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Sierra 18-1848 Exhaust Manifold for 4.3L V6 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

118-1848
06/04/2036 1:46 PM
Sale Price

$303.77

2 left at this price

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Usually delivered within 2 days

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Product Details

The Sierra 18-1848 is a heavy-duty cast iron exhaust manifold designed for 4.3L V6 marine engines in OMC and Volvo Penta stern drive applications. This high-quality replacement manifold is engineered to meet or exceed OEM specifications and is fully compatible with 1990 and newer OMC and 1993 and newer Volvo Penta 4.3GS, 4.3GL, and 4.3GI engines.

Key Features:

  • Cast iron construction for durability in harsh marine environments
  • Painted, packaged, and leak-tested for quality assurance
  • Universal design fits either side of the engine (left or right)
  • Accepts all factory original accessories and fittings
  • Riser mating bolt dimensions: 3-7/8" x 2-19/32" bolt center-to-center
  • Backed by Sierra's industry-leading customer satisfaction warranty

Important Notes: Gaskets are not included with this manifold. Use Sierra 18-2909 gasket for the cylinder head mating surface and Sierra 18-0943 for the riser mating surface. Each purchase includes one manifold.

OEM Cross-References: Replaces Volvo Penta 3857656, 3857678, OMC 3852338-7, GLM 51480, and HGE 7656.

Ordering was easy. Got what I ordered at a fair price. Used the chat function to get an ETA on my package and they helped me quick and were responsive.

Great price, in stock, what till it comes in to assemble? That will be the test

Price was very reasonable. Original OEM product. Quick ship time. I was very pleased with Boatplicity and I will definitely purchase from them again.

Great customer service extremely fast shipping thanks

Great web site

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