Protect your lower unit against damaging water ingress and keep vital gear lubricants sealed inside with this comprehensive lower unit gearcase seal kit. Precision-engineered from durable, marine-grade elastomers and synthetic rubber compounds, this seal package replaces aged, leaking seals to ensure long-term gearcase protection and optimal performance on the water.
Fitment
Fits select 1998 to 2018 Mercury and Mariner 40 HP, 50 HP, and 60 HP 4-stroke outboard models equipped with standard 3.25" gearcases, 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: Fits standard 3.25" lower units. Does not fit BigFoot or Command Thrust models with larger 4.25" gearcases.
What’s Included
- Drive shaft oil seals
- Propeller shaft oil seals
- Shift shaft oil seal / O-rings
- Gearcase drain and fill plug washers
- Bearing carrier O-rings and housing seals
Replaces / Cross-References
- Mercury / Quicksilver OEM: 26-814669A2, 26-814669A 2, 814669A2, 814669A 2
- Sierra Marine: 18-2615
- GLM: 87520
- Mallory Marine: 9-74210
Fitment Caution
Fitment can vary by engine serial number, gearcase size (Standard vs. BigFoot/Command Thrust), and year. Compare your original seals 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.
