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Sierra 18-2727 Exhaust Water Shutter 3 Inch Rubber Flapper

Manufacturer

Sierra

<p>For nearly six decades, Sierra has established itself as one of the marine industry's most trusted names in aftermarket engine and drive parts. Founded as a specialized marine parts manufacturer, Sierra has grown into a comprehensive supplier of replacement components, instrumentation, and accessories for both recreational and commercial boating applications. Operating from their 300,000-square-foot distribution center in Litchfield, Illinois, Sierra serves boat owners and marine technicians worldwide with an extensive catalog of parts engineered specifically for the harsh saltwater environment.</p><h3>Marine Engine Excellence</h3><p>Sierra's reputation was built on delivering precision-engineered internal engine components and drive system parts that meet or exceed OEM specifications. Their <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> provide critical sealing solutions for inboard and outboard motors, while their <a href="/7570-sierra-engine-complete-assembly-15341">engine complete assemblies</a> offer comprehensive replacement options for major overhauls. Each component undergoes rigorous testing to ensure reliability in demanding marine conditions, from corrosion resistance to temperature cycling performance.</p><h3>Instrumentation and Monitoring Systems</h3><p>Accurate instrumentation is essential for boat operators to monitor engine health and prevent costly breakdowns on the water. Sierra's comprehensive line of <a href="/7570-sierra-gauges-200483">gauges</a> includes everything from fuel pressure and temperature indicators to voltmeters and trim gauges, all designed with marine-grade materials that withstand vibration, moisture, and UV exposure. Their <a href="/7570-sierra-tachometer-gauge-1488">tachometer gauges</a> deliver precise RPM readings critical for optimizing engine performance and fuel efficiency. Supporting these instruments, Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> ensure proper signal conditioning and accurate readings across various sensor types and engine configurations.</p><h3>Expanded Product Portfolio</h3><p>In 2022, Sierra significantly broadened its scope beyond traditional marine engine parts to encompass a wider range of boating accessories and even outdoor power equipment components. This strategic expansion brought established marine brands like Shields and Moeller under the Sierra umbrella, creating a one-stop resource for marine maintenance and replacement parts. The company now offers fuel systems, electrical components, battery charging solutions, and NMEA electronics alongside their traditional engine parts lineup.</p><h3>Quality Backed by Industry-Leading Warranties</h3><p>What sets Sierra apart in the crowded aftermarket marine parts market is their commitment to standing behind every component they manufacture. Their warranty coverage extends beyond simple part replacement—it includes shop labor, haul-out fees, towing charges, and related incidental costs should a warrantied part fail. This comprehensive protection reflects the company's confidence in their manufacturing processes and quality control standards. For boat owners facing repairs far from shore or mechanics working on customer vessels, this peace of mind is invaluable. Whether you're maintaining an outboard motor, rebuilding an inboard engine, or upgrading your boat's instrumentation, Sierra's decades of marine industry experience and commitment to quality make them a reliable choice for keeping your vessel running at peak performance.</p>

Part Number

18-2727
06/01/2036 8:20 AM
Sale Price

$30.37

In Stock (9)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-2727 Exhaust Water Shutter is a marine engine exhaust component designed to prevent water from entering the engine through the exhaust system when the engine is not running. This external flapper-style shutter installs in the exhaust line and provides reliable one-way flow protection.

Key Features:

  • External flapper design allows exhaust gases to exit while blocking water backflow
  • Durable rubber construction resists saltwater corrosion and marine environment exposure
  • Compact dimensions: 3 inches in length x 3.780 inches in width
  • Direct replacement for worn or damaged exhaust shutters
  • Helps prevent costly water damage to engine components

This exhaust water shutter is an essential safety component for inboard and sterndrive marine engines, particularly important when the boat is moored or stationary. The rubber flapper automatically closes when exhaust pressure stops, creating a seal that prevents waves, wake, or rising water levels from entering the exhaust system and potentially reaching the engine cylinders.

Products specifications

Replaces

60930

easy to find, nice site; shipping options should be listed before we get to the cart, however.

Very easy to find the parts I need

Fast &amp; easy

Good

Great product at a very reasonable price. Driver could have helped lower package.

so far, so good

Easy to use site with the items I wanted!

Found correct item easily and checkout was fast. Once I received the item, it fit perfectly and works as expected.

Good prices

Simple checkout process

Great fast quality service. O high recommend shopping with autoplicity .. Two thumbs up !!!

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