How I'm having to remove the adapter on the tough cut 230 after hitting a metal pipe, among other issues. Symptom was immediately after hitting metal, mower vibrates harshly. Not leaking oil so shaft seam OK. 0125K09-0266-E1 engine.
After reassembly, we still have vibration. I'm going to conclude the crank was slightly bent after hitting a metal pipe with mower. I may price it out to see if it's worth it compared to a new mower with autostart