Mercury MerCruiser Exhaust Block-Off Plate Kit

The Mercury MerCruiser 861776A2 Exhaust Block-Off Plate Kit is a genuine OEM component designed for use when converting MerCruiser Alpha and Bravo sterndrive installations to through-transom or through-hull exhaust systems.

The kit blocks the original gimbal housing exhaust passage, preventing exhaust gases from exiting through the sterndrive and ensuring the exhaust system is routed correctly through the transom-mounted exhaust outlets. Mercury recommends installation before the engine is fitted where possible.

Manufactured to Mercury Marine specifications, the kit includes the block-off plate and mounting hardware required for installation. It is commonly used on performance and custom exhaust conversions.

Features:

• Genuine Mercury Marine OEM part
• Designed for Alpha and Bravo sterndrives
• Blocks off the gimbal housing exhaust port
• Required for many through-transom exhaust conversions
• Includes mounting hardware
• Corrosion-resistant marine construction
• Direct OEM fit and installation

Benefits:

• Allows correct installation of through-hull exhaust systems
• Prevents exhaust leakage through the gimbal housing
• Maintains proper exhaust routing
• OEM quality and reliability
• Suitable for performance and custom exhaust installations

Typical Applications:

• MerCruiser Alpha One Gen II
• MerCruiser Bravo One
• MerCruiser Bravo Two
• MerCruiser Bravo Three
• Through-transom exhaust conversions
• Through-hull exhaust installations

Replaces:

• 97350T1

Category:
Exhaust System Components

Tags:
Mercury, MerCruiser, Exhaust Block Off Plate, Through Hull Exhaust, Through Transom Exhaust, Alpha One, Bravo One, Bravo Two, Bravo Three, 861776A2, Gimbal Housing, OEM Mercury

SKU:
861776A2