I take my hat off to you AVB, takes a lot of determination to go through the process to figure what is going on when all it needed was a new spark plug. Easy in hindsight but because it is running you believe the plug is ok. NGK used to be a top notch plug but their reputation has taken a battering over the last 10 years or so because of the fake NGK plugs and the problem with the fake ones they are very hard to spot and it is only on the packaging that you can spot the fakes. From memory the box color is a shade different and there is something in the writing that is wrong. I stopped using NGK some years ago because of this problem.
