What year is my Mariner 2M 6A1 0619?

The Mariner 2M 6A1 0619 is a model of the Mariner series of outboard motors. Typically, the first two digits of the serial number indicate the year of manufacture. Based on that format, your motor was likely manufactured in 1976. However, for exact confirmation, it is best to consult the manufacturer's documentation or a dealer familiar with Mariner outboards.