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Sierra 18-0409 Outer Wear Plate for Yamaha Outboard Water Pump

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

18-0409
08/04/2036 11:21 PM
Sale Price

$9.54

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Product Details

The Sierra International 18-0409 Outer Wear Plate is a precision-engineered replacement component for the water pump cooling system on Yamaha outboard engines. This wear plate serves as a protective barrier within the water pump assembly, guarding against abrasion and maintaining a proper seal between the impeller and pump housing to ensure consistent, reliable coolant flow.

Key Features:

  • Direct replacement for Yamaha OEM part number 69M-G4323-00
  • Engineered to meet or exceed original equipment quality and performance standards
  • Precision fit for proper impeller-to-housing sealing and optimal water pump efficiency
  • Designed to work within complete water pump repair kits (such as Sierra 18-4534)
  • Manufactured by Sierra International, a trusted leader in marine replacement parts

The Sierra 18-0409 is a key component of the Yamaha F2.5 four-stroke outboard water pump assembly. Whether servicing the cooling system as a standalone replacement or as part of a full water pump rebuild, this outer wear plate delivers the precise fit and durability needed to keep your outboard running at peak operating temperature.

seems to be just a few glitches with the check out, but seemed to be ok in the end

AAA

very cheap prices compared to competitors hoping product is as good as price.

Very user-friendly site. Very well formatted as well. Great job,keep up the good work!! Thank you again.

Nice and quick

So far so good

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