No serial number. What year and model?

[Bobwill]

Just purchased this mower for parents. Serial number missing. How do I find year and model. Bought at est 13.5 hp Briggs Stratton.hydro. 30 inch? Can't add pic because the file to large?

 

[Rivets]

Post all engine numbers, with them we can get close to age.

 

[Bobwill]

Motor# 090616za03897. 21b807. 0326. 81. I have pic loaded to this site in photo section if it helps. I have no idea how to attach.

 

[Rivets]

If I’m reading that number correctly the engine was built in 2009. Please double check for me. Look on the valve cover or shroud for stamped numbers. There should be three separate numbers, a model (6 digits), type (4 digits-2 digits) and code (6 to 8 digits). The first two digits of the code will be the year the engine was manufactured.