18-2727 Exhaust Water Shutter for Mercruiser Stern Drives
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SIERRA18-2727 Exhaust Water Shutter for Mercruiser Stern Drives


In stock online.
Model # 6936470 | Mfg # 18-2727UPC # 808282111663


18-2727 Exhaust Water Shutter for Mercruiser Stern Drives

Name Value
Compatibility Mercruiser Stern Drive
Type Shutters

Product Overview

An added line of defense against exhaust backflow.

Many exhaust installations include shutters to prevent water from traveling back up the exhaust and into manifold. These connectors and shutters are exposed to endless heat cycling and saltwater abuse that can speed up the corrosion process and cause failure. Sierra has engineered these water shutters to match the OEM shutters on many MerCruiser installations and protect water from traveling back into the engine from the exhaust.

Key Features

  • Engineered to meet or exceed manufacturer specifications
  • Sold individually
  • Fits MerCruiser 3" exhaust systems
  • Protects sensitive engine components from being damaged by water traveling back through exhaust system
  • Backed by SeaStar Solutions Limited Two-Year Warranty

Sierra Part Number 18-2727 Application Table

ApplicationOEM Part Number
MerCruiser Sterndrive60930

The Sierra Engine Parts Selector

In addition to carb kits, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.


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