Gimbal Bearing Oil Seal – Fits Mercruiser Alpha One & Bravo Sterndrives (Replaces 26-88416)
Gimbal Bearing Oil Seal – Fits Mercruiser Alpha One & Bravo Sterndrives (Replaces 26-88416) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Gimbal Bearing Oil Seal – Fits Mercruiser Alpha One & Bravo Ste...
Product Details
This is a high-quality Gimbal Bearing Oil Seal – Fits Mercruiser Alpha One & Bravo Sterndrives (Replaces 26-88416) for a wide range of Mercruiser stern drives. It is compatible with R, MR, Alpha One (Gen I & II), and Bravo (I, II, & III) series from 1978 to current models, ensuring broad application for maintenance and repair.
This part provides a direct interchange for Mercury/Mercruiser 26-88416 and 26-36143, Sierra 18-2094, GLM 85910, and Mallory 9-76230.
- Engineered as a direct OEM-quality replacement for a perfect fit.
- Constructed from a stainless steel housing with a high-grade Nitrile (NBR) rubber seal for superior durability and resistance to wear.
- The kit includes one oil seal, providing the essential component for the replacement job.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/Mercruiser | 26-88416 |
| Mercury/Mercruiser | 26-36143 |
| Sierra | 18-2094 |
| GLM | 85910 |
| Mallory | 9-76230 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This seal fits a wide variety of Mercruiser Sterndrive models, including Alpha, Bravo, R/MR, and Blackhawk series. Check your serial number against the notes to ensure precise fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercruiser | Alpha One (Gen I) | Various | 4-Stroke | 1983–1990 | 26-88416 | Sterndrive Serial 6225577-0F386995 |
| Mercruiser | Alpha One (Gen II) | Various | 4-Stroke | 1991–1995 | 26-88416 | Serials 0D469859-0F679999 |
| Mercruiser | Alpha One (Gen II) | Various | 4-Stroke | 1996–1997 | 26-88416 | Serials 0F680000-0K999999 |
| Mercruiser | Alpha One (Gen II) | Various | 4-Stroke | 1998–Current | 26-88416 | Serial 0L100040 & Up |
| Mercruiser | R/MR Models | Various | 4-Stroke | 1983–1990 | 26-88416 | Sterndrive Serial 6225577-0F386995 |
| Mercruiser | R/MR Models | Various | 4-Stroke | 1983–1990 | 26-88416 | Transom Assembly Serial 6216687-0F386995 |
| Mercruiser | Blackhawk | Various | 4-Stroke | 1994–1995 | 26-88416 | All serial numbers |
| Mercruiser | Bravo (all) | Various | 4-Stroke | Various | 26-88416 | Serial 0B664190-0F729999 |
| Mercruiser | Bravo Sterndrives | Various | 4-Stroke | Various | 26-88416 | Serial 0F730000-0M100000 |
| Mercruiser | Bravo One | Various | 4-Stroke | Various | 26-88416 | Serial 0M100001-0W249999 |
| Mercruiser | Bravo One | Various | 4-Stroke | Current | 26-88416 | Serial 0W250000 & Up |
| Mercruiser | Bravo Two | Various | 4-Stroke | Various | 26-88416 | Serial 0B664190-0F729999 |
| Mercruiser | Bravo Two | Various | 4-Stroke | Various | 26-88416 | Serial 0F730000-0M100000 |
| Mercruiser | Bravo Two | Various | 4-Stroke | Various | 26-88416 | Serial 0M100001-0W249999 |
| Mercruiser | Bravo Two | Various | 4-Stroke | Current | 26-88416 | Serial 0W250000 & Up |
| Mercruiser | Bravo Three | Various | 4-Stroke | Various | 26-88416 | Serial 0B664190-0F729999 |
| Mercruiser | Bravo Three | Various | 4-Stroke | Various | 26-88416 | Serial 0F730000-0M100000 |
| Mercruiser | Bravo Three | Various | 4-Stroke | Various | 26-88416 | Serial 0M100001-0W249999 |
| Mercruiser | Bravo Three | Various | 4-Stroke | Current | 26-88416 | Serial 0W250000 & Up |
| Mercruiser | Bravo X One | Various | 4-Stroke | Various | 26-88416 | Serial 0M100001-0W249999 |
| Mercruiser | Bravo X One | Various | 4-Stroke | Current | 26-88416 | Serial 0W250000 & Up |
| Mercruiser | Bravo X Three | Various | 4-Stroke | Various | 26-88416 | Serial 0M100001-0W249999 |
| Mercruiser | Bravo X Three | Various | 4-Stroke | Current | 26-88416 | Serial 0W250000 & Up |
| Mercruiser | Bravo X Two | Various | 4-Stroke | Various | 26-88416 | Serial 0M100001-0W249999 |
| Mercruiser | Bravo X Two | Various | 4-Stroke | Current | 26-88416 | Serial 0W250000 & Up |
| Mercruiser | Bravo XR One | Various | 4-Stroke | Various | 26-88416 | Serial 0L914990-0W239999 |
| Mercruiser | Bravo XR One | Various | 4-Stroke | Current | 26-88416 | Serial 0W240000 & Up |
