Shopping Cart
Shop Now...
R/C Hobby Products
Additional Hobby Products
Shop by Brand Easy Pay Shop for Parts
New Items
Special Sales
  Electric Motors, Engines & Accessories > Engines Glow Fuel > Engines R/C Glow Fuel Car 2-Stroke - .16 & Up [View Top Sellers for this Category] Bookmark this Page

O.S. - OSMG2080 OSM12520 12520 531028020351 4531028020351
Manufacturer Stock#
A Closer Look at This Product
  Tech Notes

Accessories Needed

Possible Substitutions

Replacement & Optional Parts

Easy RC: Engines

Browse O.S.

Manufacturer's Product Web Page

O.S. 25XZ (P) ABC w/21JN Slide Carb
Click for parts for this item
O.S. 25XZ (P) ABC w/21JN Slide Carb
View Larger Picture

On-line Videos: Video 1 (95.8 MB) Video 2 (YOUTUBE)
Instruction Manuals: Manual 1 (2.4 MB)
Tower Catalog Page: 202

Stock Number
Stock Status
Possible Substitutions

Tech Notes
        This is the 2-stroke O.S. Max 25XZ (P) 1/8 scale Truggy Engine.

****** 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: Designed for 1/8 scale truggy racing competitions Meets ROAR regulations ABC piston and liner construction "A"luminum piston fitted to a "B"rass cylinder liner that is "C"hrome plated Three needle 21JN slide valve carburetor 8mm red carb insert for smaller tracks that restrict air intake Ten fin blue anodized cooling head with inner head button P3 ultra hot turbo glow plug

INCLUDES: O.S. Max 25XZ (P) Truggy Engine with instruction manual, 8mm carb reducer, exhaust gasket, dust cap set, instruction manual and P3 turbo glow plug

REQUIRES: Fuel: 10-30% nitro content (20% for break-in) Air Filter: MSFG1660 Exhaust system depending on vehicle, see COMMENTS Track equipment

SPECS: Displacement: 0.25 cu in (4.09cc) Output: 3.1 PS, 3.06 HP/33,000 RPM Bore: 0.689" (17.5mm) Stroke: 0.669 cu in (17mm) Practical RPM Range: 4,000-39,000 RPM Weight: 13.05oz (370g) Distance between Mounting Holes Same Side: 0.83" (21mm) Distance between Mounting Holes Opposite Side: 1.4" (37mm) Length from Backplate to Drive Washer: 2.6" (65.6mm) Width of Mounting Flanges: 1.8" (45mm) Width of Crankcase Below Mounting Flanges: 1.2" (31.6mm) Distance from Crankcase Center to Drive Washer: 1.7" (44mm) Height/bottom of Mounting Flanges/top of Cylinder Head: 3.7" (93.2mm) Height/bottom of Crankcase/top of Cylinder Head: 4.3" (109mm) Needle Settings: Preset at factory, start engine as is. If adjustments are ever required, make them in small increments. High Speed: 3.5 turns out from fully closed Metering Needle (low speed): Rotary: flush with carb body Slide: Flush then 1/2 turn in Throttle Stop Screw: .5mm out from fully closed

COMMENTS: The O.S. Max T-2060 WN Speed Tuned Pipe OSMG2939, OSMG2938 is an ideal exhaust system for the 25XZ. Flywheel sets are required (OSMG2648 for Mugen, OSMG2649 for Kyosho, both sold separately) for certain truggy models.

jxs 02/15/10 ir/jxs

– If you need more information, use these O.S. resources –
Click Here: Manufacturer's Product Web Page
Web Site:
Phone: 217-398-8970
  Postal Address:

Click here for Units of Measure Conversion Calculators

Accessories Needed
This is the O.S. Max 25XZ (P) Competition 1/8 scale Truggy Engine. FEATURES: 10-fin cooling head, 21JN slide valve carburetor w/8mm reducer, P3 turbo glow plug REQUIRES: 10-30% nitro fuel, air filter, exhaust system, track equipment

Accessories for the O.S. 25XZ (P) ABC w/21JN Slide Carb

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
 LXUM80 Duratrax Glow Starter C Battery
Qty Discount Available
7.99   In Stock
 LXCMDL Fuji Batteries C Alkaline Battery (2)
Qty Discount Available
4.69   In Stock
 LXDNV1 Motor Saver 1/8 Off-Road Truck Filter
Add to Wish List
13.99   Late Apr
 LXRXC9 Tower Hobbies TOWER Power 20% Car Fuel Quart
Qty Discount Available
7.69   In Stock
Subtotal for this Group of Accessories: 34.36  
Click to Order all items listed in this Group of Accessories    Buy This group of Accessories

Primary Accessories   Building & Field Equipment Optional Accessories

Tower Hobbies Has Been Serving Hobbyists Since 1971   •   Call 800-637-6050 or 217-398-3636
BizRate Customer Certified (GOLD) Site Shop Now Using PayPal
We accept the following:

Unauthorized use of any materials presented here is prohibited. Copying or reproducing any elements from this page is not permitted. All prices, descriptions and availability subject to change. Displayed within some areas of our web site, the Retail Price is suggested by the manufacturer or supplier, or estimated in keeping with standard industry practice. It may not represent the prevailing price in your area or a price that Tower Hobbies has ever offered for the item.
Follow Tower Hobbies On