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Details about  O.S. FS-120S-E Surpass Ringed 4-Stroke w/oPump 35530

O.S. FS-120S-E Surpass Ringed 4-Stroke w/oPump 35530 See original listing
Item Ended
Item condition:
Apr 29, 2013 06:56:24 PDT
US $414.99
FREE Standard Shipping | See details
Item location:
Champaign, Illinois, United States


eBay item number:
Seller assumes all responsibility for this listing.
Last updated on  Apr 26, 2013 11:51:10 PDT  View all revisions

Item specifics

New: A brand-new, unused, unopened, undamaged item (including handmade items). See the seller's listing ... Read moreabout the condition


Instruction Manuals:Manual 1 (882 KB) 

STOCK# - OSMG0930 MFG# - 35530
New and unused. In the original manufacturer packaging. This ships FREE within the U.S. when using ground service. If ordering it you may add more items to your order without incurring any shipping charges if shipped within the U.S. using ground service.

   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 the fact that this series gained 30 more power than the
previous FS series.

FEATURES: 30 larger Intake Valves than the FS series
Ringed Piston
Rear-mounted updraft Carburetor
Helix Gear-Driven Camshaft
Ball Bearing-Supported Camshaft and Crankshaft
Covered under 2-YEAR WARRANTY

INCLUDES: One Assembled FS-120 Surpass w/Carb and No Pump
One #F Glow Plug
One Exhaust Header
One Exhaust Muffler
One Choke Valve Extension
One Set of Instructions Poster and Decals
(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 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 an 18 lubricant content.
Starting and Field Equipment
Propeller (see SPECS)

SPECS: Bore: 31mm (1.22 )
Stroke: 27.5mm (1.08 )
Power Output: 1.9 PS 1.87HP at 11 000 RPM
Weight-Without Muffler: 30.5oz (864g)
Weight-With Muffler: 33.3oz (944g)
Practical RPM Range: 2 000 - 11 000 RPM
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: 104mm (4.09 ) from backplate to the front of drive washer
Width: 47mm (1.85 ) width of engine neglecting the mounting flanges
58mm (2.28 ) distance between the mounting hole centers
Height: 138.5mm (5.45 )
Suggested Prop(s): 13x11 13x12 14x10 14x11 15x8 16x6 16x7 17x6
Construction: Aluminum and Aluminum alloys

Needle Settings: High Speed: 2.5 - 3 turns out from fully closed
Low Speed: Edge of larger sleeve centered looking
down the neck of the carb

COMMENTS: 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.
JBN 7/20/93
updt lmm 3/31/09

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Hitec HS-485HB Deluxe HD BB Karbonite Gear Servo
Master Airscrew 15x8 K Series G/F Nylon Propeller


International Buyers Only – Please allow 2 to 4 weeks for international deliveries. Not all international packages are shipped with tracking information. Please Note: Duties and taxes are not included in the item price or shipping charges. Please check with your local customs office prior to buying. These will be added by your local authorities upon delivery - do not confuse them for additional shipping charges. We are unable to falsify the value of the shipment because that would be illegal.

Feedback Ratings – Please contact us first if you feel that you cannot give us ratings of 5 in all
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