| Mercruiser | Bravo XR Three | Various | 4-Stroke | Current | 26-88416 | Serial 0W240000 & Up |
| Mercruiser | Bravo XZ One | Various | 4-Stroke | Various | 26-88416 | Serial 0L914990-0M999999 |
| Mercruiser | Bravo XR Sportmaster | Various | 4-Stroke | Various | 26-88416 | Serial 0M052945-0M906877 |
| Mercruiser | Bravo XR Sportmaster | Various | 4-Stroke | Current | 26-88416 | Serial 0M906878 & Up |
| Mercruiser | HI Performance Transom | Various | 4-Stroke | Current | 26-88416 | Serial 0W150003 & Up |
| Mercruiser | Integrated Transom | Various | 4-Stroke | Various | 26-88416 | All through 0M052767 |
| Mercruiser | Integrated Transom | Various | 4-Stroke | Current | 26-88416 | Serial 0M052768 & Up |
| Mercruiser | 120/140 | 120/140 | 4-Stroke | 1978–1982 | 26-88416 | Serial 4893635-6225576 |
| Mercruiser | 165 | 165 | 4-Stroke | 1978–1981 | 26-88416 | Serial 4890460 & Up |
| Mercruiser | 228 | 228 | 4-Stroke | 1978–1982 | 26-88416 | Serial 4898730-6225576 |
| Mercruiser | 260 | 260 | 4-Stroke | 1978–1982 | 26-88416 | Serial 4898730-6225576 |
| Mercruiser | 470 | 470 | 4-Stroke | 1978–1982 | 26-88416 | Serial 4893835-6225576 |
| Mercruiser | 485 | 485 | 4-Stroke | 1980–1982 | 26-88416 | Serial 4893835 & Up |
| Mercruiser | 898 | 898 | 4-Stroke | 1978–1982 | 26-88416 | Serial 4898730-6225576 |
Technical Specs
- Product Type
- Gimbal Bearing Oil Seal
- Installation
- Direct OEM replacement
- Housing Material
- Stainless Steel with Nitrile (NBR) Rubber Seal
- Other Technical Attributes
- High-grade NBR material for superior wear and abrasion resistance
- Warranty
- 1 Year (OEM manufacturer dependent)
What’s in the Box
- 1 x Gimbal Bearing Oil Seal (26-88416)
Installation Notes
- Disconnect the battery and ensure the engine is off and cool.
- Remove the sterndrive unit from the transom assembly according to the manufacturer's service manual.
- Locate and access the gimbal bearing and its housing.
- Carefully remove the old oil seal, avoiding scratching or damaging the housing surface.
- Thoroughly clean the seal seating area to remove any old sealant, grease, or corrosion.
- Apply a thin layer of appropriate marine grease to the new seal's outer and inner lips.
- Gently and evenly press the new seal into place using a suitable seal driver or socket until it is fully seated.
- Inspect the gimbal bearing and replace if necessary while the area is accessible.
- Reinstall the sterndrive unit, ensuring all connections and bolts are torqued to spec.
- Reconnect the battery and test for proper operation on the water, checking for any leaks.
Troubleshooting & FAQ
How do I know if my gimbal bearing oil seal is failing?
Common signs of a failing oil seal include water inside the bellows, a growling or rumbling noise from the transom area (indicating a failing gimbal bearing due to water intrusion), or visible grease leaking out of the drive assembly.
Is this seal compatible with all Bravo models?
Yes, this seal is designed to fit all Bravo I, II, and III models, including the X, XR, and XZ variants. However, always check the specific serial number ranges listed in our compatibility table to be certain.
What is the difference between this and the OEM seal?
Our aftermarket seal is designed to meet or exceed OEM specifications. It uses comparable high-quality materials, including a stainless steel housing and a durable NBR rubber lip, to provide reliable performance and longevity at a better value.
How often should the gimbal bearing oil seal be replaced?
It is recommended to inspect the oil seal whenever the sterndrive is removed for service and replace it as a preventative measure every few years, or immediately if you are replacing the gimbal bearing itself.
Can I install this seal myself?
While DIY installation is possible for those with mechanical experience and the correct tools (like a seal puller and driver), we recommend professional installation to prevent damage to the seal or housing, which could lead to premature failure.
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.
Payment & Security
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