Reseal your lower unit and guard against costly gearcase damage with this complete lower unit gearcase seal kit. Engineered from marine-grade oil-resistant elastomers, this comprehensive seal kit prevents water intrusion and ensures maximum gear oil retention under high-load operating conditions.
Fitment
Fits select 1998 to 2018 Mercury and Mariner 40 HP, 50 HP, and 60 HP 4-stroke outboard models equipped with the larger 4.25" BigFoot or Command Thrust gearcase, including:
- 40 HP 4-Stroke BigFoot / Command Thrust: 3-Cylinder & 4-Cylinder EFI and Carbureted models (1998–2018)
- 50 HP 4-Stroke BigFoot / Command Thrust: 4-Cylinder EFI and Carbureted models (1998–2018)
- 60 HP 4-Stroke BigFoot / Command Thrust: 4-Cylinder EFI models (2001–2018)
Note: Fits larger 4.25" gearcases. Does not fit standard 3.25" gearcase models.
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: 26-89238A2, 26-89238A 2, 89238A2, 89238A 2
- Sierra Marine: 18-2614
- GLM: 87510
- Mallory Marine: 9-74211
Fitment Caution
Fitment can vary by engine serial number, gearcase size (BigFoot/Command Thrust 4.25" vs. Standard 3.25"), 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.
