I was cutting the grass with my murray riding mower with the B&S 15
hp engine and doing real good. I was in third gear when I hit an old
tree stump hard . The mower stopped and now will not move and the blades
will not turn. The engine runs fine but the pulleys for the motion belt
and the blade belt do not turn. Could this be a
broken shear pin? If so how do I fix it? What else could it be?
Thanks for any advice