My Account
Shopping Cart

Quicksilver 865066 Heat Exchanger Seal to Crossover

Manufacturer

Quicksilver

<h3>About Quicksilver</h3><p><strong>Quicksilver</strong> has been a cornerstone of the marine industry since 1950, delivering the parts, accessories, and engine care products that keep boats running at their best. A division of Brunswick Corporation and closely aligned with Mercury Marine, Quicksilver has grown into one of the most trusted names on the water — offering more than 40,000 parts across a broad range of product lines designed for both the weekend boater and the seasoned marine professional.</p><p>What sets Quicksilver apart is its unique position as the premier supplier of Mercury Marine Original Equipment replacement parts, while simultaneously serving owners of nearly every major marine engine brand. Whether your vessel is powered by Mercury, Mariner, Honda, Yamaha, Evinrude/Johnson, or Suzuki, Quicksilver produces components engineered to fit and perform like the originals. This cross-brand compatibility, combined with factory-level quality standards, is why boaters worldwide have made Quicksilver their go-to source for maintenance and repair.</p><p>The Quicksilver catalog spans the full spectrum of marine maintenance needs. At its core are <a href="/7456-quicksilver-fuel-pump-6244">fuel pumps</a> and complete fuel pump and carburetor kit solutions that keep fuel delivery systems operating reliably under demanding on-water conditions. For those needing a broader fuel system overhaul, Quicksilver&apos;s lineup of <a href="/7456-quicksilver-fuel-pumps-201310">fuel pumps</a> covers outboard and sterndrive applications alike. Above the waterline, few components are as performance-critical as the prop, and Quicksilver&apos;s extensive range of <a href="/200673-propellers-quicksilver-7456">propellers</a> — from aluminum to stainless steel — gives boaters the ability to tune their vessel&apos;s performance to their exact needs. Rounding out the drivetrain, Quicksilver also offers precision-engineered <a href="/7456-quicksilver-drives-gearcases-transoms-200346">drives, gearcases, and transom components</a> that are essential for maintaining the mechanical heart of sterndrive and inboard systems.</p><p>Quicksilver products undergo rigorous testing and engineering validation — the result of decades of R&amp;D conducted alongside Mercury Marine&apos;s own engineering teams. The brand&apos;s commitment to quality means that each part meets or exceeds OEM specifications, giving do-it-yourself boaters and marine technicians alike the confidence that a Quicksilver repair will hold up season after season. From freshwater lakes to demanding saltwater environments, Quicksilver is built for wherever your adventures take you.</p>

Part Number

865066
09/12/2036 2:04 PM
Sale Price

$12.70

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 865066 is an OEM heat exchanger seal designed to seal the connection between the heat exchanger and crossover assembly in MerCruiser marine engine cooling systems. This genuine Mercury Marine seal is a critical component in closed cooling systems, ensuring proper sealing to prevent coolant leaks and maintain optimal engine temperature regulation.

Key Features:

  • Genuine OEM Quicksilver/Mercury Marine part for reliable fit and performance
  • Designed for MerCruiser 496 8.1L V8 GM engines
  • Seals heat exchanger to crossover connection
  • Essential maintenance component for closed cooling systems
  • Prevents coolant leaks and ensures proper cooling system operation

This seal is a factory replacement part that helps maintain the integrity of your marine engine's cooling system. Regular inspection and replacement of cooling system seals is important for preventing overheating and extending engine life.

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

Great price and quick delivery. The only issue I had was that I did not receive a shipping confirmation and tracking info. I had to contact customer service and they weren't even clear on shipping info. While I was waiting for a reply, the tire showed up at my house. I received shipping confirmation the day after it arrived.

fast and efficient checkout.

Hard to find belts

Part came in quickly, quality was outstanding, and install was very easy

Really fast way to shop and great price

Great! It was shipped quickly and I received quickly!

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