Water shutter 807166A3 acts as a flexible check valve to stop water from returning up the exhaust system to the engine, which can cause serious damage. Also known as a water flapper, it is installed downstream of the flexible union between the elbow and Y-pipe in various MerCruiser sterndrive installations.
- Acts as a flexible check valve to stop water from returning up the exhaust system
- Also called a water flapper; 2.5 in. diameter at cross pin
- Fits numerous MerCruiser sterndrive installations
- Fits inline inside the exhaust system for sterndrive installations
- Installed downstream of the flexible union between the elbow and Y-pipe
