The serial number contains a letter denoting year followed by two numbers denoting month. See table. You can also look at the stamped aluminum manufacturer’s plate on the engine casting itself for the year of manufacture.
| 1999 | A |
|---|---|
| 2000 | B |
| 2001 | C |
| 2002 | D |
| 2003 | E |
| 2004 | F |
| 2005 | G |
| 2006 | H |
| 2007 | I |
| 2008 | J |
| 2009 | K |
| 2010 | L |
| 2011 | M |
| 2012 | N |
| 2013 | O |
| 2014 | P |
| 2015 | Q |
| 2016 | R |
| 2017 | S |
| 2018 | T |
| 2019 | U |
| 2020 | V |
| 2021 | W |
| 2022 | X |
| 2023 | Y |
| 2024 | Z |