My Account
Shopping Cart

Quicksilver 861590A05 Circulating Pump Hose for MerCruiser GM V8 Engines

Manufacturer

Quicksilver

<h3>Quicksilver: The Marine Enthusiast&apos;s Trusted OEM Brand</h3><p>For boaters who refuse to compromise on quality, <strong>Quicksilver</strong> has been the benchmark for marine parts, accessories, and engine care products since 1950. Based in Fond du Lac, Wisconsin, Quicksilver operates as the parts and accessories brand of Mercury Marine — and that heritage is central to everything it makes. As the only marine aftermarket brand manufactured and recommended by an original-equipment manufacturer, Quicksilver brings factory-level engineering directly to boat owners, professional technicians, and weekend warriors alike.</p><p>What sets Quicksilver apart from generic aftermarket suppliers is its direct lineage to the engineers who designed the engines in the first place. Every component is engineered, tested, and manufactured with the same exacting standards as the original equipment it replaces. The result is a product line that fits right the first time and delivers the reliability boaters depend on — whether they&apos;re navigating calm inland lakes or pushing through demanding saltwater conditions.</p><p>Quicksilver&apos;s catalog spans more than 40,000 parts across 12 product lines, covering outboard and sterndrive engines from Mercury, Mariner, Yamaha, Honda, Evinrude, Johnson, Suzuki, and more. Among the most critical components in that lineup are Quicksilver Fuel Pumps, which are built to deliver factory fit and consistent fuel delivery across a wide range of outboard applications. Reliable fuel delivery is the foundation of engine performance, and Quicksilver&apos;s fuel system components are engineered to handle the demanding conditions of marine use — including compatibility with current fuel formulations.</p><p>Beyond fuel systems, Quicksilver is a go-to source for Propeller Parts &amp; Accessories that help boaters maintain and optimize their propulsion systems. From hub kits that protect both prop and gearcase to installation hardware and prop tools, these components are designed to the same tolerances as the drives they support. Proper propeller maintenance is one of the most impactful things a boat owner can do for performance, efficiency, and engine longevity — and Quicksilver makes that job straightforward.</p><p>The brand&apos;s commitment extends across lubricants, impellers, thermostats, anodes, fuel filters, oil filters, maintenance kits, and complete service packages — all engineered for the marine environment and tested to meet or exceed the standards of major engine manufacturers. Whether you&apos;re performing routine seasonal maintenance or tackling a more involved repair, Quicksilver provides the parts that restore your engine to peak operating condition.</p><ul style="list-style:disc"><li>OEM-backed engineering from Mercury Marine</li><li>Compatible with Mercury, Yamaha, Honda, Evinrude, Johnson, Suzuki, and Mariner engines</li><li>Over 40,000 parts spanning 12 product lines</li><li>Formulated and tested for freshwater and saltwater environments</li><li>Trusted by DIY boaters and professional marine technicians since 1950</li></ul><p>When reliability on the water is non-negotiable, Quicksilver delivers the peace of mind that only a true OEM-backed brand can provide.</p>

Part Number

861590A05
09/12/2036 9:58 AM
Sale Price

$49.03

In Stock (10+)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Quicksilver 861590A05 is a genuine OEM circulating pump hose assembly designed specifically for MerCruiser marine engines equipped with GM V-6 and V-8 powerplants. This factory replacement hose ensures reliable coolant circulation through your engine's water pump system, maintaining optimal operating temperatures on the water.

Key Features:

  • Genuine Mercury Marine OEM part for guaranteed fit and performance
  • Includes integrated drain fitting for convenient coolant system maintenance
  • Compatible with MerCruiser MCM (MerCruiser Marine) and MIE (MerCruiser Inboard) models
  • Engineered specifically for GM small block V-8 engines: 305 CID (5.0L), 350 CID (5.7L), and 377 CID (6.2L)
  • Allows draining of engine circulating water pump without hose removal
  • Factory-grade rubber construction resistant to marine environment conditions

This circulating pump hose assembly is a direct replacement for worn or damaged hoses in your MerCruiser cooling system. The integrated drain fitting simplifies winterization and maintenance procedures, making it easier to protect your marine engine during off-season storage. Quicksilver parts are manufactured to Mercury Marine's exacting specifications, ensuring the same quality and reliability as the original equipment installed on your engine.

Easy order - now let&#039;s see if 2 day shipping is really true! ;)

Yeah everything was just fine I'll recommend it anybody

Shopping experience was good, but the picture does not match the item. Leads to confusion.

Right prices and free shipping,

Website is great

Great experience. Super fast shipping. Great product. Great price. Thank you. Will buy from you again in future.

Great price

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy