Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Model number? Both side slow? All that is common to both transmissions is the drive belt and the pulley that drives it on the crankshaft. Is the drive belt tight? Could the crankshaft pulley be slipping on the crankshaft?