As others have indicated, there are a few different possibilities here.
Is there any chance you can shoot and post a photo or two of the problem item? That might help identify the best means of repair.
~1988 Ariens 924050 (ST824) "mama bear"
~1994 Ariens 924084 (ST1032) "papa bear": restored!
Toro PowerCurve 1800 "baby bear"
Be alert! America needs more lerts.