Gimbal Bearing Grease Seal – Fits Mercruiser Alpha One Gen 1 & 2, Bravo I, II & III (Replaces 26-88416)
Gimbal Bearing Grease Seal – Fits Mercruiser Alpha One Gen 1 & 2, Bravo I, II & III (Replaces 26-88416) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Gimbal Bearing Grease Seal – Fits Mercruiser Alpha One Gen 1 & ...
Gimbal Bearing Grease Seal – Fits Mercruiser Alpha One Gen 1 & 2, Bravo I, II & III (Replaces 26-88416) is backordered and will ship as soon as it is back in stock.
Product Details
This high-quality Gimbal Bearing Grease Seal is engineered for a precise fit on a wide range of Mercruiser sterndrives, including Alpha One, Alpha One Generation 2, and all Bravo I, II, and III models. It forms a critical barrier, preventing water intrusion and retaining the grease necessary for smooth gimbal bearing operation, ensuring the longevity and reliability of your sterndrive assembly.
It serves as a direct replacement for Mercruiser/Quicksilver part 26-88416, Sierra 18-2094, and GLM 85910, offering an exact interchange for routine maintenance or repairs.
- Designed for direct, hassle-free installation.
- Constructed from durable stainless steel and high-grade Nitrile Butadiene Rubber (NBR).
- Offers outstanding resistance to wear, abrasion, and marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercruiser/Quicksilver | 26-88416 |
| Sierra | 18-2094 |
| GLM | 85910 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure correct fitment.
This part is confirmed to fit the following Mercruiser sterndrive models.
| Brand | Model | Stroke | Years | OEM Part No. |
|---|---|---|---|---|
| Mercruiser | R Sterndrive | 4-Stroke | 26-88416 | |
| Mercruiser | MR Sterndrive | 4-Stroke | 26-88416 | |
| Mercruiser | Alpha One | 4-Stroke | 26-88416 | |
| Mercruiser | Alpha One Gen II | 4-Stroke | 1991–Present | 26-88416 |
| Mercruiser | Bravo I | 4-Stroke | 26-88416 | |
| Mercruiser | Bravo II | 4-Stroke | 26-88416 | |
| Mercruiser | Bravo III | 4-Stroke | 26-88416 |
Technical Specs
- Product Type
- Gimbal Bearing Grease Seal
- Installation
- Direct replacement
- Housing Material
- Stainless Steel with NBR (Nitrile Butadiene Rubber)
- Dimensions
- 4.13 × 0.2 × 0.39 inches (104.9 × 5.1 × 9.9 mm)
- Weight
- 0.05 kg (0.11 lb)
- Other Technical Attributes
- High quality NBR material and stainless steel for outstanding wear & abrasion resistance
What’s in the Box
- 1 × Gimbal Bearing Grease Seal (26-88416)
Installation Notes
- Ensure the engine is off and the battery is disconnected before starting.
- Following the manufacturer's service manual, remove the sterndrive unit to access the gimbal housing.
- Carefully extract the old gimbal bearing and the worn grease seal using an appropriate puller tool.
- Thoroughly clean the seal's seating surface inside the gimbal housing, removing any old sealant or corrosion.
- Align the new grease seal and use a suitable seal driver to tap it evenly into place until it is fully seated.
- Install the new gimbal bearing and any related components.
- Reinstall the sterndrive unit, ensuring all connections and bellows are secure.
- Reconnect the battery and check for leaks and proper operation once the boat is in the water.
Troubleshooting & FAQ
How do I know if my gimbal bearing grease seal is failing?
Signs of a failing seal include water inside the drive bellows, a grinding or rumbling noise from the transom area during operation, or evidence of excessive grease leaking from the gimbal housing.
Is this seal compatible with all Alpha One models?
Yes, it is compatible with both the original Mercruiser Alpha One and the Alpha One Generation 2 sterndrives.
When should this seal be replaced?
It is best practice to replace the gimbal bearing grease seal anytime you are replacing the gimbal bearing, U-joints, or drive bellows to ensure a complete and lasting repair.
What makes this seal different from the OEM part?
This aftermarket seal is manufactured to meet or exceed OEM specifications using high-quality stainless steel and NBR rubber for durability and reliable performance in marine environments.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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