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Sierra 18-1843 Dry Joint Exhaust Manifold MerCruiser V8

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

118-1843
06/03/2036 10:36 PM
Sale Price

$394.63

In Stock (6)

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Usually delivered within 2 days

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Product Details

The Sierra 18-1843 is a cast iron dry joint exhaust manifold designed as a direct OE replacement for MerCruiser V8 marine engines. This manifold fits 5.0L, 5.7L, and 6.2L engines (305, 350, and 377 CID) from model year 2002 and newer equipped with dry joint exhaust systems.

Key Features:

  • Cast iron construction with center rise design for durability in harsh marine environments
  • 100% leak tested to ensure quality and reliability
  • Includes manifold-to-head gasket, mounting bolts, and plugs for complete installation
  • Primed and painted for added corrosion protection
  • Computerized CNC machining ensures proper gasket mating surfaces and precision tolerance control
  • Ready to install out-of-the-box with all necessary hardware

This manifold directly replaces MerCruiser part numbers 865735A02, 865049T01, 864308T01, and 8M0185794. Designed to work with Sierra riser 18-1845 and riser gaskets 18-0720 (closed), 18-0721 (open), or 18-0722 (restricted). Manifold gasket 18-2949 is also recommended (riser gasket not included). Manufactured to meet or exceed OEM specifications and backed by Sierra's comprehensive warranty for the useful life of the product.

Easy to order on line.I received help from them and was helpfull.

Great

Good

Easy transaction, lowest price on the net

super easy and they actually have the size i need

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