8M2003959 Oxygen Sensor for Mercruiser 3.0L 4.3L 4.5L 5.0L 5.7L 6.2L 8.1L 8.2L | JLM Marine family-yamaha-30elry start the engine and confirm

start the engine and confirm a strong

1 x Pump Housing Cover (63D-44312-00-00)

You can also verify by matching the OEM part numbers (3850496

This filter is a direct replacement for a wide range of outboard engines

Remove the wear plate

8M2003959 Oxygen Sensor for Mercruiser 3.0L 4.3L 4.5L 5.0L 5.7L 6.2L 8.1L 8.2L | JLM Marine family-yamaha-30elry start the engine and confirmOxygen Sensor for Mercruiser 3. 0L 4. 3L 4. 5L 5. 0L 5. 7L 6. 2L 8. 1L 8. 2L OEM 8M2003959 This aftermarket oxygen sensor is engineered to replace OEM part number 8M2003959 for a wide range of Mercruiser sterndrive and inboard engines. It delivers reliable exhaust monitoring and fuel management across 3. 0L, 4. 3L, 4. 5L, 5. 0L, 5. 7L, 6. 2L, 8. 1L, and 8. 2L engine families, ensuring accurate air fuel ratio feedback for optimal performance and