Has anyone seen a spark plug do this ?
this is the top section where the cap fits onto it- I noticed a small arc hitting the cylinder from the plug cap - switched off had a look moved the cap realising that it was moving a little to much- pulled it a little and the whole inner shaft of the spark plug came free-
thinking the worse - I.e. the plug had disintegrated inside the block I decided to remove the plug- thankfully its intact at the other end-
I didn't notice any drop in power- as I have a 2 plug head so the other plug was still working - though I did notice that I wasn't burning fuel as cleanly, and had an excellent over run burble -
new plug in and I'm running sweet-