ORIGINAL: Mpizpilot
ORIGINAL: earlwb
I was curious, did they include the wrong size spark plug in the box with the engine? I would check to see what spark plug fits. They may have stuck the wrong plug into the box when they were boxing up the engine at the factory.
No, typical cm6 sized plug. The threads were just cut too shallow.
That is a major bummer then. If you can't get a helicoil for it or make a insert to re-drill and tap it for the CM-6, I wonder if you could go the next size larger in spark plugs and just drill and tap it for the bigger spark plug. Yeah I know it sucks, I was just thinking of a way for you to try and get it to run.