yesterday my ofna chrome top was fine, today i try to turn my engine over after putting some after run oil in it, and the starter box is now acting strange. it seems like the starter wheel is slipping on the shaft. when i press down to turn the starter box motor on, the shaft will spin, but the rubber wheel will spin slowly till it finally catches up to speed with the shaft. when i try to turn the engine over on it, the flywheel will stop the rubber wheel and the shaft will keep going. what is wrong? i made sure the nut on the front of the starter box motor was tight, but when i try to tighten it, it just turns the whole shaft and doesn't tighten up anymore. do i need a new starter box motor? i havent even had this box for a month.