OS Engines FS-91 Surpass II w/Pump
[FS91]

Pump feature adds responsiveness to the FS-91 Surpass

• New regulating style pump, normally only found in 1.20 class engines, delivers better response and reliability
  
  
• Rear ball bearing is rubber-sealed on both sides and greased internally to help inhibit bearing corrosion
  
  
• The crankshaft, cam shaft and piston ring are all plated to further resist corrosion
  
  
• Features a reversible carb which allows the needle valve to face either the left or right side of the engine
  
  
• Black anodized rocker cover
  
  
• A large-volume muffler offers better noise reduction for milder sound

SPECIFICATIONS
Stock Number: OSMG0890
Displacement: 0.912 cu in (14.95 cc)
Bore: 1.091 in (27.7 mm)
Stroke: 0.976 in (24.8 mm)
Practical rpm: 2,000-12,000
Output: 1.6 hp @ 11,000 rpm
Weight w/muffler & manifold: 23.9 oz. (678 g)
Weight w/o muffler & manifold: 22.2 oz. (630 g)
Recommended Props: Stunt: 11x10, 11x11, 12x9.5, 12x10, 12x11; Scale: 13.5x8, 14x7, 15x6, 16x6, 12x8 3-blade, 12.5x7 3-blade
35910 FS-91 II Parts Listing