I thought that changing belts was more or less self-explanatory, but i guess not.
Only problem i have had on some Murrays and others of that ilk, is this:
Those models, where the crank-shaft goes down thru the frame, had tabs bent down around the belt where it goes around the crank-shaft. Those tabs acted as belt keepers.' If that is the case, then you must loosen the engine mounting bolts, or even remove them so you can slide the engine around, and, or lift it up to get the belt off, and new one back on. The stacked pulley will most likely need to be removed also. HTH: Rusty J.

Click link below for a recent story with a happy ending.

Here is a link that might be useful: A can of belt magic

Hey, Mownie: Didn't those types have a stacked pulley on the crankshaft? I haven't worked on that make for years, so i must have forgot. Rusty

This one (13AU609H131) has an electric PTO clutch, so no stack pulley.