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  Electric Motors, Engines & Accessories > Engines Glow Fuel > Engines R/C Glow Fuel Marine 2-Stroke - .20-.40 Bookmark this Page

O.S. - OSMG1621 OSM13951 13951 531028021365 4531028021365
Manufacturer Stock#
13951
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O.S. 21XZ-M 3.5cc Inboard Marine Engine
 
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O.S. 21XZ-M 3.5cc Inboard Marine Engine
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Instruction Manuals: Manual 1 (1.6 MB)
Tower Catalog Page: 197

Stock Number
LXBBLZ
Retail Price
699.99
Tower's Low Price
$429.99
Stock Status
In Stock
Limited Quantities

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Quantity Discount
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Special Stock Number Units at this Price Tower's Low Price Click to Order Quantity Discount Savings
 L5BBLZ02
O.S. 21XZ-M 3.5cc Inboard Marine Engine Add to Wish List
821.28  Buy Now 38.70  

Tech Notes
 
NOTES FROM OUR TECH DEPARTMENT
             This is the O.S. 21XZ-M 3.5cc Inboard Marine Engine.

****** Because of the competition nature of this engine,****** ******it is NOT covered by the O.S. 2 Year Warranty.******

FEATURES: Designed expressly for 21 class boat racing 21D big bore carburetor allows use of high nitro fuel Blue anodized water cooled head

INCLUDES: O.S. 21XZ-M 3.5cc Marine Engine with 0.2mm Head Gasket, Silicone Exhaust Seal, RP7 Turbo Glow Plug, two Dust Caps and Instructions

REQUIRES: Glow Fuel: Boat blend with 10-30% nitromethane content, use 20% for break-in Exhaust system depending on boat Glow plug igniter

SPECS: Displacement: .21 cu in (3.5cc) Bore: 0.640" (16.27mm) Stroke: 0.661" (16.8mm) Practical RPM: 4,000 - 45,000 Power Output: 2.75 PS, 2.71 HP @ 33,000RPM Crankshaft Size: 1/4-28 Carburetor Settings: Needle Valve; 1.5 turns from fully closed Mixture Control Valve: Turn clockwise 10 to lean mixture or counterclockwise to richen mixture, adjust in steps of no more than 45-90 Distance between mounting hole centers same side: 0.83" (21mm) Distance between mounting hole centers opposite side: 1.4" (37mm) Distance/mounting tab to center of exhaust: 1.1" (28.5mm) Distance/mounting tab to center of cooling inlet: 2.2" (55.6mm) Distance from exhaust center to mounting flange bottom: 1.1" (28.5mm) Width not including mounting flanges: 1.2" (31.6mm) Width including mounting flanges: 1.8" (45mm) Height bottom of crankcase to top of intake: Height bottom of mounting flanges to top of intake: 2.6" (66.1mm) Length from backplate to end of crankshaft: 3.4" (86.5mm) Length from backplate to front bearing: 2.5" (64.5mm) Length from crankcase center to front bearing: 1.7" (44mm)

jxs 05/24/11 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-M 3.5cc Inboard Marine Engine. FEATURES: Designed for 21 class boat racing, RP7 turbo glow plug, blue anodized cooling head REQUIRES: Boat blend fuel with 10-30% nitro content, exhaust system and shore equipment

Accessories for the O.S. 21XZ-M 3.5cc Inboard Marine 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
 LXK129 Great Planes Silicone Fuel Tubing Standard 3'
Qty Discount Available
2.79   In Stock
 LXRXC4 Tower Hobbies TOWER Power 10% Airplane Fuel Quart
Qty Discount Available
6.69   In Stock
Subtotal for this Group of Accessories: 9.48  
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Primary Accessories   Building & Field Equipment Optional Accessories

 
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