Sierra Drain Plug - Mercruiser. Replaces: 10-79953A2, 10-79953, 10-79953Q04, 10-28634, 10-28634A1, 10-20259, 816610A1, 816610A2, F40109, 10-F50109 For: #1/R/MR/Alpha/Alpha I Gen II Both Upper And...

Sierra Drain Elbow Assembly - Mercruiser - S18-4224. Replaces: 22-806926A1, 22-862210A01 3/4” NPT Part Number SRA-S18-4224

Sierra Alternator - Mercruiser - S18-5945. (3-Wire) (No Core) (68 AMP), SAE J1171 Replaces Mando, Motorola and original equipment Delco. Uses same electrical connections and mounting method...

Sierra Thermostat - Mercruiser - S18-3649. Replaces: 8072522, 807252T2, 8052732, 8M0091470 160° Part Number SRA-S18-3649

Sierra Starter - Mercruiser - S18-5907 (Heavy-Duty) (No Core) (Clockwise) (9 tooth) Top mount rear entry starter for opposite rotation GM & Ford engines. Will also replace bottom mount standard...

Sierra Starter - Mercruiser - S18-5908 (Heavy-Duty) (No Core) (Counter-Clockwise) (9 tooth) Top mount rear entry starter for standard rotation GM & Ford engines. Front mount reverse rotation...

Sierra Elbow - Mercruiser - S18-1973. Replaces: 39920, 39920A1, 55538A2 Barr MC-20-55538 Fits: Most early Model 120 HP Mercruiser applications Part...

Sierra Elbow - Mercruiser - S18-1978 Replaces: 76771A3, A2, 60427A2, 53779A2, 53779A1 Barr MC-20-76771 V-8 Inboard Applications Only Use with: Manifold: S18-1950-1, S18-1951-1, S18-1958-1,...

Sierra Alternator - Mercruiser - S18-5966. Replaces: 817119A4, 12449A1, 98555A1, 92497, 817119A1, 12449A1, 12449 SAE J1171 Part Number SRA-S18-5966