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21TM ABC .21 Engine with Manifold: 2.5 and 3.3 T-Maxx

Item No. OSMG2083
Brand Logo
5 out of 5 Customer Rating

21TM ABC .21 Engine with Manifold: 2.5 and 3.3 T-Maxx

Item No. OSMG2083
$354.99
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Product Details

Key Features
  • Adapts perfectly to the Traxxas E-Z Start or pull-start systems with no modifications
  • Included manifold is specially designed to fit directly into the T-Maxx
  • Traxxas' clutch assembly bolts right to the crankshaft with no modifications
  • Oversized cooling fins on crankcase helps to keep engine cooler
  • Three needle slide valve carburetor with fins to help cool the fuel as it enters the engine
  • High-performance long reach O.S. glow plug suitable for off-road applications that require constantly varying speed
  • Two year limited warranty
In The Box
  • One O.S. Max 21TM Engine with T-Maxx Manifold
  • LC3 glow plug
  • 11K slide valve carburetor
  • exhaust gasket
  • manifold spring
  • instruction manual
Needed to Complete
  • Installing in vehicle
  • Air filter
21TM ABC .21 Engine with Manifold: 2.5 and 3.3 T-Maxx

A performance boost for one of R/C's most popular trucks!

Boost the 4WD performance power in your Traxxas® T-Maxx™ with the 21TM engine from O.S.! It's the perfect upgrade for your monster masher – because it's a direct fit for Traxxas EZ-Start® or pull-start systems, as is the manifold and clutch assembly!


O.S. Two Year Limited Warranty
  • The 21TM adds more power and displacement than the 18TM – and without modification!
  • Retrofits into the same mounting pattern, and the Traxxas clutch assembly bolts right on.
  • The special manifolds adapt perfectly to existing pull-start or EZ-Start® systems.
  • Reliable, lightweight and easy to operate – and both include a 3-needle carb for more precise tuning and an LC3 glow plug.

Product Specifications

Manufacturer # 12240
Bore 0.669 in (17 mm)
Crankshaft Threads M7x1
Crankshaft Type Threaded
Cylinders Single
Displacement 0.213 cu in (3.49 cc)
Power Type Glow
HP 1.8 PS, 1.77 HP @ 29,000 rpm
Plug Type LC3
Product Height 4 in (101 mm)
Product Length 2.1 in (53.6 mm) from backplate to drive hub
Product Width 1.5 in (39 mm) at mounting tabs
RPM Range 3,000 - 35,000 rpm
Stroke 0.590 in (15 mm)
Total Weight 8.57 oz (243 g)