This is the O.S. Max .21 TM Engine with the Revo Manifold (also fits Traxxas Slayer). This engine will be a direct drop in for the Traxxas 2.5 and 3.3 Revo or the Slayer Pro, but requires the OS 23818430 Ball Link. The .21 TM will adapt directly to the Traxxas EZ start or pull start systems. The O.S. .21 TM engine is for serious racers and backyard bashers alike that are ready for some major power.

Features

• 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.