How do small petrol engines stop?

[slim reaper]

If its the same as a v twin vanguard then it has an anti run-on valve on the carb which shut fuel to main jet so kills the engine whether there is a coil kill or not.One of the wires may go to to safety interlock which usually prevents the engine from starting though.

What did the engine come off and is the ignition switch on the engine,the equipment the engine came off or the grinder?

Slim