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Quicksilver 805987 Bypass Hose - Water Pump to Intake Manifold

Manufacturer

Quicksilver

<p>Since 1950, Quicksilver has been delivering premium marine parts, accessories, and lubricants that set the standard for quality and performance on the water. As the premier supplier of Mercury Marine original-equipment parts and accessories, Quicksilver occupies a unique position in the marine aftermarket industry—it's the only marine brand manufactured and recommended by an original-equipment manufacturer.</p> <h3>Engineering Excellence Backed by Mercury Marine</h3> <p>What sets Quicksilver apart from other aftermarket brands is its direct connection to Mercury Marine's engineering expertise. No aftermarket company comes close to Quicksilver's level of research and design, and literally millions of hours have been spent on fired-engine testing and analysis. This rigorous development process ensures that every component meets the exacting standards required for marine environments, where reliability isn't just a preference—it's essential.</p> <p>Quicksilver offers the widest range of premium replacement parts and lubricants for Mercury engines and drives in the marine industry, while their expertise makes Quicksilver aftermarket parts and lubricants outstanding choices to service most major marine engine brands. Whether you're maintaining a Mercury, Yamaha, Honda, or Suzuki outboard, Quicksilver provides OEM-quality solutions that fit and function like the original components.</p> <h3>Comprehensive Product Range for Every Marine Application</h3> <p>From critical propulsion components to routine maintenance items, Quicksilver covers the full spectrum of marine parts needs. Their <a href="/200836-quicksilver-propellers-quicksilver-7456">propeller selection</a> represents decades of hydrodynamic research, offering precision-engineered designs that maximize thrust, fuel efficiency, and handling across different hull configurations and engine combinations.</p> <p>For fuel system reliability, <a href="/200446-fuel-pumps-kitscarburetor-kits-quicksilver-7456">Quicksilver fuel pumps and carburetor kits</a> deliver consistent performance even in demanding marine conditions where ethanol-blended fuels and temperature extremes can compromise inferior components. The brand's <a href="/200835-quicksilver-manifoldsriserselbows-quicksilver-7456">exhaust manifolds, risers, and elbows</a> are engineered specifically to handle the corrosive marine environment, featuring materials and coatings that resist saltwater degradation.</p> <p>Cooling system maintenance becomes straightforward with <a href="/2208-engine-water-pump-quicksilver-7456">Quicksilver water pumps</a> and impeller kits designed for easy installation and reliable operation. Regular impeller replacement is one of the most critical preventive maintenance tasks for any marine engine, and Quicksilver kits include all necessary gaskets and components for professional-grade results.</p> <p>The brand's <a href="/200382-external-engine-parts-quicksilver-7456">external engine parts</a> portfolio ensures that boat owners and marine technicians can source everything from mounting hardware to trim system components with confidence in fit and durability.</p> <h3>Quality You Can Trust</h3> <p>Quicksilver has earned a loyal following by providing the highest quality products for more than 60 years, and consumers consider it one of the most trusted brands in the markets it serves. With over 40,000 parts across 12 product lines, Quicksilver products can be found throughout the world, supporting recreational boaters, commercial operators, and marine service professionals alike.</p> <p>This commitment to quality extends beyond parts to include specialized marine lubricants, fuel additives, and maintenance products formulated specifically for the unique demands of marine engines. When you choose Quicksilver, you're buying performance, protection, and peace of mind—qualities that matter when you're miles from shore or simply want to maximize your time on the water.</p>

Part Number

805987
06/21/2036 3:47 PM
Sale Price

$18.63

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Product Details

The Quicksilver 805987 is a genuine OEM bypass hose designed to connect the water pump to the intake manifold on GM Big Block V8 marine engines. This critical cooling system component ensures proper coolant circulation between the top of the water pump and the intake manifold, maintaining optimal engine operating temperatures.

Key Features:

  • Genuine Mercury/Quicksilver OEM replacement part
  • Pre-formed molded rubber construction for precise fit
  • Designed specifically for Big Block 454 (7.4L) and 502 (8.2L) V8 engines
  • Compatible with MerCruiser stern drive applications
  • Direct replacement for worn or deteriorated original hose

Applications:

  • MerCruiser Race Model 420 GM 454 V-8 (1987-1989, serial numbers 0A398941 through 0B622418)
  • All GM 454 (7.4L) and 502 (8.2L) marine engines using this bypass hose configuration

Cross-Reference Part Numbers:

  • Mercury/MerCruiser: 32-805987, 32-66206
  • Crusader: 7140240, 30178
  • Marine Power: 0053-450
  • OMC/Volvo: 0914875

This bypass hose is essential for maintaining proper cooling system function in your marine engine. Replace worn or cracked hoses to prevent coolant leaks and ensure reliable engine performance on the water.

Great

Best price I found for what I was looking for.

Quick delivery! I would suggest minimizing the size of the box to save on costs. Box my Wilwood brake pads arrived in was at least 30 times the size of the pad box. Just a suggestion. Thanks!

You have the epoxy and west can&rsquo;t get it to me until next Thursday&hellip; maybe

simple and quick

Excellent!

Smooth sailing no issues

Very easy to process order

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