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Sierra 118-4563 Impeller Kit for Yamaha 70HP Outboards 2021-2024

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

118-4563
06/01/2036 3:38 AM
Sale Price

$85.56

In Stock (10+)

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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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 118-4563 (18-4563) Water Pump Impeller Kit is a complete cooling system service kit engineered specifically for Yamaha 70 horsepower outboard motors, model years 2021 through 2024. This kit provides everything needed for a thorough water pump impeller replacement to keep your engine's raw water cooling system performing at full efficiency.

The impeller is the core component of your outboard's raw water cooling circuit, drawing water from outside the hull and circulating it through the engine to prevent overheating. A worn, cracked, or degraded impeller can lead to reduced water flow, elevated operating temperatures, and potentially catastrophic engine damage.

Key Features:

  • Complete impeller service kit — includes impeller, gaskets, and seals needed for a full water pump service
  • Manufactured from high-quality rubber compounds, stainless steel, and composite plastics for superior durability in harsh marine environments
  • Meets or exceeds OEM specifications for proper fit, form, and function
  • Engine model-specific design ensures correct fitment for Yamaha 70 HP outboards (2021–2024)
  • Sierra's industry-leading limited lifetime warranty against manufacturer defects and workmanship
  • Sierra MPN: 118-4563 | Short MPN: 18-4563

Marine engine manufacturers typically recommend impeller replacement annually or every 100–200 hours of operation, whichever comes first. Regular impeller service is one of the most cost-effective ways to protect your outboard investment and avoid expensive overheating repairs. The Sierra 118-4563 makes it easy to perform a professional-quality water pump service at home or on the water.

Great place for tires

Positive

The delivery was late it was FedEx fault but thmotorsports refund my ten dollars charges for two days shipping. Wonderful service i will order from them again and again.

Paid for 2-day shipping but it took 4 days. I have not used the Simrad GPS yet so I cannot comment.

Quick easy and got my tires fast

Great price and ultra fast delivery.

Very low prices

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