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Sierra 18-1845 Dry Joint Exhaust Elbow Riser for MerCruiser V6 V8 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

118-1845
06/03/2036 10:36 PM
Sale Price

$311.64

In Stock (10+)

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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 18-1845 is a dry-joint exhaust elbow (riser) designed as a direct replacement for MerCruiser 864591T02. This precision-engineered exhaust component is manufactured specifically for 2004 and newer MerCruiser V6 and V8 engines (305, 350, and 377 CID) with serial numbers 0W310000 and up, as well as 2002 and newer V8 engines (350 and 377 CID) with serial numbers 0M317000 and up.

Key Features:

  • Machined using computerized CNC equipment for precise gasket mating surfaces
  • Replaces 14-degree down-angle risers (not compatible with 7-degree versions)
  • Universal fit design works on either side of the engine and accepts all original mounting brackets
  • 100% leak tested prior to leaving the manufacturing facility
  • Primed and painted for enhanced durability and protection against harsh marine environments
  • Precision tolerance controls ensure uniform wall and water jacket thickness

Compatible Components:

  • Use with Sierra 18-1843 exhaust manifold
  • Requires gasket: 18-0720 (closed), 18-0721 (open), or 18-0722 (restricted)

Sierra Marine has been manufacturing high-quality marine engine parts for over 50 years, building a reputation as one of the most trusted names in the marine aftermarket. This exhaust elbow is engineered to meet the demands of today's high-horsepower engines while providing reliable performance and long service life.

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