Gear Housing Seal Kit – Fits MerCruiser Bravo I, II, III & X Stern Drives (Replaces 26-76868A04)
Gear Housing Seal Kit – Fits MerCruiser Bravo I, II, III & X Stern Drives (Replaces 26-76868A04) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Gear Housing Seal Kit – Fits MerCruiser Bravo I, II, III & X St...
Product Details
This Gear Housing Seal Kit – Fits MerCruiser Bravo I, II, III & X Stern Drives (Replaces 26-76868A04) is a comprehensive set designed for the driveshaft housing on MerCruiser Bravo series sterndrives. It includes all necessary seals, o-rings, and gaskets for a complete service.
It serves as a direct replacement for MerCruiser 26-76868A04, 26-76868A2, and 26-76868A1, as well as aftermarket equivalents like Sierra 18-2645, Mallory 9-74300, and GLM 87490.
- Installation Area: Designed specifically for the driveshaft housing.
- Durable Materials: Made from high-quality rubber compounds to ensure a long-lasting seal.
- Complete Kit: Includes all essential oil seals, water tube seals, and o-rings for the job.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 26-76868A04 |
| MerCruiser | 26-76868A2 |
| MerCruiser | 26-76868A1 |
| Sierra | 18-2645 |
| Mallory | 9-74300 |
| GLM | 87490 |
Engine & Model Compatibility
Confirm your engine model in the table below. This kit is designed for the specified MerCruiser Bravo series sterndrives.
| Brand | Model | OEM Part No. |
|---|---|---|
| MerCruiser | Bravo I | 26-76868A04 |
| MerCruiser | Bravo II | 26-76868A04 |
| MerCruiser | Bravo III | 26-76868A04 |
| MerCruiser | Bravo X | 26-76868A04 |
Technical Specs
- Product Type
- Gear Housing Seal Kit
- Installation
- For Driveshaft housing
- Housing Material
- Rubber
- Housing Color
- Black
- Product Dimensions
- 11.5" L x 11.5" W x 6.5" H
- Weight
- 0.26 lbs (0.118 kg)
- Warranty
- 1 year factory warranty against defects and workmanship
What’s in the Box
- 1 x Driveshaft Housing Seal Kit (76868A04)
- 2 x Oil Seal (26-76868/8M0204670)
- 1 x Water Tube Seal (26-805344)
- 1 x Oil Seal (26-814242)
- 1 x Oil Seal (26-821092)
- 1 x Drain Plug Seal (26-830749)
- 1 x Outer Propshaft Seal (26-861694)
- 1 x Inner Propshaft Seal (26-8M0033407)
- 1 x O-RING (25-20826)
- 2 x O-RING .924 X .103 (25-29845)
- 1 x O-RING 3.850 X .210 (CP) (25-31534)
- 1 x O-RING 2.425 X .103 (25-33465)
- 1 x O-RING 4.600 X .210 (25-34821)
- 1 x O-RING 1.046 X .139 (25-35027)
- 1 x O-RING (25-805331)
- 1 x O-RING (25-805726)
- 1 x Seal Water Tube (26-36556)
- 1 x Seal Quad Ring (26-455771)
Installation Notes
- Safely secure the vessel and drain the gear lube from the sterndrive.
- Carefully remove the sterndrive assembly from the transom mount.
- Disassemble the driveshaft housing to access the old seals and o-rings.
- Thoroughly clean all mating surfaces, removing any old gasket material or debris.
- Install the new seals and o-rings from the kit, applying a light coat of marine grease to prevent binding.
- Reassemble the driveshaft housing, ensuring all components are correctly seated and torqued to manufacturer specifications.
- Reinstall the sterndrive assembly onto the transom.
- Refill the drive with fresh, high-quality marine gear lube to the proper level.
- Before operation, run the engine on a flush device and check for any signs of water or oil leaks.
Troubleshooting & FAQ
How do I know if this seal kit fits my MerCruiser Bravo drive?
This kit fits MerCruiser Bravo I, II, III, and X models. To ensure compatibility, cross-reference your existing part number with those listed in our Part Number Matrix and check the models in the compatibility table. Always visually compare your old parts to our product images before installation.
What are the signs of a failing gear housing seal?
Common symptoms include a milky, grey, or white appearance in your gear lube (indicating water intrusion), visible oil leaks from the sterndrive, or a persistent low gear lube level. Prompt replacement is crucial to prevent catastrophic gearcase failure.
Is this a complete kit for the entire Bravo drive?
This kit specifically contains the seals, gaskets, and o-rings for the driveshaft housing. It may not include every seal for the entire upper and lower unit. Please review the "What's in the Box" section and verify against your service manual's requirements.
How often should these seals be replaced?
Seals should be inspected during regular annual service and replaced if there are any signs of leaks, cracking, or deterioration. It is best practice to replace them whenever the sterndrive is disassembled for other service to ensure reliability.
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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