The 138190047 Ignition On/Off Kill Switch is commonly used and found on the blower housing of most clone engines. 

The Engine Ignition Kill Switch works by opening the circuit from the coil to the ground wire usually found bolted between the blower housing and the block. This kills the energy made by the coil to ignition the spark plug and stoping the engine combustion. On the Kill Switch is a secondary ground wire to have a remote kill switch attached. This can route a kill switch to the hand control or be used to set up a dead man kill switch. 

The Ignition On/Off Kill Switch fit any of them for 196cc 6.5hp Clone, Honda GX200, Ducar 196, Ducar/Tillotson 212E, Tillotson 196R/RS, Tillotson 212R, Tillotson 225RS, Ducar/Tillotson 212E, Predator 212 and BSP 196 and 212 Engines.