Carburetor Gasket Kit used on some 20, 45, & 50 HP models.

Carburetor Float Assembly fits 7.5 HP 1973-85, 9.8 HP 1973-85, 20 HP 1973-80, 45 HP 1986-89, and 50HP 1976 -85.

Carburetor Rebuild Kit from Mercury fits 20HP models 1973 thru 1980, and 4-cyl. 50HP 1976 thru 1981.