O.S. Engine 91FX  [OSMG0591]

Made for sport, but engineered for quality, the 91FX offers the energy and user-friendly features of other FX Series machines in a displacement fit for large-scale aircraft. The 91FX neatly bridges the ability space between .60-size glow engines and fuel engines, by providing the straightforward familiarity of radiance technology combined with added energy that today's large-scale modelers need. With its top output of 2.8 hp, the 91FX can put a large-scale plane through its paces with ease. With O.S.' meticulous testing and design behind it, large-scale pilots can fly the best in long-lasting reliability.

Coarse threads and an O-ring seal regarding needle valve minimize settings creep in the long run considering vibration and air leaks, supplying more routes with fewer adjustments.

Extra-long crankshaft and locknut assembly offer more thread length for better prop nut engagement and much more safety for pilots and onlookers.

A lower life expectancy crankcase profile departs room to get more head height and cooling fins-semi-squared mind design further improves air conditioning capability and gratification.

Double bearing design includes a bigger front bearing for additional durability and smoothness.

The best power plant for many Top FliteR Gold Edition Kits

SPECS

• Stock Number: OSMG0591
• Displacement: 0.912 cu in (15.0 cc)
• Bore: 1.091 in (27.7 mm)
• Stroke: 0.976 in (24.8 mm)
• Practical rpm: 2,000-16,000
• Production: 2.8 hp @ 15,000 rpm
• Body weight: 19.3 oz (550 g)
• Includes: Muffler, protection Propeller Locknut Assembly, #8 radiance plug
• Needs: gas, mount & prop
• Suggested Props: 13x8, 13x9