Hi Ed
Got the same thing on my '01 Skorp. I have left it alone. I only had one ocassion that I noticed it do anything. I was putting it up for the winter. Had just drained the tank and removed the float bowl drain screw, drained the carb and replaced the screw. Then for some reason I turned the ingition on, maybe to check lights or something. Anyway as I turned on the ignition that little bugger made a little humming noise for a second or two and spit a small amount of fuel all over by basement floor. I"m guessing it is some type of priming pump? I have seen some Skorps with carbon canisters. Mine has the remnents of what may have been an installed cannister. What ever you do don't take my word for it. By the way it never did it again even when I tried to duplicate the occurance. I'll wager someone has the definative answer.