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Sierra 18-7275 Marine Mechanical Fuel Pump for MerCruiser GM V8 454

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

18-7275
08/02/2036 9:22 PM
Sale Price

$194.37

2 left at this price

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Usually delivered within 2 days

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FREE SHIPPING

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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 18-7275 is an AC-style mechanical fuel pump engineered as a direct replacement for MerCruiser and OMC marine inboard/sterndrive engines. Designed for GM V8 big block applications, this pump delivers reliable fuel flow to keep your marine engine performing at its best on the water.

Built to meet or exceed OEM specifications, this pump features a durable, corrosion-resistant construction suited for the demanding marine environment, including saltwater applications. The mounting gasket is included for a complete, straightforward installation.

Key Features:

  • AC-style mechanical fuel pump designed for marine use
  • Flange I.D. #41422 for precise fitment
  • Fuel inlet at 9 o'clock, outlet at 3 o'clock position
  • No provision for vent line to carburetor
  • Mounting gasket included
  • Corrosion-resistant construction suitable for saltwater environments
  • Meets or exceeds OEM specifications for fuel delivery and pressure

OEM Cross-Reference Numbers:

  • Mercury Marine / MerCruiser: 86247, 86247T
  • OMC: 509410

Backed by Sierra's industry-leading warranty, the 18-7275 is a trusted aftermarket solution for restoring proper fuel system operation on GM V8 big block marine engines.

I needed these, glad you had them on sale

very easy quick order thxs

Easy to use and lowest prices.

Nice site

It was good

quick, and easy. low prices as well

Product was the cheapest I could find. One other store was cheaper but did not have my product in stock. Autoplicity shipped within 2 days and the product arrived as described. I am happy with my purchase and would do business with Autoplicity again. The only thing I marked them on was that I wish they shipped within 1 day instead of 2.

Quick, efficient, professional

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So far so good

Crazy fast shipping. By far the best price of anywhere. The thule bike rack we ordered was in stock, lowest price, easy checkout process, and the company really appears to run an organized, professional business. Very happy with the level of service. We will definitely make sure to use autoplicity in the future.

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