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Sierra 18-3483 Marine Water Pump Housing Replacement

Manufacturer

Sierra

<h3>Sierra: Six Decades of Marine Aftermarket Excellence</h3><p><strong>Sierra</strong> has spent nearly 60 years earning its reputation as one of the most trusted names in the marine aftermarket industry. Originally focused on engine and drive components for boats, the brand has grown into a comprehensive source for nearly everything a boater needs to keep their vessel running at its best — from precision instrumentation to complete engine rebuild hardware.</p><p>Now operating as a brand of Dometic, Sierra manages global aftermarket distribution from a 300,000 sq. ft. facility in Litchfield, Illinois. The Sierra brand today encompasses not only its flagship marine parts line but also well-established marine names like Shields and Moeller, offering boaters a broader catalog than ever before. Whether you own an outboard, inboard, or sterndrive, Sierra's engineering team designs products to meet or exceed OEM specifications.</p><h3>Precision Instrumentation You Can Trust on the Water</h3><p>One of Sierra's most recognized product areas is its marine instrumentation lineup. The brand's <a href="/7570-sierra-gauge-set-1480">gauge sets</a> cover everything from classic analog instrument clusters to advanced digital multi-function displays. Sierra offers packages suited to outboards, sterndrives, and gasoline-powered inboards, with options ranging from coordinated analog kits in styles like Arctic, Eclipse, and Amega to modern touchscreen solutions like the R3 multi-function gauge. Features such as scratch-resistant domed glass lenses, silicone-dampened pointers, and perimeter backlighting make these instruments highly readable in all conditions.</p><p>Behind every accurate gauge reading is a properly calibrated sending circuit. Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> are a critical part of that chain, ensuring the signals from sensors and sending units are correctly interpreted by your instruments. These components are built to marine-grade standards to resist moisture, vibration, and corrosion — the realities of life on the water.</p><h3>Engine Internals Built to OEM Standards</h3><p>Sierra's history in marine power is perhaps best demonstrated by its deep catalog of engine components. The brand's <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> cover a wide range of outboard and inboard applications and are engineered to deliver reliable seals in the demanding thermal and chemical environment of a marine engine. For boaters performing seasonal overhauls, top-end rebuilds, or full engine restorations, Sierra gasket kits are a go-to resource trusted by professional marine technicians and DIY boaters alike.</p><h3>A Complete Marine Parts Partner</h3><p>Beyond instrumentation and engine internals, Sierra's catalog spans fuel systems, electrical supplies, steering components, shore power, and more — all covered by what the brand calls an industry-leading warranty. Sierra also maintains a comprehensive parts-finder tool that enables cross-referencing with OEM part numbers from major manufacturers including Mercury, Yamaha, Suzuki, Volvo Penta, and others, making it straightforward to find the right replacement part for virtually any application.</p>

Part Number

18-3483
09/11/2036 7:16 PM
Sale Price

$23.97

3 left at this price

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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 18-3483 is a replacement water pump housing designed for marine outboard and sterndrive cooling systems. The water pump housing is a critical component of the engine's raw water cooling circuit, encasing the impeller and directing water flow to prevent overheating.

Over time, water pump housings can wear, crack, or corrode — reducing cooling water flow and increasing the risk of engine overheating. Replacing a worn or damaged housing restores proper water pressure and flow to keep your engine running at safe operating temperatures.

Key Features:

  • Direct replacement water pump housing for compatible marine engines
  • Engineered to meet or exceed OEM specifications and fitment standards
  • Manufactured by Sierra International, a trusted name in aftermarket marine parts
  • Designed to work with Sierra and OEM-compatible impellers, wear plates, and seals
  • Durable construction built to withstand the harsh marine environment

Sierra International has been producing premium-quality aftermarket marine replacement parts for decades, with a catalog covering thousands of components for major engine brands. The 18-3483 water pump housing is sold as a standalone replacement part and is ideal for use during a water pump service or rebuild.

The Mobil app SUCKS. After three (3) attempts to order this part, I had to wait until I was home to order it with my laptop.

Quick and easy.

Price was great although shipping was a little higher than other vendors. The status of the order online always showed as order passed to the warehouse so I had to call to find out what was happening with the order. Later that day the item arrived. Overall I'm happy with the service.

Not bad.. Except for one I was on your website the other day and I was going to order but I never did and I went on today to do that same order in the shipping prices Were double I don't understand why

good

Fast, easy &amp; good prices

So far so good!

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