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  Electric Motors, Engines & Accessories > Engines Glow Fuel > Engines R/C Glow Fuel Car 2-Stroke - .0 -.15 Bookmark this Page

O.S. - OSMG1991 OSM11680 11680 531028020771 4531028020771
Manufacturer Stock#
11680
A Closer Look at This Product
  Tech Notes

Accessories Needed

Replacement & Optional Parts

Easy RC: Engines

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O.S. 12XZ Spec II Speed Tuned Engine
 
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O.S. 12XZ Spec II Speed Tuned Engine
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On-line Videos: Video 1 (5.1 MB)
Instruction Manuals: Manual 1 (2.7 MB)

 
Stock Number
LXAAAV
Stock Status
Discontinued
   
 

Tech Notes
 
NOTES FROM OUR TECH DEPARTMENT
This is the O.S. 12XZ Speed Tuned Spec II Engine.

FEATURES

Special coating on crankshaft reduces friction and wear
Tungsten weights for better balance at high RPM
Machined aluminum outer head with holes drilled for lighter weight
and better cooling
Newly designed crankcase and liner port for increased torque at low
to mid speed
12F(B) slide valve carburetor

INCLUDES

O.S. 12XZ(P) Speed Tuned Spec II Engine, Carburetor, 5.5mm Carb
Reducer, RP6 Turbo Glow Plug, Exhaust Gasket, two Dust Caps and
Instruction Manual

REQUIREMENTS

Fuel: 10-30% nitro content, 20% recommended for break-in
Exhaust System: Depending on vehicle
Air cleaner assembly, glow starter and track equipment

SPECIFICATIONS

Displacement: 0.128cu in (2.0cc)
Bore: 0.543" (13.8mm)
Stroke: 0.55" (14.0mm)
Practical RPM: 5,000 - 44,000
Power Output: 1.75 PS, 1.73 HP @ 35,000rpm
Weight: 7.76oz (220g)
Height from crankcase bottom to top of cylinder head: 3.54" (90mm)
Height/crankshaft center to top of cylinder head: 3.01" (76.6mm)
Width including mounting tabs: 1.53" (39mm)
Width not including mounting tabs: 1" (25.4mm)
Width between mounting holes same side: 0.43" (11mm)
Width between mounting holes opposite side: 1.23" (31.4mm)
Cylinder head diameter: 1.93" (49mm)
Length of exposed crankshaft: 1.16" (29.5mm)
Length from backplate to front bearing: 1.96" (50mm)
Length from backplate to end of crankshaft: 3.1" (79.5mm)
Internal thread size at end of crankshaft: 1/4-28
Carburetor Settings:
Needle Valve, Approximately 2-1/2 turns open from fully closed
Throttle Stop Screw, Approximately 1mm visible from carb throat
Mixture Control Valve: Rotate until slotted head is flush with
carburetor body
(Make adjustments only in small increments. Refer to manual for
full break-in and carburetor adjustment instructions)

COMMENTS

Some notes on Slide Valve and Rotary Carburetors:
Rotary Carbs offer a larger response in the middle of the power
band. This works well for off-road applications when throttle
response must be varied.
Slide Valve Carbs provide greater response at the beginning and end
of the power band. This works well for on-road and racing
applications for fast take-offs and high speed.

jxs 08/20/10
ir/jxs

– If you need more information, use these O.S. resources –
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

Click here for Units of Measure Conversion Calculators

Accessories Needed
 
COMPLETION NOTES FROM THE TECH DEPARTMENT
This is the O.S. 12XZ(P) Speed Spec II Engine. FEATURES: Special crankshaft coating reduces friction & wear, tungsten weights for better balance at high RPMs, machined head with holes for lighter weight & better cooling, 12F(B) slide valve carburetor REQUIRES: Fuel and track equipment, exhaust system depending on vehicle

Accessories for the O.S. 12XZ Spec II Speed Tuned Engine

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
 LXRXC9 Tower Hobbies TOWER Power 20% Car Fuel Quart
Qty Discount Available
10.69   In Stock
Subtotal for this Group of Accessories: 10.69  

Primary Accessories   Building & Field Equipment Optional Accessories

 
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