Re: Help with spark plug that won't come out
I know this won't help you much, for that I appoligize,But because of the engine you are working on if i was close enough to do this for you I would have and garanteed the result. no heli-coil, or rethread of any kind necessary, I have done lots of these over 40 years and never been beat yet, I simply cut them out with an oxy-acetylene torch, clean the threads with a tap, profusely clean the debree out of the cylinder install the new plug with anti-sieze, install the rest of the related parts and carry on doing what ya started to.
Even on a saturday.
I hope you succeed and enjoy your boat