Hi, I recently picked up a Sears Gt16. The model number is 502.257043. I've talked to my local Sears store and searched long and hard on the internet, yet I still couldn't find a owners manual. It has a Briggs and Stratton 2 cyl. , 16hp vertical drive motor with a 4spd. gearbox with reverse. Also, it has a disc brake. If anyone has any advice, parts, or a manual; your feedback would be greatly appreciated.