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OS Max

OS Max 91 FX (Ringed) w/Muffler

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Replacement Parts for OS Max 91 FX (Ringed) w/Muffler  

HP ITEM NUMBER:
705497
DESCRIPTION:
OS Max 91 FX (Ringed) w/Muffler
MFR. NUMBER:
OSMG0591

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Since 1972 Your satisfaction has been our number 1 priority!

OS Max 91 FX (Ringed) w/Muffler - Item No. 705497

MORE INFORMATION   ACCESSORY ITEMS

 

OS Max 91 FX (Ringed) w/Muffler

Designed for sport, but engineered for excellence, the .91 FX offers the power and user-friendly features of other FX Series engines in a displacement fit for large-scale aircraft. The .91 FX neatly bridges the power gap between .60-size glow engines and gas engines, by offering the easy familiarity of glow technology combined with the added power that today's large-scale modelers demand. With its top output of 2.8 bhp, the .91 FX can put a large-scale plane through its paces with ease. And with O.S.' meticulous testing and design behind it, large-scale pilots can fly the best in long-term dependability.

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More Information About the 91 FX (Ringed) w/Muffler

Multi-position remote-mounted needle valve design offers greater flexibility and safety for the pilot. The needle valve can be positioned upright or to the side to avoid cowl modifications and preserve scale looks.

 

  • Coarse threads and an O-ring seal on the needle valve minimize settings creep over time due to vibration and air leaks, providing more flights with fewer adjustments.
  • Extra-long crankshaft and locknut assembly offer more thread length for better prop nut engagement and more safety for pilots and onlookers.
  • A lower crankcase profile leaves room for more head height and cooling fins-semi-squared head design further enhances cooling capacity and performance.
  • Dual bearing design includes a larger front bearing for added durability and smoothness.
 

SPECIFICATIONS

  • Displacement: 0.912 cu in (15.0cc)
  • Bore: 1.091 in (27.7mm)
  • Stroke: 0.976 in (24.8mm)
  • Practical RPM: 2,000-16,000
  • Output: 2.8 bhp (ps) @ 15,000 rpm
  • Weight: 19.3 oz (550g)
  • Includes: Muffler, Safety Propeller Locknut Assembly
  • Requires: fuel, mount, prop & glow plug
  • Recommended Propellers:
        Pattern: 13x11, 13x13, 14x10 or 14x11
        Sport: 13x8, 13x9, 15x8 or 16x6 (depending upon fuel used, etc.)


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Original Replacement Parts
   Order No.  Mfr No.  Description Status Cart Price 
705940 OSMG2691 OS Max Glow Plug - #8 Standard Long In Stock
$7.49


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