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Sierra 18-0965 Adapter Outer Powerhead Gasket for Johnson/Evinrude Outboard

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

118-0965
06/01/2036 6:39 AM
Sale Price

$19.28

2 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 18-0965 Adapter Outer Powerhead Gasket is designed for Johnson/Evinrude V6 Looper outboard engines ranging from 185 to 250 HP (3.0-3.3L), manufactured in 1985 and later. This critical seal provides a precise barrier between the powerhead and the adapter plate, preventing exhaust and coolant leaks while maintaining proper engine compression and cooling efficiency.

Key Features:

  • Designed specifically for Johnson/Evinrude V6 Looper applications
  • Constructed from durable paper/composite material to withstand harsh marine environments
  • Meets or exceeds original equipment specifications
  • Direct replacement for hassle-free installation
  • Each package includes one gasket

OEM Cross-References: Replaces Johnson/Evinrude 333879, 0333879, 331214; GLM 35780; Mallory 9-60414; Marine Pro 121-13-879. Sierra marine parts are engineered to meet or exceed the performance of the original equipment parts they replace, ensuring reliable operation and long service life.

Easy process. Delivered on projected date.

These were long enough, unlike the first ones I ordered. Six foot doesn't do the job for even the smallest boats.

My students will benefit from the timing belt display (demo) unit I purchased from you! Fast shipping time, quality made and fair pricing! Thank you! :)

great price and selection for european automobiles

Very smooth

Had what I wanted for a good price.

Good

great experience

Easy

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