MOTOR OS FS-40S SUPERPASS 4 TEMPOS 35220

This is a FS-40 Surpass Four-Stroke Model Aircraft Glow Engine.

FEATURES:

Rear-mounted updraft Carburetor

30% larger Intake Valves than the original FS series

Helix gear-driven Camshaft

Ringed piston

Ball bearing-supported Camshaft and Crankshaft

Two Year Warranty

INCLUDES: 

One Assembled engine w/Carb and #F 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 castor/synthetic 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, 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: 21.2mm (.835")

Stoke: 18.4mm (.724")

Power Output: .65 PS, 0.64 HP at 12,000 RPM

Weight- w/o muffler: 12.5oz (354g)

With muffler: 13.3oz (377g)

Practical RPM Range: 2,200 - 12,000 RPM

Crankshaft Thread Size: 1/4-28

Valve Clearance: Between .04mm and .1mm (.0015" and .004") Measured between the valve tip and rocker arm.

Length: 77.5mm(3.05") from backplate to the front of the drive washer

Width: 32.5mm (1.28") width of engine neglecting the mounting flanges 42mm (1.65") side-to-side mounting holes on-center

Height: 98mm (3.85")

Suggested Prop(s): 10x7.5, 11x6, 12x5, 12x6 (2-blade), 9x7 (3-blade)

Construction: Aluminum and aluminum alloy

Needle Settings:

High Speed: 2 - 2.5 turns out from fully closed

Low Speed (air bleed screw): tip of screw 1/2 way across the small hole in the back of the carb

COMMENTS: 

The Surpass series is the 2nd series of 4-stroke engines. The first FS series was discontinued and replaced by the Surpass series around 1987. "Surpass" refers to this series gaining 30% more power than the previous FS-series engines.

Some differences between 4-stroke and 2-stroke engines;

4-strokes are quieter

4-strokes get better fuel economy

2-strokes generate more rpm (11,000-13,000 RPM with prop while 4-strokes rev to around 9,500 RPM)

4-strokes generate much more torque and will swing a larger prop.

4-strokes have a realistic sound like a real aircraft engine.