FS81-A Ring 60RA Carb F5030 Muffler

This is the glow powered O.S. 81FS-a 4-Stroke Aircraft Engine.

**Additional Technical Info Will Be Added When It Becomes Available.**

FEATURES: Same mounting dimensions as the O.S. Max FS-70 Surpass
Ideal fit for 60 size planes
Specially designed lubrication system eliminates need for crankcase
ventilation
60RA carburetor
F5030 muffler with rubber O-ring in multi position manifold to help
prevent oil leakage

INCLUDES: O.S. 81FS-a 4-Stroke Aircraft Engine carburetor muffler type
F glow plug 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%
(CATP9109) 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 or 14x6-7

SPECS: Displacement: 0.809 cu in (13.26cc)
Bore: 1.091" (27.7mm)
Stroke: 0.866" (22.0mm)
Weight with Muffler: 19.63oz (556g)
Practical RPM Range: 2200-12 000
Output: 1.3hp @ 11 000 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: 0.83" (21mm)
Center of Mounting Holes Opposite Side: 2" (50mm)
Center of Front Mounting Hole to Drive Washer: 2.2" (55.5mm)
Center of Rear Mounting Hole to Drive Washer: 3" (76.5mm)
Center of Crankcase to Center of Needle Assembly: 1.4" (36mm)
Center of Crankcase to Outer Edge of Needle Assembly: 1.8" (45mm)
Muffler Angle in Relation to Engine: 10?