Exhaust Y Pipe Single Water Shutter Flapper Replaces MerCruiser 807166A1

Exhaust Y Pipe Single Water Shutter Flapper for MerCruiser

This exhaust Y pipe single water shutter flapper replaces MerCruiser part number 807166A1, functioning as a one-way check valve in the exhaust system to prevent water backflow into the engine.

Overview

This exhaust Y pipe single water shutter flapper for MerCruiser stern drives keeps water from entering the exhaust system while allowing exhaust gases to exit. Designed as a direct replacement for MerCruiser 807166A1, it maintains proper exhaust flow and protects the engine from water damage.

Built For Performance

• Direct OEM replacement for MerCruiser 807166A1
• Constructed from corrosion-resistant stainless steel and rubber
• Spring-loaded flapper ensures positive sealing
• Easy bolt-on installation with included hardware
• Tested for durability in marine environments

On-The-Job Use

• Installed in MerCruiser exhaust Y-pipes on V6 and V8 engines
• Prevents water ingestion during idle and shutdown
• Commonly used in stern drive and inboard-outboard boats
• Essential for boats operated in saltwater or heavy wake conditions

Specs At A Glance

Good To Know

Q: How do I know if my exhaust shutter flapper needs replacement? A: Signs include water leaking into the exhaust system, unusual engine noises, or a failed water lock test. Inspect the flapper for cracks or stiffness.

Q: Is this flapper compatible with both alpha and bravo drives? A: This exhaust Y pipe water shutter flapper is designed for MerCruiser applications, but verify serial number range as some models may vary.

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