As you say, not likely the problem if it is on more than one engine or intake. Kinda hard to pinpoint unless you move the engine a little closer to your computer so I can see it better.
No, all the plugs look good. Havent burned one in 2 seasons. Just on tear downs the #2 main-n-rod bearings show more wear. Doesnt matter right now, he cant afford to race until job gets better.
