Hi Jaffa, I have done all the normal things like swapping coils, compression gauge is a good one. Can't believe this thing, I had 2 spark plugs that tested fine, after half stripping this motor I decided (mainly because I had run out of ideas) to put it back together, put in a third plug and it fired straight up. Sometimes the simple things will trip you up. One problem is these plugs are most likely made in China to Chinese standards
