Year/Serial Numbers 316 Onan, 318, 322, 330, 332
# is the horsepower of the engine
On is Onan
GY is gas Yanmar
DY is diesel Yanmar
Year Engine Serial Number
1984 16 On 285,001-315,000
1985 16 On 315,001-360,000
1986 16 On 360,001-420,000
1987 18 On 420,001-475,000
1988 18 On 475,001-595,000
1989 18 On 595,001-999,000
1990 18 On 010,001-100,000
1991 18 On 100,001-110,000
1992 18 On 110,001-120,000
Year Engine Serial Number
1988 18 GY 475,001-595,000
1989 18 GY 595,001-999,000
1990 18 GY 010,001-100,000
1991 18 GY 100,001-110,000
1992 18 GY 110,001-120,000
Year Engine Serial Number
1983 18 On 222,001-285,000
1984 18 On 285,001-315,000
1985 18 On 315,001-360,000
1986 18 On 360,001-420,000
1987 18 On 420,001-475,000
1988 18 On 475,001-595,000
1989 18 On 595,001-999,000
1990 18 On 010,001-100,000
1991 18 On 100,001-110,000
1992 18 On 110,001-120,000
Year Engine Serial Number
1986 16 DY 360,001-420,000
Year Engine Serial Number
1987 16 DY 420,001-475,000
1988 16 DY 475,001-595,000
1989 16 DY 595,001-999,000
1990 16 DY 010,001-100,000
1991 16 DY 100,001-110,000
1992 16 DY 110,001-120,000