Mercruiser Gasket 911878 – Fits Mercruiser/OMC/BRP Marine Engines (Replaces 911878, 0911878)
Mercruiser Gasket 911878 – Fits Mercruiser/OMC/BRP Marine Engines (Replaces 911878, 0911878) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Mercruiser Gasket 911878 – Fits Mercruiser/OMC/BRP Marine Engines (...
Product Details
This Mercruiser Gasket 911878 is engineered for specific Mercruiser marine engines and also serves as a reliable shift rod cover gasket for various OMC, BRP, Johnson, and Evinrude applications. It provides a direct-fit sealing solution to prevent water and oil leaks.
It is a direct replacement for Mercruiser part 911878, OMC/BRP 0911878, Sierra Marine 18-0880-9 and 18-0880, and SEI Marine 95-107-03.
- Engineered for direct-fit installation.
- Designed specifically for marine engine environments.
- Includes one shift rod cover gasket per package.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercruiser | 911878 |
| OMC/BRP | 0911878 |
| Sierra Marine | 18-0880-9 |
| Sierra Marine | 18-0880 |
| SEI Marine | 95-107-03 |
Technical Specs
- Product Type
- Shift Rod Cover Gasket
- Installation
- Direct fit replacement
- Dimensions
- 7.13 cm × 6.0 cm × 0.13 cm
- Weight
- 0.01 kg (10 g)
- Application
- Marine engine gasket
What’s in the Box
- 1 x Shift Rod Cover Gasket (Replaces 911878 / 0911878)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery as a safety precaution.
- Locate and carefully remove the shift rod cover, taking note of fastener locations.
- Remove the old gasket completely and clean both the cover and engine mating surfaces to remove any residue.
- Align the new gasket onto the mounting surface; ensure all holes line up correctly.
- Re-install the shift rod cover and tighten the fasteners to the manufacturer-specified torque in a crisscross pattern.
- After installation, reconnect the battery and check for leaks or operational issues before resuming normal use.
Troubleshooting & FAQ
How do I verify this gasket fits my engine?
This gasket is designed for specific Mercruiser, OMC, and BRP applications. The most reliable method for confirming fitment is to cross-reference your original part number with the equivalents listed: Mercruiser 911878 or OMC/BRP 0911878.
What are the signs of a failing shift rod cover gasket?
Common symptoms include visible oil or water leaks around the cover area and potential shifting difficulties if water has entered the mechanism. A visual inspection for degradation or breaches in the seal is often the first step in diagnosis.
Is it okay to reuse an old gasket?
No. Gaskets create a seal by compressing into imperfections on the mating surfaces. Once used, they lose their ability to form a reliable, leak-free seal and should always be replaced with a new one during service.
What does the shift rod cover gasket do?
It creates a durable seal for the shift rod cover, preventing water intrusion or oil leakage from the gearcase. This protects critical internal components from contamination and corrosion.
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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