My Account
Shopping Cart

Quicksilver 864908A1 6-Inch Dry Joint Riser Kit Standard Raw Water Cooling MerCruiser

Manufacturer

Quicksilver

<h3>About Quicksilver Marine Parts &amp; Accessories</h3><p>Quicksilver is the genuine OEM parts and accessories brand behind some of the most trusted names on the water. As the official parts arm of Mercury Marine, Quicksilver products are engineered to the exact tolerances and specifications used in the original manufacturing process — meaning every component fits, functions, and lasts the way your engine and drivetrain were designed to perform. Whether you're keeping a weekend fishing boat running strong or maintaining a performance stern drive for serious offshore work, Quicksilver delivers the confidence that comes from factory-level engineering.</p><h3>A Legacy Built on the Water</h3><p>Mercury Marine has been a cornerstone of recreational and commercial boating for decades, and Quicksilver exists to keep that legacy alive on the service and replacement side. The brand covers an expansive catalog of over 2,000 products, touching virtually every serviceable system on a Mercury-powered vessel. From consumables and fluids to precision-machined mechanical components, Quicksilver parts are held to the same quality standards as the engines they support — no guesswork required.</p><h3>Precision-Engineered Marine Components</h3><p>One of Quicksilver's most critical product areas is its line of <a href="/7456-quicksilver-fuel-pumps-201310">fuel pumps</a>. Marine fuel systems operate in uniquely demanding conditions — vibration, temperature swings, ethanol-blended fuels, and the corrosive effects of saltwater environments all take a toll. Quicksilver fuel pumps are built to handle these stresses without compromise, ensuring consistent fuel delivery and reliable starts whether you're on a freshwater lake or miles offshore in saltwater.</p><p>On the performance side, Quicksilver's <a href="/200673-propellers-quicksilver-7456">propellers</a> are among the most widely specified in the marine industry. Designed with input from Mercury Marine's engineering teams, Quicksilver propellers are available in a wide range of diameters, pitches, and blade configurations to match virtually any Mercury outboard or stern drive application. The right propeller selection can dramatically affect top speed, fuel efficiency, hole shot, and handling — and Quicksilver's catalog makes it straightforward to find the correct match for your specific setup.</p><p>Keeping those propellers performing at their best requires quality hardware and replacement components. Quicksilver's <a href="/7456-quicksilver-propeller-parts-accessories-200817">propeller parts and accessories</a> — including thrust washers, spline shafts, prop nuts, and hub kits — ensure a secure, properly aligned installation. Using OEM-spec hardware here isn't just a convenience; it directly affects propeller performance and longevity.</p><p>For boaters maintaining or rebuilding their sterndrive systems, Quicksilver's <a href="/7456-quicksilver-drives-gearcases-transoms-200346">drives, gearcases, and transoms</a> components represent the gold standard. These assemblies transfer engine power to the propeller and handle enormous loads in a wet, corrosive environment. Quicksilver gearcase and transom parts are manufactured to the precise specifications of MerCruiser and Mercury sterndrive systems, making them the first choice for both professional marine technicians and knowledgeable DIY boaters.</p><h3>Why Choose Quicksilver?</h3><ul style="list-style:disc"><li><strong>OEM Engineering:</strong> Parts designed to factory specifications for Mercury and MerCruiser applications</li><li><strong>Wide Coverage:</strong> Over 2,000 products spanning virtually every serviceable system</li><li><strong>Proven Reliability:</strong> Trusted by professional marine technicians and performance boaters worldwide</li><li><strong>Proper Fit:</strong> Eliminates the guesswork and fitment issues common with aftermarket alternatives</li></ul><p>From the fuel system to the prop shaft, Quicksilver is the smart choice when you want genuine performance and peace of mind on the water.</p>

Part Number

864908A 1
09/22/2036 6:35 AM
Sale Price

$841.50

In Stock (10)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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 864908A 1 is a genuine OEM 6-inch exhaust riser extension kit designed for MerCruiser stern drive engines using dry joint exhaust manifolds with standard (raw water) cooling. This kit raises the exhaust elbow height by 6 inches, helping to reduce the risk of water backing up through the exhaust system and into the engine.

Engineered specifically for 14° dry joint risers where the bolt is either 5-3/4" or 7-1/2" long, this kit is the correct replacement for "Warm Riser" raw water-cooled applications. Compatible engines include the 350 MAG, 357 MAG, 383 MAG Stroker, 4.3L, 5.0L, 5.7L, and 6.2L V-6 and V-8 MerCruiser configurations using 7° or 14° risers.

Kit Includes:

  • 2 × 6" Cast Iron Spacer Risers
  • 2 × Restricted Gaskets
  • 2 × Full Flow Gaskets
  • 8 × .375-16 × 7.50" Bolts
  • 8 × .375-16 × 1.00" Bolts
  • 8 × .375-16 Washers
  • 6 × .250-20 × .625" Hex Screws
  • 2 × .250-20 × .375" Hex Screws
  • 4 × Pipe Plugs
  • 2 × Brackets

Key Features:

  • Genuine OEM Quicksilver / Mercury Marine part
  • 6-inch height extension for dry joint exhaust manifold risers
  • Designed for standard (raw water) cooling — RWC configuration
  • Fits 2004–2016 MCM V-6 and 2002–2016 MCM V-8 Non-EC engines, and MIE V-8 Non-EC engines
  • All hardware and gaskets included for raw water-cooled installations
  • Note: Additional block-off gaskets required for closed cooling (fresh water) applications

Replace gaskets in the exact configuration they were removed from to ensure a proper seal. Genuine Quicksilver exhaust riser kits meet Mercury Marine's original engineering standards for reliable, long-lasting performance.

easy peasy

fast service and got what I ordered.

Ordering online was easy. Got exactly what I ordered. Just living in Hawaii shipping is a bit slow on bigger items, but that's normal.

Good experience

Good

All good so far

Very good price on a part that is hard to find

Good price, easy to calculate shipping without going through checkout. Prompt tracking info and shipping.

Thanks Autoplicity you had the best prices I could find, fast shipping, and everything I ordered was exactly what I was looking for! Great Customer Service!

Price was much lower than any other parts dealer. Even with standard shipping, the parts arrived in a couple of days. Would use autoplicity again. Absolutely no problems.

Awesome prices. Best around.

Thanks - Great Product. Fast Shipping. Plus they answer the phones!

Prompt shipping, good prices. Will buy from again

Easy and quick. Great price, too!

Awesome Products!

Very easy to navigate web site. Received my order in excellent condition in a timely manner. Recommend Autoplicity as a company with which to conduct business.

Easy to order

really easy

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