O.S FS120 III Surpass w/Pump 4-Stroke aircraft engine
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.
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FEATURES: Specially developed PD-07 pump
New 70N carb
Ball bearing-supported camshaft and crankshaft
New F-5020 Silencer
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% 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)
Manufacturer: N/A
SKU: JT-1897
