Thanks to Wolfman for the link. I saved $40 for the fuel shut off solenoid, which is a real Kubota part, made in Japan. It arrived within 5 days. I installed it on the tractor today. It made a solid loud click when key turned to ON - like a heavy weight punch vs the light weight punch of the old solenoid. It works so far and I will report back if there is problem. I cut off the rod of the old one just in case I need a manual start. Many thanks to the experience and knowledge of the people on this forum.