I have a Kohler K181 on a 1966 JD 110H lawn tractor. While mowing the other day the RPM's took off and went up real high until I grabbed the throttle and turned it down. After searching on this site,I think I might have spun the governor gear off inside the crank case? I have readjusted the governor lever as per the Kohler shop manual but no change. I can keep the throttle down but then when the engine gets a load the RPM's won't speed up to handle the increased load. Can this gear be serviced without a complete tear down? My Kohler manual has the governor gear as the last item removed from the crankcase and the first part put in when reassembling the engine! . .