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Sierra 18-4227 Marine Drain Elbow for MerCruiser Stern Drive

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

18-4227
08/06/2036 1:37 PM
Sale Price

$12.21

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Product Details

The Sierra 18-4227 Drain Elbow is a precision-engineered marine replacement part designed for MerCruiser stern drive engines. This 100-degree angled elbow drain provides a reliable method for removing captured raw cooling water from exhaust risers, elbows, and manifolds — helping prevent internal corrosion and freeze damage during winter layup.

Constructed from high-impact nylon with a chromed flange, this drain elbow is built to withstand the harsh marine environment. The flush flange measures approximately 2-1/5" in diameter and fits into a 1-1/2" hole, leaving adequate room for sealant. The elbow extends roughly 2-1/2" below the underside of the flange and features more than 1" of thread for a secure fit, even on thicker fiberglass installations. The hose barb is sized to fit standard 3/4" ID maritime hose.

Key Features:

  • 100-degree angled elbow design for efficient drainage
  • High-impact nylon construction with chromed flange
  • Fits into a 1-1/2" hole with a 2-1/5" flange diameter
  • 3/4" ID hose barb for standard marine hose compatibility
  • Meets or exceeds OEM specifications

Replaces OEM and Cross-Reference Part Numbers:

  • MerCruiser: 22-806926, 22-862210
  • GLM: 13991
  • Mallory: 9-41202

Each Sierra part meets or exceeds the original equipment part it replaces, ensuring reliable, long-lasting performance in your marine engine's cooling and exhaust system.

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