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Sierra 118-3118 Water Pump Housing for Mercury/Mariner Outboard Motors

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

118-3118
06/02/2036 6:39 PM
Sale Price

$17.94

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 118-3118 is a marine-grade water pump housing designed specifically for Mercury and Mariner outboard motors. This upper housing component is manufactured with durable, non-corrosive materials to withstand harsh marine environments and provide long-lasting performance.

Key Features:

  • Marine-grade construction resistant to corrosion and saltwater exposure
  • Hard-wearing housing designed for extended service life
  • Direct replacement for Mercury OEM parts 46-77822A1, 46-48746A1, and 46-48746A3
  • Compatible with Sierra water pump kits 18-3507, 18-3322, 18-3323, and 18-3324
  • Meets or exceeds original equipment specifications

Interchangeable Part Numbers:

  • GLM 12420
  • Mallory 9-43202
  • Mercury Marine 46-77822A1, 46-48746A1, 46-48746A3
  • AP Part 1109

Sierra is a trusted name in marine replacement parts, manufacturing high-quality components that provide reliable performance for outboard motor cooling systems. This water pump housing is an essential component for maintaining proper engine cooling and preventing overheating in your Mercury or Mariner outboard.

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Very competitive price on this product. The delivery was fast.

10/10 service.

We were very pleased with the quality of the bumper we purchased and the customer service was superb. We received both the bumper and kit within 3 days. This is the first time we ordered from Dirt Everywhere and we would not hesitate to order from them again. Thank You for the great service !!!

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