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O.S. - OSMG2042 OSM13875 13875 531028021518 4531028021518
Manufacturer Stock#
13875
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O.S. 21XZ-R VII On-Road
 
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O.S. 21XZ-R VII On-Road
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Stock Number
LXBCBL
Retail Price
699.99
Tower's Low Price
$399.99
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Stock Status
In Stock
Limited Quantities

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763.98  Buy Now 36.00  

Tech Notes
 
NOTES FROM OUR TECH DEPARTMENT
This is the O.S. 21XZ-R Version II ABC Engine with 21M Carburetor
for 1/8 scale On-Road Vehicles.

****** Because of the expressed racing nature of this engine, ******
****** it is NOT covered by the O.S. 2 Year Warranty ******
****** per page 8 of manual. ******

FEATURES

Tungsten-weighted silicone filled crankshaft creates optimum balance
for consistent low and mid speed torque
ABC piston and liner construction "A"luminum piston fitted to a
"B"rass cylinder liner that is "C"hrome plated
Liner has seven scavenger ports and three exhaust ports for more
efficient combustion
21M slide valve carburetor with 9mm carb reducer that restricts the
airflow helping to increase the amount of torque produced

INCLUDES

O.S. 21XZ-R Version II ABC On-Road Engine w/21M Carburetor, Exhaust
Gasket RP7 Turbo Glow Plug, 9mm Carb Reducer, Flywheel Collet,
Instruction Manual, 0.2mm Head Gasket and two Dust Caps

REQUIREMENTS

Fuel: 10-30% nitro content, 20% recommended for break-in
Exhaust System: Depending on vehicle
Glow starter, fuel tubing and track equipment

SPECIFICATIONS

Displacement: 0.213 cu in (3.49 cc)
Bore: 0.640" (16.27 mm)
Stroke: 0.661" (16.8mm)
Practical RPM: 4,000-45,000
Power Output: 2.75 PS, 2.71 HP @ 33,000 RPM
Weight: 12.06oz (343g)
Distance Between Mounting Holes Same Side: 0.83" (21mm)
Distance Between Mounting Holes Opposite Side: 1.45" (37mm)
Height Bottom of Mounting Tabs/Top of Cylinder Head: 3.45" (87.7mm)
Width of Mounting Tabs: 1.8" (45mm)
Distance from Backplate to Front Bearing: 2.6" (65.6mm)
Distance from Center of Crankshaft to Front Bearing: 1.7" (44mm)
Distance from Center of Crankshaft to Backplate: 0.85" (21.6mm)
Carburetor Settings,
Needle Valve: Approximately 3 turns open from fully closed
Throttle: Approximately 0.5mm open from factory setting with
reducer removed
Metering Needle: Rotate until slotted head is 0.5mm away from ball
link body
Mixture Control Valve: Rotate until slotted head is flush with
carb body

jxs 07/25/11
ir/jxs

– 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. 21XZ-R ABC VII On-Road Engine with 21M Carburetor. FEATURES: Tungsten weighted silicone filled crankshaft, slide valve carb with 9mm reducer for higher torque, 7 intake, 3 port exhaust cylinder liner, RP7 turbo glow plug, head gasket & instruction manual REQUIRES: Fuel, air filter, exhaust system, track equipment

Accessories for the O.S. 21XZ-R VII On-Road

Primary Accessories   Building & Field Equipment Optional Accessories
 
  Special Stock Number Product Description Parts Saver Eligible Tower's
Low Price
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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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