Engine Parts - Other

Sierra Exhaust Manifold Gasket Set - Mercruiser - S18-4348 For: GM 454, 525 (7.4L & 8.2L) Contains: Sierra CodeDescriptionO.E #Qty S18-0418 Manifold to Cylinder Head Gasket 27-46820 2 S18-0897 Exhaust Elbow Mounting...

Sierra Exhaust Manifold Gasket Set - Mercruiser - S18-4349 For: GM 200, 228, 230, 260, 898 (5.0 & 5.7L) Contains: Sierra CodeDescriptionO.E #Qty S18-2949 Exhaust Manifold Gasket 27-33395 2 S18-0897 Exhaust Elbow Mounting...

Sierra Engine Coupler - Mercruiser - S18-2172. Replaces: 14505A2 Used when replacing V6 or V8 2 piece rear main seal with 3-1/2” crankshaft bolt pattern to a newer 1 piece rear main seal engine with 3” bolt pattern Part...

Sierra Engine Coupler - Mercruiser - S18-2413. Replaces: 69354A1, 69354A2 For: 470, 485 (224 cu. in.) S/N 4208730-6218036 (1976-1982) Part Number SRA-S18-2413

Sierra Head Gasket - Mercruiser - S18-2946. Replaces: 3853336, 908611 Fits: GM 181 (3.0L) CID Eng. Part Number SRA-S18-2946

Sierra Thermostat Kit - Mercruiser -  S18-3647 Replaces: 807252Q5, 807252T8 Contains: Sierra CodeDescriptionO.E # S18-3649 Thermostat 807252-2 S18-2844 Thermostat Cover Gasket 27-48818-1 S18-2552 Thermostat Cover...

Sierra Thermostat Kit - Mercruiser - S18-3668. Replaces: 807252T4, 807252Q4 Contains: Sierra CodeDescriptionO.E # S18-2552 Thermostat Cover Gasket 27-33179-2 S18-2553 Thermostat Cover Gasket 27-47510 S18-2554 Thermostat Cover...

Sierra Thermostat Kit - Mercruiser - S18-3648. 160° Part Number SRA-S18-3648

Sierra Thermostat Kit - Mercruiser - S18-3646. Replaces: 807252Q3, 807252T6 Contains: Sierra CodeDescriptionO.E # S18-3551 Thermostat 59137 S18-2917 Thermostat Housing Gasket 27-53045-1, 27-33918 S18-2844 Thermostat Cover...

Sierra Commutator End Plate - Mercruiser - S18-6254. Replaces: 392-2940 For: Use with Prestolite Pumps (Mercury #’s 79271A4 and 88475A5) Part Number SRA-S18-6254

Sierra Composite Pulley - Mercruiser - S18-6457. Replaces: 807757T 3” OD Serpentine for 13/16” width belt For: Late model GM V6 & V8 engines Part Number SRA-S18-6457

Sierra Thermostat Service Kit - Mercruiser - S18-1989K. Service Kit for S18-1989 Thermostat Housing. Part Number SRA-S18-1989K

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

Sierra Thermostat - Mercruiser - S18-43015. Replaces: Mercury 864493 Fits: Mercruiser MCM 4.3L MPI, 5.0L MPI and MX6.2L w/dry joint exhaust and closed cooling Part Number SRA-S18-43015

Sierra Thermostat - Mercruiser - S18-3551. Replaces: 32728, 35884, 59137, 59137A1, 8072521, 8072531, 807252T1, 8M0089715 142° Part Number SRA-S18-3551

Sierra Thermostat - Mercruiser - S18-3555. Replaces: 99155T1 Part Number SRA-S18-3555

Sierra Thermostat - Mercruiser - S18-3550. Replaces: 59078, 59078A1 140° Part Number SRA-S18-3550

Sierra Manifold - Mercruiser - S18-1956-3. Supplied with Mounting Package Replaces: Mercruiser 860235A04, 99798A3, 99798A9, 99798A16, 99798A18, 806867A8 Marine Power 600333 Barr MC 1 99798 Fits: 2.5 & 3.0L (1983-89) Part...

Sierra Manifold - Mercruiser - S18-1953-2. Port & Starboard. Supplied with Mounting Package Replaces: Mercruiser 87114A19, 86024A10, 860246A15, 860246A3, 860246A7, 860246A9, 860336A2, 860337A2, 87114A19, 87114A30 Marine Power 0994-100, Barr...

Sierra Elbow - Mercruiser - S18-1972. Replaces: 76325A2, 12076A2 Barr MC-20-76325 Fits: Most late Model 120, 140 HP Mercruiser applications Use with: Manifold: S18-1955-1, S18-1954-1, S18-1956-3, S18-1901 Elbow Gasket: S18-2833 Mounting...