Bi-Directional Water Pump – Fits Volvo Penta & MerCruiser 4.3L-6.3L Inboard Engines family-yamaha-6mshq Replace the O-rings (91301-ZW4-003): Inspect

Replace the O-rings (91301-ZW4-003): Inspect all relevant sealing points and replace worn or compressed O-rings

Start the engine and check for fuel leaks around the filter connections

Q: What causes a fuel line connector to fail

engine hesitation or sputtering (especially at high speeds)

Q: When should I replace the lower gear casing mounting nut

Bi-Directional Water Pump – Fits Volvo Penta & MerCruiser 4.3L-6.3L Inboard Engines family-yamaha-6mshq Replace the O-rings (91301-ZW4-003): InspectBi Directional Water Pump Fits Volvo Penta & MerCruiser 4. 3L 6. 3L Inboard Engines (Replaces 850399002, 3853850) This bi directional water pump is a direct replacement for circulation pumps on a wide range of Volvo Penta and MerCruiser inboard and sterndrive engines, including 4. 3L, 5. 0L, 5. 7L, 6. 2L, and 6. 3L models. It is engineered to meet or exceed original equipment specifications for reliable cooling performance. This part directly replaces