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Sierra 118-4562 Impeller Kit for 25HP Outboard Motors (1998-2018)

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

118-4562
06/01/2036 3:38 AM
Sale Price

$28.38

In Stock (10+)

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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 118-4562 (18-4562) Impeller Kit is a complete water pump service kit engineered for 25 horsepower outboard engines covering model years 1998 through 2018. This kit delivers everything needed to restore your outboard's raw water cooling system to full operating efficiency.

The impeller is the heart of your outboard's cooling system, drawing raw water from outside the boat and circulating it through the engine to regulate temperature and prevent overheating. Replacing it at regular intervals is one of the most critical preventive maintenance tasks for any outboard motor.

Key Features:

  • Complete impeller service kit — includes impeller, gaskets, seals, and all hardware needed for a full water pump replacement
  • Manufactured to meet or exceed OEM specifications for proper fit, form, and function
  • High-quality rubber impeller with precisely molded blades for reliable pumping action and consistent water flow
  • Engineered for durability in harsh marine environments, season after season
  • Sierra's industry-leading limited lifetime warranty against manufacturer defects and workmanship
  • OEM Cross-Reference: Yamaha Outboard 61N-W0078-10-00, 61N-W0078-11-00, 61N-W0078-13-00, 61N-W0078-14-00
  • UPC: 808282391683

Sierra recommends replacing your impeller annually or every 100 hours of operation to prevent costly engine damage from overheating. With over 58 years as a trusted manufacturer of aftermarket marine engine and drive parts, Sierra delivers the reliability and quality boaters depend on.

Great place for tires

Fast shipping, good price, great communication. Can't ask for more.

Ordering was very easy and streamline. Hoping the delivery is just as good.

Great value and easy delivery.

It was good

I have one of these on another boat. I love it and it&amp;#039;s saved my lower unit more than once when I unexpectedly found a stump or hard bottom.. It also allows me to run with the motor higher because if the set back.

Easy to shop free shipping great

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