i have a 2002 nissan 4 stroke that was not running at all. i cleaned out the carberator and now she purrs like a kitten. while i was cleaning it out i saw in the carb a rubber plug next to the jet in the center of the float. I removed the plug and cleaned the inside out. when i sprayed carb cleaner through it i saw fluid come out 5 tiny holes next to the butterfly valve. i was wondering what this is.