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.
Manufacturer #12241Displacement0.211 cu in (3.46 cc)Oil Type & ContentAt least 18% synthetic lubricantProduct Length2.1″ (53.6mm) from back plate to front bearingEngine (Only) Weight12.25 oz (347 g)RPM Range3,000 – 35,000 rpmBore0.669 in (17 mm)Crankshaft TypeThreadedPower TypeGlowPlug TypeLC3Stroke0.590 in (15 mm)Product Height3.3″ (85.3mm) crankcase botton to top of cylinder headCrankshaft ThreadsM7x1CylindersSingleProduct Width1.5″ (39mm) at mounting tabs