FS91II Pump Ring 60N Carburetor

This is a FS-91 Surpass 4-stroke Engine with Pump Unit.

This engine does not use a choke valve OR a return fuel line to the tank.
There are No Tools OR Extra Needle Valve as stated in the instructions.

FEATURES: New rear-mounted updraft 60N carb w/pressure regulator.
New rear-mounted PD-07 pump unit.
Helix gear-driven camshaft supported by ball bearings.
Ringed piston.
Does Not use choke valve but instead an electric starter to start.
Grease-packed twin-sealed corrosion-resistant rear ball bearing.
Two year warranty.

INCLUDES: One Assembled Engine w/Carburetor.
One #F Glow plug.
One Muffler w/Manifold.
One Set of Instructions O.S. Poster and Decal.
(Wrenches Choke Valve Extension and Mounting Template Are No
Longer Included per O.S.)

REQUIRES: Fuel: 5%-15% 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 the modeler must be sure to
select a fuel with at least a 18% lubricant content.
Starting and Field Equipment.
Propeller (see SPECS)

SPECS: Bore: 27.7mm (1.09")
Stroke: 24.8mm (.976")
Displacement: 14.95cc (0.912 cubic inch)
Power Output: 1.6 BHP at 11 000 RPM
Weight-Without Muffler: 22.9oz (649g)
Weight With Muffler: 24.6oz (697g)
Practical RPM Range: 2 000 - 12 000 RPM
Crankshaft Thread Size: 5/16-24
Valve Clearance: Between .04mm and .10mm (between .0015" and .004"
measured between the valve tip and rocker arm)
Length: 91.5mm (3.60") from backplate to front of drive washer.
Width: 42.6mm (1.68") width of engine neglecting the mounting flanges
52mm (2.05") distance between the centers of the mounting holes
Height: 123mm (4.88")
Suggested Prop(s): Stunt planes: 11X10 11X11 12X9.5 12X10 12X11
Scale models: 13.5X8 14X7 15X6 16X6 (12X8 & 12.5X7-3 blade)
Construction: Aluminum and Aluminum alloys