Sierra 118-2727 Exhaust Water Shutter for MerCruiser Stern Drives

The Sierra 118-2727 Exhaust Water Shutter is designed for use in MerCruiser stern drives, providing critical protection against water backflow into your engine. This component prevents water from traveling back up the exhaust and into the manifold, safeguarding sensitive engine components from potential water damage.

Key Features:

• 3 inch length and 3.780 inch width
• Fits MerCruiser 3 inch exhaust systems
• Meets or exceeds original equipment specifications
• Includes one shutter per package
• Backed by SeaStar Solutions Limited Two-Year Warranty

OEM Cross-Reference:

• Replaces MerCruiser Stern Drive 60930
• Replaces Mallory 9-42800

Exhaust shutters are exposed to endless heat cycling and saltwater abuse that can speed up corrosion and cause failure, making regular inspection and replacement essential for maintaining reliable engine performance. This Sierra replacement part is engineered to match OEM specifications for proper fit and function.