Exhaust Flapper Water Shutter with Grommets 60930 25-43809 Sierra 18-2727 Compatible with Mercruiser Stern Drives 2.5L to 6.2L Engines

Exhaust Flapper Water Shutter with Grommets for Mercruiser Stern Drives – 2.5L to 6.2L Engines The Exhaust Flapper Water Shutter is a mechanical component designed for use in the exhaust system of marine engines.It is installed near the transom or within the exhaust housing and regulates the flow of water and exhaust gases.The flapper opens during engine to allow water and exhaust to exit, and closes when the engine is off to prevent water from entering the engine compartment.This function supports proper cooling and protects internal components from water intrusion.This part is compatible with Mercruiser Stern Drive systems on engines ranging from 2.5L to 6.2L, including 3.0L, 3.7L, 4.3L, 5.0L, 5.7L, and 6.2L models.It serves as a direct replacement for part numbers 25-43809 and Sierra 18-2727.Common applications include various Mercruiser setups and some OMC configurations from multiple model years.The unit includes grommets that enable smooth pivoting of the flapper and a secure seal when closed.Constructed to endure marine conditions, it resists corrosion and wear from prolonged exposure to water, vibration, and temperature changes.Its design allows for straightforward installation without modifications, making it suitable for standard maintenance or replacement procedures.Regular inspection of the flapper and grommets is recommended to verify proper movement and sealing, especially after extended use or in saltwater environments.the flapper operates freely helps maintain consistent water flow through the exhaust system, supports effective engine cooling, and reduces the risk of water accumulation in the engine bay.

• Replacement for OEM 25-43809 and compatible with Sierra 18-2727 accurate fitment
• Designed for Mercruiser stern drives with engine sizes ranging from 2.5L to 6.2L
• Exhaust flapper water shutter helps prevent water backflow into the engine compartment
• Includes grommets for secure installation and sealing performance
• marine-grade construction suitable for consistent use in freshwater and saltwater environments