Exhaust Elbow Riser Dry Joint Gasket Closed for MerCruiser 864549A1

Product Overview

This closed dry joint gasket seals the connection between the exhaust elbow and riser on MerCruiser marine engines. Designed to prevent exhaust leaks and water intrusion, it restores proper engine breathing and cooling flow. This exhaust elbow riser gasket is a direct replacement for worn or failed OEM gaskets in sterndrive and inboard MerCruiser applications.

Key Features & Performance

• Closed dry joint design blocks exhaust gases from entering the cooling water passage
• Precision-cut fiber material withstands high exhaust temperatures and marine moisture
• Direct fit replacement for MerCruiser OEM part numbers 864549A1 and 27-864549A1
• Prevents corrosion and water lock caused by leaking exhaust riser joints
• Easy drop-in installation with no need for additional sealants

Fitment & Compatibility

• MerCruiser gasoline engines (inline and V6/V8 models) using a closed dry joint riser configuration

Common Uses

• Replacing old or blown exhaust elbow riser gaskets on MerCruiser stern drive and inboard engines
• Rebuilding exhaust riser assemblies during winterization or annual maintenance
• Repairing water leaks or exhaust soot trails at the elbow-to-riser connection

Technical Specifications

• Part Number(s): 864549A1, 27-864549A1
• Type: Dry Joint Gasket (Closed)

Frequently Asked Questions

Q: What is the difference between a closed and open dry joint gasket? A: A closed gasket blocks exhaust from mixing with cooling water inside the riser, used on engines with separate wet exhaust systems. An open gasket allows some mixing.

Q: Can this gasket be reused after removal? A: No, exhaust gaskets compress during installation and should always be replaced with a new one when the joint is opened.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.