From inside (document excerpt):
Lawn Mower 22, Recycler) Form No. 3352-571 Model No. 20049–Serial No. 250000001 and Up Operator’s Manual Introduction Read this manual carefully to learn how to operate and maintain your product properly and to avoid injury and product damage. You are responsible for operating the product properly and safely. You may contact Toro directly at www.Toro.com for product and accessory information, help finding a dealer, or to register your product. Whenever you need service, genuine Toro parts, or additional information, contact an Authorized Service Dealer or Toro Customer Service and have the model and serial numbers of your product ready.
The illustration below identifies the location of the model and serial numbers on the product. Write the numbers in the space provided below: Model #: Serial #: m-5607 Important: This engine is not equipped with a spark arrester muffler. It is a violation of California Public Resource Code Section 4442 to use or operate this engine on any forest-covered, brush-covered or grass-covered land. Other states or federal areas may have similar laws. This spark ignition system complies with Canadian ICES-002. The enclosed Engine Owner’s Manual is supplied for information regarding The U.S. Environmental Protection Agency (EPA) and the California Emission Control Regulation of emission systems, maintenance and warranty. Replacements may be ordered through the engine manufacturer. Safety This lawn mower meets or exceeds the CPSC blade safety requirements for walk-behind rotary lawn mowers and the B71.1 specifications of the American National Standards Institute in effect at the time of production. Read and understand the contents of this manual before the engine is ever started. This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. Improperly using or maintaining this mower could result in injury or death. To reduce this potential, comply with the following safety instructions. The following instructions have been adapted from the ANSI/OPEI standard B71.1–2003.