MOTOR OS FS-81-A P BOMBA 4 STROKE 34820

This is the glow powered O.S. 81FS-a P 4-Stroke Aircraft Engine with the PD-08 Fuel Pump.

FEATURES:

• Same mounting dimensions as the O.S. Max FS-70 Surpass II
• Ideal fit for 60 size planes
• Fuel pump delivers fuel consistently to the engine at all times regardless of aircraft's attitude and fuel level
• Specially designed lubrication system eliminates need for crankcase ventilation 61R carburetor with attached regulator F5030 muffler with rubber O-ring in multi position manifold to help prevent oil leakage

INCLUDES: 

• O.S. 81FS-a P 4-Stroke Aircraft Engine, carburetor, muffler, header, type F glow plug, PD-08 pump and instruction manual

REQUIRES: 

• Fuel: 10%-20% nitromethane with 18% lubricant. Synthetic, castor, or a synthetic/castor lubricant blend may be used.
• NOTE: Certain four-cycle fuels cannot be used due to low oil content.
• However, SOME four-cycle fuels such as the Wildcat 4-Cycle 15% may be used due to its 18% oil content.
• When choosing fuels for this engine, be sure to select a fuel with at least an 18% lubricant content.
• Propeller: Sport and aerobatic scale 13x7-9, 14x6-7

SPECS: 

• Displacement: 0.809 cu in (13.26cc)
• Bore: 1.091" (27.7mm)
• Stroke: .866" (22mm)
• Weight with Muffler: 22oz (624g)
• Practical RPM Range: 2200-10,000
• Output: 1.28 PS, 1.28 HP @ 10,000 RPM
• Height from Bottom of Mounting Tab to Top of Crankcase: 3.8" (97mm)
• Width of Crankcase below Mounting Tabs: 1.6" (40mm)
• Center of Mounting Holes Same Side: .83" (21mm)
• Center of Mounting Holes Opposite Side: 2" (50.8mm)
• Center of Front Mounting Hole to Drive Washer: 2.2" (55.5mm)
• Center of Rear Mounting Hole to Drive Washer: 3" (76.2mm)
• Center of Crankcase to Center of Needle Assembly: 1.4" (35.6mm)
• Center of Crankcase to Outer Edge of Needle Assembly: 1.8" (45.7mm)
• Muffler Angle in Relation to Engine: 10°
• Carburetor Needle Settings: Needle Valve, 1-1/2 - 2 turns open from fully closed