35540 FS120 III Surpass Ringed 1.20 4Stroke w/Pump

This is one of the O.S. Surpass series of 4-stroke model engines.
The Surpass series is the 2nd series of 4-stroke engines (The 1st series was
the FS series discontinued and replaced by the Surpass series around 1986-7).
"Surpass" refers to this series gaining 30% more power than the previous
FS series.

FEATURES: Specially developed PD-07 pump
New 70N carb
Ball bearing-supported camshaft and crankshaft
New F-5020 Silencer
Two year warranty

INCLUDES: One Assembled Engine w/Carburetor and #F Glow Plug
One Muffler w/Manifold
One Set of Instructions O.S. Poster and Decal
(Mounting Template Is No Longer Included per O.S.)
One additional coarse needle for less sensitive carb adjustment.

REQUIRES: Fuel: 5%-15% nitromethane with 18% lubricant. Synthetic castor or
a synthetic/castor 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 because it has 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: 30.4mm (1.20")
Stroke: 27.5mm (1.08")
Power Output: 2.1 BHP at 12 000 RPM
Practical RPM Range: 2 000 - 12 000 RPM
Weight-Without Muffler: 32.5oz (921g)
Weight-With Muffler: 35.3oz (1000g)
Crankshaft Thread Size: 5/16-24
Valve Clearance: Between .04mm and .1mm (or between .0015" and .004"
measured between the valve tip and rocker arm)
Length: 102mm (4.09") from backplate to the front of the drive washer
Width: 47mm (1.85") width of engine neglecting the mounting flanges
58mm (2.28") distance between the mounting hole centers
Height: 139.5mm (5.49")
Suggested Prop(s): 14X9 14X10 14X11 15X8 15X9 15X10 16X6
Construction: Aluminum and Aluminum alloys