Chance, if you are repairing lawn equipment as a business or on the side, I would like to warn you that you are liable for any injures which may occur to the operator of that equipment. I never tell any customer how to disable a safety switch. Before you ask, yes I have disabled safety switches, for diagnosis, but make sure they are working before the unit goes out. The way todays society works I would be very nervous in doing that. If you have a business and you find a unit with a safety switch disconnected, by law you have two choices. Reconnect all safety switches before retiming it to the customer or tell the customer you cannot work on the unit unless he allows you to put things back in proper order. Liability insurance is high enough already, don't want it to go higher. Just wanted you and anyone else who works on equipment to know that even if you do it as a sideline, you can still be held liable.