Small Engines (Lawn Mowers, etc.): model number codes, model numbers, model number

Question
Are model numbers coded to  tell the year of the equipment?  here are 2
examples: 917.254274 and  316e640f190.
Thank you.

Answer
Hello Jerry:
I am Familiar with the Codes for the Engines. The Model Numbers for the Mowers Do Tell the Year, Date of Manufacture and whom the OEM is. I Will Locate the Information on the Breakdown of the Mower Model Codes and Send you a Follow Up Answer on 8/20/07. Thanks.

Respectfully

John

Hello Again Jerry:

I Misspoke about the Mower Model Numbers. The Serial Numbers Contain the Information about the OEM and Date of Manufacturer. Thanks. Hope this Helps.

Respectfully

John