Full cranks are dead easy to fit the kill switch, I use a round one that fits in the existing hole in the steel cover above the carby and the earth wire from the switch I just put on the steel cover with a pop rivet. It is good when they start so easily and come back to idle and not revving the guts out of it and a nice tickover at idle when you go to empty the catcher. The G4 cam is a bit of a pain because of it not having the kill switch ramp. One thing you have to be careful of is to not pull back on the throttle too hard because you can pull the cable out of the cam and this splits the cam.I am putting a stop in the air filter housing to stop this happening.The six mowers I got a couple of days ago all rev way too high so I have to modify all of those to get good throttle control