1969-1979 The actual year is found in the model number, not the serial number. Commercial If you have a commercial model refer to the Johnson commercial serial number year chart located here.
Evinrude changed how they indicate year in the model number in 1980.
Unfortunately, the process for determining the manufacture date for older engines is not the same since the tracking system with the Code Number was not implemented until 1965.
A great source for older and antique Briggs & Stratton engines can be found through other websites.
Depending on the whether your engine is from before or after that year determins how you will find your Evinrude engine year information.
1980-Present Engines since 1980 use a two letter code at the end of the model number based on the following key : For example the 'ED' at the end of VE70TLED indicate that the engine is from '96'.
Commercial If you have a commercial model refer to the Evinrude commercial serial number year chart located here.
For example, in SX150TLRY1 the 'Y' tells you the model year is 2000.
If your are still unsure of your engine year, search for your model number on the Evinrude 1980-later serial number year chart located here.Pre 1980 For engines prior to 1980 refer the the Evinrude 1950-1979 serial number year chart located here.