Ensure optimal engine cooling and guard against thermal damage with this complete water pump repair kit. Designed for demanding marine environments, this kit replaces worn impellers, fatigued gaskets, and damaged wear plates to maintain proper water pressure across all operating speeds.
Fitment
Fits select 1998 to 2018 Mercury and Mariner 40 HP, 50 HP, and 60 HP 4-stroke outboard models (Standard 3.25" gearcase), including:
- 40 HP 4-Stroke: 3-Cylinder & 4-Cylinder EFI and Carbureted models (1998–2018)
- 50 HP 4-Stroke: 4-Cylinder EFI and Carbureted models (1998–2018)
- 60 HP 4-Stroke: 4-Cylinder EFI models (2001–2018)
Note: Does not fit BigFoot or Command Thrust models utilizing the larger 4.25" gearcase. Water pump housing is not included.
What’s Included
- Neoprene water pump impeller
- Stainless steel wear plate
- Impeller drive key
- Water pump gaskets and face seals
- Water tube grommet and O-rings
Replaces / Cross-References
- Mercury / Quicksilver OEM: 812938A3, 812938A 3, 812938T3
- Sierra Marine: 18-3441
- GLM: 12121
- Mallory Marine: 9-48312
Fitment Caution
Fitment can vary by engine serial number, gearcase size (Standard vs. BigFoot/Command Thrust), and horsepower. Compare your original pump components and OEM cross-reference numbers prior to ordering.
Questions About This Product?
Have a question about this part or need help determining if it may work for your application? Email us at customerservice@marinepartswarehouse.com with your engine model and serial number, and our team will be happy to help with any information we have available.
