My engine sputters when I turn off the ignition. Using my oh so limited knowledge on engines I figure it's probably a timing issue and since I don't own a timing light I have now given myself an excuse to buy one. So off to Sears I go and I get a light with an advance dial. Tell me if I'm reading this correctly. The silver ball is quite a bit lower than the needle... this is "advance"... at least this is what I’ve learned after liberal use of the search feature on this site. When I turn up the advance knob the ball will rest on the needle at 7. So this is 14 degrees of advance? Can I assume that this is a true reading? In general, what causes sputtering? Too much advance or not enough? As usual... Thanks man.