Engine: 5X65RU
Serial: 1509173B0648
I think those are the engine numbers, etched on the rear of the engine case.
Machine Model: 25A-262J756
Serial: 1J225P10282
I can't for the life of me find the torque specs for the flywheel. It's a 159cc engine. I've found parts diagrams but can't find engine manual. When I search the model number for the engine, I get MTD results. But nothing comes under that number on their site. The nut was removed with a 3/4" / 19mm socket.
I've been chasing a vibration problem and took the nut off to check the flywheel key.
