The safety switch looks easy to replace . If you look under the cargo bed about 6" from the back of the engine , you will see the shift mechanism . It looks like a can of biscuits - sort of anyway. It has an electrical line with a quick disconnect there. Mine is white. Just under the rubber coiled gear changer arm ,and coming from that plug in you will see what looks sort of like a spark plug that screws into the "can of biscuits" .This is the safety switch. It looks easy to change out to me . The part number appears to be K7561-6221-0. It has a gasket which is K7561-1341-0. Check with the parts guy, but I think these are the right numbers. I order my stuff from Messick's Equipment. They are on here a good bit and good folks. Good Luck, Bordercollie