Here is one I got in Friday. Craftsman 917.271022
Wiring Diagram https://i.imgur.com/08Cj187.png
Engine spins starter without depressing clutch but will not fire up as long as the operator is off the seat.
Operator on the seat the start the engine without depressing the clutch.
And here is the one the operator brought the mower in for. He got knock off the mower while cutting grass and the mower just on cutting grass until he was able to catch the mower. BTW the seat switch working is working as intended per the diagram.
I can tell it is the results of someone not knowing anything about electrical working on it. One switch was removed. Just a guess what else they did to it which is requiring me to get two new switches.