Small Engines (Lawn Mowers, etc.): Replace drive belt on Toro 521 snow throwerr, serial number tag, toro 521

Question
How do I replace the drive belt on my old Toro 521 2 stage snow thrower, probably around 1986?

Answer
 Hello Tom:

 The Actual Model Numbers will Be Similar to this Number; 5210A, 5213, ect. You can go to this Addy and It will Give Directions on where the Model and Serial Number Tag is Located. Send me the Model and Serial Numbers, Please. With these I May be Able to Locate the Proper Breakdown and Assist you Better. There are Many Different Models and there are Many Different Procedures for Changing the Drive Belt Depending on the Model and Serial Numbers. I can Also use the Breakdown for Reference when Talking about the Belt Replacement. If you Havent done so yet. I Suggest you Spray all the Nuts, Bolts and Fittings with PB Rust Catalyst. This will Soak Into the Rust and Make the Disassembly Easier. Thanks.

 Respectfully

 John