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O.S. - OSMG0990 OSM35410 35410 531028019461 4531028019461
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O.S. 110FS-a Alpha Series Ringed 4-Stroke w/Muffler
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O.S. 110FS-a Alpha Series Ringed 4-Stroke w/Muffler
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Product Reviews: Review 1
Instruction Manuals: Manual 1 (2.9 MB)
Tower Catalog Page: 169

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Tech Notes
This is the O.S. Engines FS110-a 4-Stroke Aircraft Engine
with 5040 Silencer.


Muffler adjusts in or out with threaded header pipe and rotates a
full 360 for more mounting options with fewer modifications
Continuous lubrication system recirculates excess oil instead of
venting it for better performance and longer engine life
60Y carburetor with longer venturi for leak-free seals, less fuel
blow back and optimal air/fuel mixing
Two year limited warranty


O.S. Engines FS110-a 4-Stroke Engine, muffler, needle valve
extension cable, F glow plug and instruction manual


Fuel: 5-20% nitro content with at least 18% lubricant content
Propeller: Sport & Aerobatic 13 x 9-11, 14 x 8-10
Scale 15 x 8, 16 x 8
Electric starter and other field equipment


Displacement: 1.10cu in (18.0cc)
Bore: 1.20" (30.4mm)
Stroke: 0.98" (24.8mm)
Practical RPM: 2,000 - 11,000
Power Output: 1.8 PS, 1.77 HP 10,000 RPM
Weight: 19.2oz (600g)
Muffler Weight: 2.3oz (72g)
Crankshaft Size: 5/16-24
Height from Mounting Tab/top of Cylinder Head: 4.1" (103.8mm)
Height from Crankcase Bottom/top of Cylinder Head: 4.9" (125.4mm)
Width at Mounting Tabs: 2.4" (61mm)
Width of Crankcase Below Mounting Tabs: 1.7" (42.6mm)
Length from Carb to Prop Washer: 4.5" (114.5mm)
Length from center of Crankcase to Prop Washer: 2.6" (66.5mm)
Length from center of Crankcase to center of Carb: 1.8" (46.3mm)
Needle Valve Setting: High Speed: 3-4 turns from closed
Mixture Control (low speed): Flush with carb
body, then 3/5 turn in.

jxs 12/01/08
updt lmm 4/6/09

– If you need more information, use these O.S. resources –
Click Here: Manufacturer's Product Web Page
Email: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970
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Accessories Needed
This is the O.S. Engines FS110-a 4-Stroke Aircraft Engine W/5040 Silencer. FEATURES: Fully adjustable muffler requires less modifications to aircraft, continuous lubrication system, longer carb venturi for better seal less fuel blow back & optimal fuel mixture, F glow plug, needle valve extension cable REQUIRES: 5-20% nitro content w/at least 18% lubricant, field equipment

Accessories for the O.S. 110FS-a Alpha Series Ringed 4-Stroke w/Muffler

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  Special Stock Number Product Description Parts Saver Eligible Tower's
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 LXRXC4 Tower Hobbies TOWER Power 10% Airplane Fuel Quart
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9.19   In Stock
Subtotal for this Group of Accessories: 9.19  

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