- Year of Mfg - _Third & Fourth_ Number - `01` = 2001
- Plant Code - _Fifth & Sixth_ Numbers - `23`
- Serial Number - _Seventh through Eleventh_ Numbers - `401`
Honda Engines
- Year of Mfg - _Third & Fourth_ Numbers - `06` = 2006
- Spec/Model Code - _Fifth & Sixth_ Numbers - `55`
- Spec Number - _Seventh & Eighth_ Numbers - `00`
- Serial Number - _Ninth through Fifteenth_ Numbers
Kohler Company
- 1989 and older - _Third_ Number - `K` = 1988, `J` = 1987
- 1990 and after - _Third & Fourth_ Numbers - `10` = 1990 - `19` = 1999, `20` = 2000, etc.
- Plant Code - _Fifth & Sixth_ Numbers - `10`
- Serial Number - _Seventh through Fifteenth_ Numbers
Kawasaki
- Year of Mfg - _Second & Third_ Numbers - `07` = 2007
- Spec/Model Code - _Fourth & Fifth_ Numbers - `43`
- Month of Mfg - _Sixth & Seventh_ Numbers - `10` = October
- Serial Number - _Eighth through Fifteenth_ Numbers
