O.S. Engines, FS-70 Ultimate 4-Stroke w/Pump

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OSMG0875      FS-70 Ultimate 4-Stroke w/Pump

TECH NOTES

This is the O.S. Max FS-70 Ultimate 4-Stroke Engine with Pump.

FEATURES: The FS-70 Ultimate is noticeably more compact than the FS-70 Surpass
II making for easy installation in a wider range of aircraft
Slide Valve #60U Carburetor for quick and accurate throttle response,
also equipped with regulator that stabilizes the pressurized fuel
for reliable performance during aerobatic maneuvers
Holes drilled in drive washer to reduce weight
Two year limited warranty

INCLUDES: One O.S. Max FS-70 Ultimate 4-Stroke Engine with Pump, type F glow
plug, muffler, decal sheet, instruction manual

REQUIRES: 13x7-8 Propeller for sport and stunt aircraft
13x6   Propeller for aerobatic aircraft
Glow fuel with 5-30% Nitromethane and 18% (minimum) oil content.
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, the modeler must be sure to
select a fuel with at least a 18% lubricant content.
Starting and Field Equipment

SPECS:    Displacement: 0.698 cu in (11.45 cc)
Bore: 1.091" (27.7mm)
Stroke: 0.748" (19.0mm)
Practical RPM Range: 2000-13000
Output: 1.2ps @ 11000 RPM
Weight-Without Muffler: 16.4oz (465g)
Weight-With Muffler: 17.7oz (502g)
Weight of Muffler: 1.8oz (51g)
Crankshaft Size: 1/4-28
Distance/crankcase bottom to top of rocker cover:    4.2" (105.4mm)
Distance/bottom of mounting ears/top of rocker cover: 3.4" (87.4mm)
Distance/back of carb to center of engine:           2"    (50.2mm)
Distance/back of carb to outer end of drive washer:  4.3" (109.7mm)_
Distance/back of carb to end of crankshaft:          5.7" (144.2mm)
Distance/center of engine to end of crankshaft:      3.7"  (94mm)
Distance/backplate to end of crankshaft:             4.6" (118.1mm)
Distance/drive washer to end of crankshaft:          1.3"  (34.5mm)
Width between mounting holes same side:              0.8"  (20mm)
Width between mounting holes opposite side: 1.8" (45mm)
Width/outer edges of mounting ears: 2.1" (54mm)
Length of muffler: 5.6" (142mm)
Distance/muffler center to bottom of mounting ears: 2.3"  (58.9mm)
Distance/center of needle valve/bottom/mounting ears: 1.1" (29.6mm)
Angle of muffler in relation to engine: 20°

COMMENTS: How to hook up the pump.
The nipple in the center of the pump is to draw fuel from the tank.
The nipple at the 2 o'clock position is from pump to carb.
The nipple at the 6 o'clock position is to pressurize the tank.
The nipple at the 10 o'clock position is for a air intake.

ACCESSORIES

THIS IS THE O.S. MAX FS-70 ULTIMATE 4-STROKE ENGINE WITH PUMP.
FEATURES: SMALLER THAN FS-70 SURPASS TO FIT IN A WIDER VARIETY OF AIRCRAFT,
SLIDE VALVE CARB, PUMP INSURES CONSTANT FUEL DELIVERY AT ANY ATTITUDE, HOLES
DRILLED IN DRIVE WASHER TO LIGHTEN WEIGHT, INCLUDES TYPE F GLOW PLUG
REQUIRES: FUEL WITH 5-30% NITRO, 18% OIL CONTENT, FIELD EQUIPMENT