Small Engines (Lawn Mowers, etc.): Snapper Rider Model 12 Deck Belt Diagram, snapper rider, thick grass

Question
My Snapper (Rear Rider 13.5 B&S engine) Belt was very worn and slipped off in some thick grass the other day and need a diagram showing how to install the new one. Didn't get to finish back yard and and need answer ASAP.
Anyone have this diagram or tell me step by step how to install the belt around the idlers & pulleys...etc
Thanks
JD
ps. Email me ASAP ..Thanks for your help..Very good site Eric.

Answer
Several of us are currently attending a Stihl conference and will not be back in the office until next week...hence the books are there and I'm not.

Rarely do any of the mechanics use diagrams unless we suspect a wrong belt.

The belt comes off the engine pulley to the deck pulley.  Both of these pulleys are V pulleys and the V part of the belt rides in the V channel.

If you have a flat face idler then the back or flat part rides on the flat pulley.  If you have a V idler pulley then the V part or inside of the belt rides in this part.

It's pretty easy to figure out but if you need the diagram I can see if we have one when I return.

Eric