This is why we have back-up mowers and lots of extra parts. fist sized chunk of wood was picked up by mower and jammed in blower fan. it took out fan blade (lower right) and possibly bearing. havent got it completely apart, yet, to see why its not turning. took off belt and finished day mulching with it while we used the other one we had with to pick up. i had an extra fan assembly in stock and had it switched in an hour tonight.