Sullivan Products TigerDrive Clutch Version, 6mm Rear Output Shaft

TigerDrive™This unit replaces the recoil starter or onboard starter found on many R/C Cars, trucks, boat and helicopters, and permits use of a standard hand-held starter. This eliminates broken ropes and burned out onboard starters, and allows the engine to be turned faster for easier starting. The drive direction can be oriented in four directions to accommodate exhaust and chassis arrangement.

There are models to fit most engines from .12 to .46, and installation is very easy -- only three or four screws. The gears are steel, the frame is aluminum and the bearings are bronze and Steel Roller for durability