Hi everyone. I've install my new to me blower on my new to me st16 and I cant seem to find info online concerning the proper set up. When I lift the blower, the belt loosens and falls off. It tightens when I lower it. I've adjusted the mount brackets all the way to provide the proper radius and it doesnt help. Maybe I have the wrong bracket for this application. Its a 1974 st16 with a sears blower that has a gear box on the right front corner. I'll post model numbers later. Any opinions? Maybe that's the way they are?