MerCruiser Water Flapper Exhaust Shutter 18-2727 9-42800 60930 222-22-930

Water Flapper Exhaust Shutter for MerCruiser

This water flapper exhaust shutter for MerCruiser replaces OEM part numbers 18-2727, 9-42800, 60930, and 222-22-930, and prevents water from entering the exhaust system.

Overview

This water flapper exhaust shutter is designed for MerCruiser marine engines. It functions as a one-way flapper that closes when the engine shuts off, stopping water from flowing back into the exhaust manifold. This shutter is a reliable replacement for worn or missing units, ensuring proper exhaust flow and preventing water damage.

Built For Performance

• Direct replacement for OEM part numbers 18-2727, 9-42800, 60930, and 222-22-930
• Made from corrosion-resistant materials for marine environments
• Spring-loaded flapper design for positive closure
• Easy to install with basic hand tools
• Ensures proper exhaust gas flow while preventing water ingress

On-The-Job Use

• Used in marine exhaust systems to prevent water from entering the engine
• Commonly installed in exhaust risers and manifolds
• Helps protect the engine from water damage during shutoff

Specs At A Glance

Good To Know

Q: Is this a genuine MerCruiser part? A: No, this is an aftermarket replacement specifically designed for MerCruiser engines. It matches OEM specifications and part numbers.

Q: How do I know if this fits my engine? A: Check your engine's part number against the cross-reference numbers listed. If your engine uses one of these numbers, this shutter will fit.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.