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Sierra 18-0517 Marine Oil Seal for MerCruiser Stern Drive & Mercury Marine

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

18-0517
08/06/2036 12:46 PM
Sale Price

$8.06

1 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 18-0517 is a precision marine oil seal engineered as a direct OEM replacement for MerCruiser stern drive and Mercury Marine applications. Constructed with a rubber lip for reliable sealing performance, this seal prevents oil leaks and protects critical engine and drivetrain components from contamination and fluid loss.

Key Features:

  • Shaft Size: 1.110 in.
  • Outer Diameter: 1.260 in. (32.00 mm)
  • Width: 0.127 in. (3.23 mm)
  • Lip Material: Rubber
  • Sold individually
  • Backed by the SeaStar Solutions Two-Year Warranty
  • Meets or exceeds OEM specifications

OEM Cross-References:

  • GLM: 85440
  • MerCruiser Stern Drive: 26-32911
  • Mercury Marine: 26-26209, 26-32911

Sierra International marine parts are built using high-grade materials to deliver exceptional durability and performance on the water. The 18-0517 oil seal is an ideal replacement to restore leak-free operation to your stern drive or outboard engine.

Best Price

Was quick and easy with Amazon checkout option!

Easy/ Quick ordering Like that they are affiliated with amazon

great prices need more products

None

good transaction so far. hopefully quick shipping....really need these to get my dump on the road!

the order was quick and inexpensive. I would have bought a carb if I could have found an Edlebrock I am not a holley fan sorry.

Good prices. Fast shipping. Fit my 2011 Dodge 3500 Mega Cab Dually perfect. Thanks.

Great and fast! Wrong image of the item...

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