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Sierra 18-3887 Marine Head Gasket for 7.4L 454 CID Engines

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

118-3887
08/05/2036 9:23 AM
Sale Price

$76.04

4 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 18-3887 is a premium marine cylinder head gasket engineered for 7.4L (454 CID) Gen V and Gen VI marine engines manufactured from 1992 and newer. This gasket provides a reliable seal between the cylinder head and engine block, ensuring optimal compression and preventing coolant and oil leaks in demanding marine environments.

Key Features:

  • Designed for 7.4L 454 cubic inch displacement Gen V and VI marine engines (1992-up)
  • OEM-quality construction meets or exceeds original equipment specifications
  • Compatible with Mercruiser, OMC, Crusader, and Volvo Penta stern drive applications
  • Precision-cut design ensures proper fit and sealing performance
  • Manufactured to strict quality standards for long-lasting durability

OEM Cross-Reference Numbers:

  • Mercruiser: 27-850470, 27-879150141, 27-811547
  • Crusader: 31136
  • OMC Stern Drive: 915325
  • Volvo Penta: 3853511
  • GLM: 36180

Sierra International is a trusted leader in aftermarket marine engine parts, offering comprehensive coverage for all major marine engine brands with a customer satisfaction warranty covering both parts and labor.

great job

great experience

I found good quality product more cheaper here. I installed the shocks. Did not have any problem.

great price

thanks

The only complaint I have is, your product does not list the OZ. of the products. You need to add alittle more detail.

easy site to navigate - excellent product selection

It looks like it will work but I haven't had time to install it. Con: No directions

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