I have a DR self propelled trimmer with a Briggs and Stratton motor. According to instructions, I removed the4 spark plug to put a little oil in the cylinder for the winter. In putting the plug back in, I cross threaded it. I got a thread chaser but it was impossible to turns it properly because of interference from the valve assembly. I think I made the threads worse. Is there anything I can do short of removing the head?
---MIKE---
In the White Mountains of New Hampshire (44=EF=BF=BD 15' N - Elevation 1580')