Why is this dang motor so hard to start cold?? Timing is good, no vacuum leaks, anf it fires right up after it is warmed up. Does the fuel drain out the bowl when t cools down? Is my coil weak? Is it just a BB problem. I mean excessive cranking for almost 30 seconds...normally 3-5 non hit cranks for 5 to 7 seconds, then a few near hits then dies....then it lopes, catches, and finally idles. I just changed both fuel filters and tuned the carb....any ideas?