• Adapts perfectly to the Traxxas E-Z Start or pull-start systems with no modifications
• Included manifold is specially designed to fit directly onto the Revo
• Traxxas' clutch assembly bolts right to the crankshaft with no modifications
• Oversized cooling fins on crankcase helps to keep engine cooler
• Three needle slide valve carburetor with fins to help cool the fuel as it enters the engine
• High-performance long reach O.S. LC3 glow plug suitable for off-road applications that require constantly varying speed

Specifications:
Displacement: 0.21 cu in (3.4cc)
Bore: 0.669" (17mm)
Stroke: 0.590" (15mm)
Practical RPM: 3,000 - 35,000 RPM
Output: 1.8 ps / 29,000 RPM
Weight: 8.57oz (243g)

NOTE: This engine requires the OS 23818430 Ball Link to be compatible with the Traxxas 2.5 and 3.3 Revo or the Slayer Pro.

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.

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