hello,i am fixing a yt 3600 and i need to replace the case gasket as it is leaking,anyway..ive got the muffler off and the belt off, i'm assuming that i need to get the pullys off the front of the motor to get the case off, my question is how do i get the nut off first because the shaft turns when i try...even tried cordless impact..wich way does it go?? please help snirt.