I'm working on a 6hp evinrude that I believe is a 1987 model. It has a "primer or squirter" in place of a regular choke action as near as I can tell. This pull knob is external. A couple of questions: What's the significance of the markings that are on the cover related to this "primer'? It seems to run better with the knob fully pulled out. Doesn't seem to me that should be right. Also: On the tiller handle is a kill button. Right behind that you can turn a knob. Is this adjusting anything? Also do you need to remove the starter coil to remove the carberator? I haven't picked up a owners of service manual yet so any help will be appreciated and thanks in advance.