# is the horsepower of engine
T is Tecumseh
K is Kohler
Year Engine Serial Number
1963 7K 2,551-3,550
1964 8K 3,551-15,000
1965 8K 15,001-40,000
1966 8K 40,001-65,000
1967 8K 65,001-100,000
1968 8K 100,001-130,000
1969 8K 130,001-150,000
1970 8K 160,001-185,000
1971 8K 185,001-250,000
1972 8K 250,001-260,000
1972 10K 260,001-272,000
1973 8K 272,001-285,000
1973 10K 285,001-310,000
1974 8K 310,001-320,000
1974 10K 320,001-?
112 Garden Tractor
Year Engine Serial Number
1966 10T 2,551-3,550
1967 10T 3,551-100,000
1968 10T 100,001-130,000
1969 10T 130,001-150,000
1969 10K 150,001-160,000
1970 10T 160,001-180,000
1970 10K 180,001-225,000
1971 10T 185,001-250,000
1971 10K 225,001-250,000
1972 12K 250,001-260,000
1973 12K 260,001-300,000
1974 12K 300,001-?
Year Engine Serial Number
1970 12K 1,001-7,500
1971 12K 7,501-?
Year Engine Serial Number
1968 12K 1,001-10,000
1969 14K 10,001-22,400
1970 14K 22,401-30,000
1971 14K 30,001-38,000
1972 14K 38,001-46,500
1973 14K 46,501-56,500
1974 14K 56,501-?
Year Engine Serial Number
1966 6T ?,???-8,000
1967 6T 8,001-15,000
1968 6T 15,001-20,000
1969 6T 20,001-25,000
Year Engine Serial Number
1970 7T 25,001-35,000
1971 7T 35,001-45,000
1972 7T 45,001-50,000
1973 7T 50,001-56,000
1974 7T 56,001-65,000