I need a belt routing diagram for a scotts riding mower, 42 inch cut,

Go to your dealer and ask for a diagram, or try to find a scotts website.

I have a diagram but am unable to get it posted here. The inside of the belt will go around the 2 blade pullys and go on the inside of the 2 idler pullys(the outside of the belt will be against these) the it goes to the front of the mower and around the jacksheave