Trying to find info on the following outboard motor...
Wizard by Western Auto Supply Co.
The model number is C0C6620A17
The serial number is 10238
It is a 20 hp.
Can anyone advise what year this is and where I would find manuals & parts for it?

You have a Chrysler built Wizard, and it is either a 1971 or 1972 (there is pretty much no difference between the two years). For Parts, I would start here:

http://www.discount-marine-parts.com/ob_chrysler_wizard.html

Good luck!
JP