20" McClane Reel mower oil change.

[gulfjoe]

I was hoping someone out there could help with this because I am becoming very aggravated trying to do something as simple as an oil change on a lawn mower. Can someone please tell me where the drain plug is on the Model mower. I bought it used this time last year and I haven't even used it yet but I asm doing all my maintenance on my equipment and I thought I should do an oil change on this one. I found a manual online for a different yet similar mower but it was not very helpful. The site wont let me upload all of my photos, but it is a 3HP Briggs&Stratton.

http://www.searspartsdirect.com/part...l+mower-manual

here are some pictures.
Any help would greatly appreciated.