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21TM ABC .21 Engine with Manifold: 2.5 and 3.3 Revo

Item No.
OS Engines - OSMG2082
$374.18
In Stock
Brand Logo
4.5 out of 5 Customer Rating

21TM ABC .21 Engine with Manifold: 2.5 and 3.3 Revo

Item No.
OS Engines - OSMG2082
$374.18
Product $374.18
Add Ons
Estimated Total: $374.18

21TM ABC .21 Engine with Manifold: 2.5 and 3.3 Revo

Item No.
OS Engines - OSMG2082
4.5 out of 5 Customer Rating
Product $374.18
Add Ons
Estimated Total: $374.18
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Product Details

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

Boost the 4WD performance power in your Traxxas® Revo® 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 # 12241
Engine (Only) Weight 12.25 oz (347 g)
Crankshaft Threads M7x1
Displacement 0.211 cu in (3.46 cc)
Oil Type & Content At least 18% synthetic lubricant
Product Length 2.1" (53.6mm) from back plate to front bearing
Product Height 3.3" (85.3mm) crankcase botton to top of cylinder head
RPM Range 3,000 - 35,000 rpm
Bore 0.669 in (17 mm)
Crankshaft Type Threaded
Power Type Glow
Plug Type LC3
Stroke 0.590 in (15 mm)
Cylinders Single
Product Width 1.5" (39mm) at mounting tabs