I would have searched this in this forum if I knew what I was searching for, so let me add this after saying that, . . . They say there are no dumb questions, . . . but there just easier to answer ! And after having said that, could you tell me what the who-jigger is that looks like it will fit where the spark plug goes? It came with my engine kit, I can only guess it is some kind of compression tool. It is dark iron, has two sets of threads, one larger than the other and a square nut at the top going down through the interior and is short but about the dia. of a spark plug thread.