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Sierra 118-4218 Brass Drain Tap 1/4" NPT for Marine 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

118-4218
06/03/2036 3:49 AM
Sale Price

$9.78

In Stock (10+)

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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 118-4218 is a brass drain tap designed for marine engine cylinder blocks and exhaust manifolds. This high-quality replacement part features a 1/4" NPT thread size and is engineered to meet or exceed OEM specifications for reliable performance.

Key Features:

  • Brass construction for superior durability and corrosion resistance
  • 1/4" NPT (6.4mm) thread size for universal compatibility
  • Designed for low-pressure drainage applications
  • Provides leak-proof metal-to-metal seal with hand tightening
  • Fits MerCruiser cylinder blocks and exhaust manifolds
  • Compatible with most OEM manifolds

OEM Cross-Reference Numbers:

  • MerCruiser: 22-16951A1, 22-16951Q1, 22-16951T1, 22-87238, 22-64426
  • OMC/Johnson/Evinrude: 379957, 509501
  • Volvo Penta: 82745
  • GLM: 13993
  • Mallory: 9-41201
  • Aqua-Power: 5154

This drain tap is essential for winterizing marine engines, allowing easy removal of excess water from cylinder blocks and exhaust manifolds to prevent corrosion and freeze damage during storage. The brass construction offers more durability than plastic or iron plugs and reduces the possibility of cross-threading.

Very happy with the product.

Ok

Easy ordering process. Tool arrived on time. I am very pleased with the results.

Will buy from here again.

Only website that had the specific tire I required. Thank you. Cheers.

I was extremely pleased with the purchase price and very fast shipping of my order. It arrived sooner than expected.

I wish the products had a more detailed description such as listing of it was for the right or left side or the back or front of the vehicle. Having to google part numbers to determine which area of the car was for was quite inconvenient. Other than that it was a great experience with great prices!

Good site I like

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