Skip Navigation Website Accessibility
 


.21 TM Engine w/ Revo/Slayer Manifold

O.S. .21 TM Monster Truck Engine with Revo/Slayer Manifold

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)


Needle Settings:
- High Speed Needle (Needle Valve) 2-12 turns out from close.
To break-in close approximately 30 after running one tank
of fuel through vehicle, repeat five times
- Mid Range Needle (Mixture Control Valve) Screw head is exactly
12 turn in from flush with the carb body
- Low Speed Needle (Metering Needle) Turn 30 clockwise to lean
mixture or counter-clockwise to richen mixture