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

Item No. OSMG2082
21TM ABC .21 Engine with Manifold: 2.5 and 3.3 Revo
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4.5 out of 5 Customer Rating

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

Item No. OSMG2082
$354.99
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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

Manufacturer # 12241
Bore 0.669 in (17 mm)
Crankshaft Threads M7x1
Crankshaft Type Threaded
Cylinders Single
Displacement 0.211 cu in (3.46 cc)
Engine (Only) Weight 12.25 oz (347 g)
Power Type Glow
HP 1.8 PS 1.77 HP @ 35,000 rpm
Oil Type & Content At least 18% synthetic lubricant
Plug Type LC3
Product Height 3.3" (85.3mm) crankcase botton to top of cylinder head
Product Length 2.1" (53.6mm) from back plate to front bearing
Product Width 1.5" (39mm) at mounting tabs
RPM Range 3,000 - 35,000 rpm
Stroke 0.590 in (15 mm)