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O.S. - OSMG0651 OSM19218 19218 531028002197 4531028002197
Manufacturer Stock#
19218
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O.S. 120AX Ringed w/o Muffler
 
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O.S. 120AX Ringed w/o Muffler
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Tower Catalog Page: 199

Stock Number
LXLGH9
Retail Price
399.99
Tower's Low Price
$244.98
Stock Status
(Estimated)
Late Oct

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Tech Notes
 
NOTES FROM OUR TECH DEPARTMENT
This is the O.S. Max Two-Stroke 1.20AX Ringed Engine without Muffler.

FEATURES

Model Application: Ideal for 3D, Precision and Sport flying
Mounting Application: Mounts in same space as the .91FX (actual
mounting dimensions vary slightly, see SPECS)
Construction: Steel piston ring and liner, aluminum piston
Carburetor: 70D with rearward angled needle valve for safety
Glowplug: O.S. #8 supplied with engine, A5 (OSMG2693) will also work
Warranty: Two-year limited

INCLUDES

O.S. Max Two-Stroke 1.20AX Ringed Engine with #8 glow plug, prop
washer and nut, needle valve extension set, instruction manual
and decal set

REQUIREMENTS

Fuel: Two-Stroke with 20% lubricant and 5-20% nitromethane
Muffler: E-5020 "Power Box"
Propeller: 15x10-12 or 16x8-10
Field Equipment: Glow starter, fuel filter, fuel pump, fuel tubing

SPECIFICATIONS

Displacement: 1.218 cu in (19.96cc)
Bore: 1.197" (30.4mm)
Stroke: 1.083" (27.5mm)
Crankshaft thread size: 5/16-24
Practical RPM: 1,800 - 9,500 RPM
Power Output: 3.1ps/9000 RPM
Weight: 22.82oz (647g) without muffler
7.074oz (219.2g) with 90 adapter installed
7.907oz (245g) with extension installed

Distance Between Mounting Holes Same Side: 0.98" (25mm)
Distance Between Mounting Holes Opposite Side: 2.3" (58mm)
Distance Center of Crankcase to End of Crankshaft: 4.3" (109.5mm)
Distance Center of Crankcase to Drive Hub: 2.7" (69.8mm)
Width Between Mounting Tabs: 2.6" (67mm)
Width of Crankcase Below Mounting Tabs: 1.8" (46.5)
Length from Backplate to End of Crankshaft: 5.5" (139.9mm)
Length from Backplate to Drive Hub: 3.9" (100.2mm)
Height/Bottom of Crankcase to Top of Cylinder Head: 4.3" (109.2mm)
Height/Bottom of Mounting Tabs/Top of Cylinder Head: 3.4" (85.7mm)

Needle Settings: High Speed: 2 - 2.5 turns out from fully closed
Low Speed: 3/4 turn out from fully closed with the
throttle fully closed

COMMENTS

For version with muffler, order OSMG0650.

jxs 10/25/05
Updated JBM 12-20-05
Updated JBM 3-7-06
ir/jxs
updt lmm 3/31/09

– 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
  Postal Address:
O.S.
3002 N. APOLLO DRIVE, SUITE #1
CHAMPAIGN, IL 61822

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Accessories Needed
 
COMPLETION NOTES FROM THE TECH DEPARTMENT
THIS IS THE O.S. MAX 1.20AX WITHOUT MUFFLER. FEATURES: IDEAL FOR 3D, PRECISION AND SPORT FLYING, 70D CARB, #8 GLOW PLUG, MOUNTS IN SAME SPACE AS .91 SIZE ENGINES REQUIRES: 2 STROKE FUEL WITH 20% LUBRICANT AND 5-20% NITROMETHANE, POWER BOX MUFFLER, FIELD EQUIPMENT

Accessories for the O.S. 120AX Ringed w/o Muffler

Primary Accessories   Building & Field Equipment Optional Accessories
 
  Special Stock Number Product Description Parts Saver Eligible Tower's
Low Price
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Status
 LXK129 Great Planes Silicone Fuel Tubing Standard 3'
Qty Discount Available
2.99   In Stock
 LXK134 Great Planes Ultra Precision Fuel Filter
Qty Discount Available
3.79   In Stock
 LXZ929 Master Airscrew 16x8 Beechwood Propeller
Qty Discount Available
9.99   In Stock
 LXRXC4 Tower Hobbies TOWER Power 10% Airplane Fuel Quart
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9.19   In Stock
Subtotal for this Group of Accessories: 25.96  
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