you may need to disconnect the exhaust bellows to access the inside of the Y-pipe
Cross-reference your original part number (17400-87810) with the specifications provided
such as the intake manifold or airbox
Reinstall the water pump housing
How often should I replace it
Water Pump Impeller Kit – Fits Mercury/Mariner 2-Stroke 3.9HP-9.8HP (Replaces 47-89981Q1, 47-89981T1) family-yamaha-f300nca you may need to disconnectWater Pump Impeller Kit Fits Mercury Mariner 2 Stroke 3. 9HP 9. 8HP (Replaces 47 89981Q1, 47 89981T1) This kit is designed for Mercury Mariner 2 Stroke outboard engines, including 3. 9HP, 4HP, 4. 5HP, 6HP, 7. 5HP, and 9. 8HP models, primarily from the 1970s and 1980s. It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring wide compatibility for a complete water pump repair or rebuild. Direct replacement installation.