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Sierra 18-2658 Lower Unit Seal Kit for Johnson/Evinrude Outboards

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

118-2658
06/01/2036 6:39 AM
Sale Price

$38.79

4 left at this price

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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 18-2658 Gear Housing Lower Unit Seal Kit is a comprehensive aftermarket seal kit engineered to meet OEM specifications for Johnson/Evinrude outboard motors. This complete seal kit provides all the essential gaskets, seals, o-rings, and washers needed for a professional lower unit rebuild or service.

Kit Contents Include:

  • Impeller plate gasket (18-0124)
  • Multiple oil seals for drive shaft, propeller shaft, and shift rod
  • O-rings in various sizes for complete sealing
  • Drain and fill plug washers (18-4248)
  • Rubber seals and shift rod washers

Key Features:

  • Replaces OEM part numbers 396351, 802340, 87680, and 9-74101
  • Manufactured by Sierra Marine, a trusted leader in aftermarket marine engine parts
  • Designed to withstand harsh marine environments and high-performance demands
  • Backed by Sierra's comprehensive customer satisfaction warranty

This seal kit is essential for maintaining proper lubrication and preventing water intrusion in your lower unit gearcase. All components are precision-manufactured to ensure reliable sealing and long-lasting performance during routine maintenance or complete lower unit overhaul.

Ease of use site

Ordered four tires it was quick and easy and delivery of the tires was fast also, overall a good experience.

They came perfectly

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SUPER EASY &amp;amp; great price assuming tires arrive on time as advertised

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Hi

This is my first order from you. So, we will see how it works out.

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