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!
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.
0.669 in (17 mm)
three needle slide valve
0.211 cu in (3.46 cc)
Engine (Only) Weight
12.25 oz (347 g)
1.8 PS 1.77 HP @ 35,000 rpm
Oil Type & Content
At least 18% synthetic lubricant
3.3" (85.3mm) crankcase botton to top of cylinder head