Gasket – Fits Mercury/Mercruiser (Replaces 27-782461)
Gasket – Fits Mercury/Mercruiser (Replaces 27-782461) 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
Gasket – Fits Mercury/Mercruiser (Replaces 27-782461)
Product Details
This Mercury Marine gasket is used in driveshaft housing and exhaust tube assemblies for various Mercury and Mercruiser marine engines.
It is a direct replacement for Mercury part number 27-782461 and an interchange for Sierra part number 18-2947.
- Installs in the driveshaft housing and exhaust tube assembly.
- Engineered to create a reliable seal against exhaust and water.
- Designed for compatibility with specific Mercury/Mercruiser engine models.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 27-782461 |
| Sierra | 18-2947 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is used in the driveshaft housing and exhaust tube assembly for the following Mercury/Mercruiser engines.
| Brand | Model | Rated HP | OEM Part No. | Notes |
|---|---|---|---|---|
| Mercury/Mercruiser | 150/175/200 EFI | 150-200 | 27-782461 | Used in driveshaft housing and exhaust tube assembly |
Technical Specs
- Product Type
- Gasket
- Installation
- Driveshaft Housing/Exhaust Tube
- Dimensions
- Length: 1.13 in, Width: 7.13 in, Height: 6.00 in
- Weight
- 0.02 lb (0.009 kg)
- Other Technical Attributes
- Used in driveshaft housing and exhaust tube assembly
What’s in the Box
- 1 x Gasket (27-782461)
Installation Notes
- Ensure the engine is off and cool. Disconnect the battery for safety.
- Access the driveshaft housing and exhaust tube area as per your engine's service manual.
- Carefully remove the old, worn gasket. Be thorough in cleaning any residual material from the mating surfaces.
- Ensure both surfaces are clean, dry, and free of debris for a proper seal.
- Position the new gasket correctly, aligning it with all mounting holes.
- Reassemble the components, tightening all fasteners to the manufacturer’s specified torque and sequence.
- After reassembly, reconnect the battery, start the engine, and check for any exhaust or water leaks around the repair area.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket fits various Mercury/Mercruiser engines, including the 150/175/200 EFI models. To ensure a correct fit, please compare your original part to our images and specs, and confirm your OEM part number is 27-782461.
What are the signs of a failing exhaust tube gasket?
Common signs of a bad gasket include visible exhaust or water leaks around the driveshaft housing, an unusually loud engine exhaust noise, or potential engine overheating. A physical inspection might show the gasket is cracked, brittle, or degraded.
Is sealant required for this gasket installation?
Whether a sealant is needed depends on your specific engine model's service manual recommendations. Some gaskets are designed to be installed dry, while others benefit from a thin layer of a specific marine-grade sealant. Always consult your manual for the correct procedure.
When should this gasket be replaced?
It is recommended to replace this gasket any time the components it seals are disassembled for maintenance or repair. It should also be replaced immediately if you notice any signs of a leak or 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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