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

Item No.
OS Engines - OSMG2082
$374.18
21TM ABC .21 Engine with Manifold: 2.5 and 3.3 Revo
Backorder | Back Order
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

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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

Engine (Only) Weight 12.25 oz (347 g)
Crankshaft Threads M7x1
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
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