Exhaust Elbow Gasket – Fits Mercury MerCruiser 4.3L-8.2L Sterndrives (Replaces 27-863726, 27-860232)

$14.99

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Exhaust Elbow Gasket – Fits Mercury MerCruiser 4.3L-8.2L Sterndrives (Replaces 27-863726, 27-860232) is backordered and will ship as soon as it is back in stock.

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Product Details

This high-quality Exhaust Elbow Gasket is designed for a precise fit on Mercury MerCruiser 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L V6 & V8 engines with center rise outlet exhaust manifolds, covering models primarily from 1998 to 2001. It creates a reliable seal between the exhaust manifold and the 4" riser to prevent water and exhaust leaks.

It serves as a direct interchange for multiple OEM and aftermarket part numbers, including Mercury/Quicksilver 27-863726 and 27-860232, Sierra 18-2849-1, GLM 32080, and others.

Engineered for standard (full flow) cooling applications.
Constructed from durable graphite composite to withstand high temperatures.
Designed for a 4" exhaust riser connection.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Mercury / Quicksilver	27-863726
Mercury / Quicksilver	27-860232
Mercury	27-818832
Mercury	27-871051
Mercury	27-87105
Sierra	18-2849-1
Barr	8503-GO
Mallory	961414
GLM	32080

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Designed for various 4-stroke V6 and V8 MerCruiser engines manufactured between 1998 and 2001 (with some exceptions) that use a center rise outlet exhaust manifold.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
MerCruiser	4.3L 262 CID V6 GM	Various	4-Stroke	1998–2001	27-863726	Center rise outlet exhaust manifold
MerCruiser	5.0L 305 CID V8 GM	Various	4-Stroke	1998–2001	27-863726	Center rise outlet exhaust manifold
MerCruiser	5.7L 350 CID V8 GM	Various	4-Stroke	1998–2001	27-863726	Center rise outlet exhaust manifold
MerCruiser	6.2L 377 CID V8 GM	Various	4-Stroke	1998–2001	27-863726	Center rise outlet exhaust manifold
MerCruiser	7.4L 454 CID V8 GM	Various	4-Stroke	1998–2001	27-863726	Center rise outlet exhaust manifold
MerCruiser	8.2L 502 CID V8 GM	Various	4-Stroke	1998–2001	27-863726	Center rise outlet exhaust manifold
MerCruiser	350 MAG MPI SKI	Various	4-Stroke	1998+	27-863726	Gen+ models
MerCruiser	454 MAG MPI BRAVO	Various	4-Stroke	1998	27-863726	Gen VI engines
MerCruiser	502 MAG MPI BRAVO	Various	4-Stroke	1998	27-863726	Gen VI engines
MerCruiser	5.0L EFI	Various	4-Stroke	1998–1999	27-863726	Standard cooling models
MerCruiser	5.7L EFI	Various	4-Stroke	1998–1999	27-863726	Standard cooling models

Technical Specs

Product Type: Exhaust Elbow Gasket
Installation Type: Full Flow (Open) Type
Material: Graphite Composite
Application: Standard cooling applications
Connection Size: Fits 4" exhaust riser connections
Operating Temperature: Engine exhaust temperature range

What’s in the Box

4 x Exhaust Elbow Gasket (Replaces 27-863726 / 27-860232)

Installation Notes

Ensure the engine is completely cool before starting work.
Disconnect the battery and close the water seacock.
Carefully drain water from the exhaust manifold.
Remove the bolts connecting the exhaust riser/elbow to the manifold.
Gently separate the riser from the manifold and remove the old gasket.
Thoroughly clean both mating surfaces. Ensure they are free of old gasket material, rust, and debris.
Place the new gasket into position, ensuring it is correctly aligned. Do not use sealant unless specified by your engine manual.
Re-install the riser/elbow and tighten the bolts to the manufacturer's recommended torque specification and sequence.
Reconnect the battery, open the seacock, and start the engine.
Check carefully for any water or exhaust leaks around the new seal.

Troubleshooting & FAQ

What is the difference between an open (full flow) and restricted gasket?

This is a an open, or "full flow," gasket. It's designed for standard raw water cooling systems where maximum water flow through the exhaust manifold is needed for cooling. Restricted gaskets have smaller water passages and are used in closed-loop or freshwater cooling systems to regulate engine temperature. Using the wrong type can cause overheating or over-cooling.

How can I confirm this gasket fits my specific engine?

This gasket is for MerCruiser V6/V8 engines (1998–2001) with 4-inch center-rise exhaust manifolds. The most reliable method is to check your engine model and year in the compatibility list, visually match the part, and confirm your old part number matches one of the cross-references listed in our Part Number Matrix.

What are the signs of a failing exhaust elbow gasket?

Common symptoms include water leaking externally from the joint between the manifold and riser, unexplained water in the bilge, engine overheating, steam from the engine compartment, or a rusted, corroded seal. Any of these signs warrant an immediate inspection.

Why does this kit include four gaskets?

A standard V-block engine (V6 or V8) has two exhaust manifolds, each requiring one riser gasket. This four-pack provides a complete set for a twin-engine boat (two gaskets per engine) or allows a full replacement with a complete spare set for a single-engine boat.

Is sealant required for installation?

These graphite composite gaskets are designed to be installed dry. Applying sealants can cause the gasket to slip out of place during tightening or fail to seal properly. Always follow the installation guidelines in your official service manual, but typically no sealant is needed.

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

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