Hi every one
I have a very old mtd riding lawn mower that my mother gave me but it keeps throwing the drive belt. My mother thinks that the way she was putting the belt on is wrong does any one know how the belt should go on its about a 1986 model mower.

Make sure the belt keepers are in place... usually drive belts and deck belts jump around a little when mowing, etc... and the keepers, well keep them in place.

The belt also may be stretched or worn out. If it is stretched then they have a tendency to dance out of place

These belts Don't stretch much or at all... (the way they are made) but rather the way they are made... they are made to fit in the groove on the pulley.. repeated engaging and disengaging wears that down...