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Sierra 18-2049 Marine Oil Seal for MerCruiser Stern Drive Upper Driveshaft Housing

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

18-2049
07/15/2036 12:05 AM
Sale Price

$18.42

In Stock (5)

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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 18-2049 is a replacement marine oil seal designed for MerCruiser stern drive upper driveshaft housings. This seal fits the upper drive housing, functioning as the upper of the two vertical seals in the upper driveshaft housing, sealing around the lower driven gear and retaining oil within the upper driveshaft housing assembly.

Sierra marine oil seals are manufactured to match or exceed OEM specifications, providing a reliable, leak-free fit. This seal directly replaces Mercury Marine OEM part number 26-32511 and is sold individually.

Specifications:

  • Outer Diameter (O.D.): 2.005 in. (50.93 mm)
  • Shaft Size (I.D.): 1.250 in.
  • Width: 0.388 in. (9.86 mm)
  • Quantity: Sold individually

Interchangeable / Cross-Reference Part Numbers:

  • Mercury Marine / MerCruiser: 26-32511
  • GLM: 85020
  • Mallory: 9-76111

Sierra International is a trusted manufacturer of marine engine parts, offering a broad range of oil seals built with quality materials to ensure proper fit and long-lasting performance in stern drive and outboard applications.

Fast, easy, good prices

Not enough product's information to identify the correct item to purchase.

shipment came on time, and was nicely wrapped.

Definitely the lowest price! Quick shipping, and great communication and follow-through.

Fast , Smooth transaction

Great so far.

Thank You! I hope they will not melt down during shipping from this HEAT. I live in Texas and it has gotten HOT. Also I hope UPS or FedX do NOT throw these babies around like they sometimes do. Thanks again.

Great Transaction. Best internet price. Great communication and willingness to make it right.

Thanks

Best price found. Excellent customer service. Thank You!

A+ part as advertised, quick shipping.

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