Yamaha Model Years are usually indicated by a lower case letter in the black field in the lower left or right corner of the model plate. This plate is located on the side of the transom bracket.
Note that the letters have been reused throughout the years.
| 1980 - S | 1990 - D | 2000 - T | |
| 1981 - R | 1991 - C | 2001 - S | |
| 1982 - Q | 1992 - B | 2002 - R | |
| 1973 - Z | 1983 - P | 1993 - A | 2003 - Q |
| 1974 - Y | 1984 - N | 1994 - Z | 2004 - P |
| 1975 - X | 1985 - K | 1995 - Y | 2005 - N |
| 1976 - W | 1986 - J | 1996 - X | |
| 1977 - V | 1987 - H | 1997 - W | |
| 1978 - U | 1988 - G | 1998 - V | |
| 1979 - T | 1989 - F |
1999 - U |
|