42431M Water Pump kit Mercury 20C (THRU PROP. EXHAUST) 1981-1981 20 6A9-000101 THRU 010111 20C (THRU PROP. EXHAUST) 1981-1981 20 6A9-250101 THRU 250819 20C (THRU PROP. EXHAUST) 1981-1981 20 6A9-300101 THRU 306542 20C (THRU PROP. EXHAUST) 1981-1981 20 6A9-550101 THRU 550693 25C (THRU PROP. EXHAUST) 1980-1980 25 695-000101 THRU 023895 25C (THRU PROP. EXHAUST) 1980-1980 25 695-250101 THRU 253861 25C (THRU PROP. EXHAUST) 1980-1980 25 695-300101 THRU 318173 25C (THRU PROP. EXHAUST) 1980-1980 25 695-550101 THRU 555959 30A 1977-1977 30 689-000366 THRU 022058 30A 1980-1980 30 689-000366 THRU 022058 30A 1977-1977 30 689-100251 THRU 105324 30A 1980-1980 30 689-100251 THRU 105324 30A 1977-1977 30 689-301911 THRU 321376 30A 1980-1980 30 689-301911 THRU 321376 30A 1977-1977 30 689-401216 THRU 411946 30A 1980-1980 30 689-401216 THRU 411946