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O.S. - OSMG0650 OSM19210 19210 531028002166 4531028002166
Manufacturer Stock#
19210
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O.S. 120AX Ringed w/Muffler
 
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O.S. 120AX Ringed w/Muffler
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On-line Videos: Video 1 (17.2 MB) Video 2 (YOUTUBE)
Instruction Manuals: Manual 1 (2.7 MB)
Tower Catalog Page: 167

Stock Number
LXLGJ0
Retail Price
449.99
Tower's Low Price
$279.99
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Stock Status
In Stock
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Tech Notes
 
NOTES FROM OUR TECH DEPARTMENT
This is the O.S. Max Two-Stroke 1.20AX Ringed Engine with 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)
Internal Construction: Steel piston ring and liner, aluminum piston
Muffler: E-5020 "Power Box" with extension and 90 adapters
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 E-5020 Power Box
Muffler, #8 glow plug, muffler adapter, prop washer and lock nut,
needle valve extension cable,instruction manual and decal sheet,
two muffler screws, two muffler extension bolts, two long muffler
bolts.

REQUIREMENTS

Fuel: Two-Stroke with 20% lubricant and 5-20% nitromethane
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)
Practical RPM: 1,800 - 9,500 RPM
Power Output: 3.1 PS, 3.06HP/9000 RPM
Weight of engine: 29.0oz (823g) with muffler
Weight of muffler: 7.074oz (219.2g) with 90 adapter installed
Weight of muffler: 7.907oz (245g) with extension installed
Crankshaft thread size: 5/16-24
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)
Distance center to center of muffler mounting holes: 48mm (1.89")

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 without muffler, order OSMG0651. The version without the
muffler does not include the muffler extension or the 90 adapter.
At this time one would not be able to use the muffler extension and
90 adapter at the same time. The long muffler bolts are too long.

jxs 10/25/05
Updated JBM 12-20-05
updt WM 11/29/05
ir/jxs
updt lmm 3/30/09

– 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 WITH MUFFLER. FEATURES: IDEAL FOR 3D, PRECISION AND SPORT FLYING, 70D CARB, #8 GLOW PLUG, MOUNTS IN SAME SPACE AS .91 SIZE ENGINES, E-5020 POWER BOX MUFFLER REQUIRES: 2 STROKE FUEL WITH 20% LUBRICANT AND 5-20% NITROMETHANE, FIELD EQUIPMENT

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

Primary Accessories   Building & Field Equipment Optional Accessories
 
  Special Stock Number Product Description Parts Saver Eligible Tower's
Low Price
Click to Order Quantity Needed In Cart? Stock
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
8.89   In Stock
 LXRXC4 Tower Hobbies TOWER Power 10% Airplane Fuel Quart
Qty Discount Available
9.19   In Stock
Subtotal for this Group of Accessories: 24.86  
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Primary Accessories   Building & Field Equipment Optional Accessories

 
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