nitromethane.
Recommended Plug: OS MAX No. 6 (formerly A3), when using fuel with a higher content of nitromethane OS MAX No. 7 or No. 8th
Set engine includes: motor MAX 25FX with RC 20D carburetor.

Displacement [cc]    4.07
Number of cylinders    1
Bore [mm]    18
Stroke [mm]    16
Operating speed [rpm]    2500-19000
Engine power (at 18,000 rpm) [W]    620
Power (at 18,000 rpm) [HP]    0.85
Weight (motor) [g]    248
Weight (silencer) [g]    52
Recommended tank volume [ml]    200-220
Recommended candle    OS . MAX No. 6 (formerly A3), No.7, No.8
Propeller nut thread    UNF 1 / 4-28