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Sierra 18-0128 Powerhead Mounting Gasket for OMC 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

18-0128
06/21/2036 4:10 PM
Sale Price

$10.74

2 left at this price

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-0128 is a precision-engineered powerhead base gasket designed for Johnson and Evinrude outboard motors. This critical gasket creates a reliable seal between the powerhead and adapter plate, ensuring optimal engine performance and preventing coolant or oil leaks.

Key Features:

  • Direct replacement for OMC part numbers 326468 and 351018
  • Manufactured to meet or exceed OEM specifications
  • Compatible with Johnson and Evinrude outboard engines
  • Precision-cut design ensures proper fit and seal
  • Backed by Sierra's quality assurance standards

Cross-Reference Compatibility:

  • GLM 35340
  • Johnson/Evinrude 326468, 351018, 0326468, 0351018
  • Mallory 9-60421

Sierra Marine is a trusted leader in aftermarket marine engine parts, offering comprehensive coverage for every major engine brand with an unsurpassed customer satisfaction warranty.

Great simple ordering process.

Ordered on a tuesday shipped out today. Have fast replies on emails. Will most likely be buying from them again in the future! Job well done Autoplicity!

Great prices. Great customer services. Reasonable shipping and ship time.

A+++++

This place is excellent. Very easy to use. My parts were shipped on time, and they kept me updated with multiple emails throughout the process. Would definitely buy from these guys again. A++

Best prices I can find!

Good service & communication with Sales Rep Keith Baldwin, Not so much the other guy I spoke with though. Great pricing and easy to navigate website.

Lowest prices on Autometer gauges I found on the web. This was 1st purchase with Autoplicity and it was a pleasant suprise. Low prices and quick shipping.

Good

fast

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