My 20+ year old Craftsman garden tractor is having a problem. It has a 20 Horse Kohler. I got tired of buying fuel pumps for it so I Put an electric fuel pump on it. Now at least it will start and it seemed to have plenty of power. Next day it didn’t. I pulled the carb off to clean it but i’m not confident that’s all that is wrong. I don’t have a wiring diagram. Besides the seat and blade control what energizes the solenoid on the carb? Does it stop fuel when energized or when it’s not energized, it does work.