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Sierra 118-8382 Lower Unit Seal Kit for Mercury 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

118-8382
06/01/2036 10:27 PM
Sale Price

$27.61

1 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Sierra 118-8382 is a replacement lower unit seal kit designed specifically for Mercury outboard motors. This comprehensive seal kit provides all the essential seals and gaskets needed to maintain the lower unit gearcase and prevent water intrusion and gear oil leakage.

Key Features:

  • Direct replacement for Mercury Marine part number 26-816575A4
  • Also interchangeable with Mallory 9-74208
  • Designed to meet or exceed OEM specifications
  • Includes multiple seals, gaskets, and o-rings for complete lower unit service
  • Backed by Sierra's quality assurance standards

Application: Compatible with Mercury 200HP, 225HP, and 250HP outboard motors including EFI and Optimax DFI models. Fits 225HP EFI/250HP EFI (serial G129222 & up), 200HP (T801000 & up), 200HP Optimax DFI (G386496 & up), 225HP Optimax DFI (G590000-G960499), and 225HP (D280813-G437999). Designed for models with C-3 casting designation.

This seal kit is essential for lower unit maintenance and rebuild procedures, helping to ensure proper sealing and long-lasting performance of your Mercury outboard's lower gearcase.

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Good price and fast delivery.

My shopping experience was easy and found what I was looking for. Was offered a promo code that saved me 20.00. Also, was givin on the website different shipping options.

Good if it arrives as promised

Seems to have worked so far

EASY AND CONVIENT

as above

Fast delivery! Very satisfied.

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