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Sierra 18-3400 Water Pump Repair Kit for Johnson/Evinrude Outboard

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

118-3400
06/03/2036 3:44 AM
Sale Price

$39.49

In Stock (6)

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Usually delivered within 2 days

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No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3400 Water Pump Repair Kit is engineered to restore optimal cooling performance to Johnson and Evinrude outboard motors. This comprehensive kit eliminates the need to source individual components, providing all necessary parts for a complete water pump rebuild without the housing.

Complete Kit Contains:

  • 18-3050 Impeller
  • 18-3178 Wear Plate (Impeller Plate)
  • 18-3179 Water Pump Cup
  • 18-3326 Impeller Key (Pin)
  • 18-3329 Grommet
  • 18-2392 Grommet
  • 18-2025 Oil Seal
  • 18-7116 O-Ring
  • 18-7139 O-Ring
  • 18-3369 Stainless Steel Bolts (4 pieces)

Key Features:

  • Built with precision to meet or exceed OEM specifications
  • All components engineered for reliable performance and longevity
  • Does not include water pump housing
  • Complete rebuild solution in a single package

OEM Cross-References:

  • Johnson/Evinrude: 0391698, 0394711
  • GLM: 12251
  • Mallory: 9-48220

Maintaining your outboard's water pump is critical for preventing engine overheating and ensuring safe operation. This Sierra kit provides everything needed to service your water pump efficiently and get back on the water quickly.

Great experience, fast shipping

shopping experience with your company remains to be seen

Great customer service!

great site to shop from. I wish tax exempt refunds were faster.

Everything is very convenient and simple.5+

Easy to find parts and easy checkout

Good

So far so good

Good selection, good products, fast delivery.

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