My Account
Shopping Cart

Sierra 18-6080A Aluminum Sacrificial Anode for MerCruiser Alpha One Gen II Stern Drives

Manufacturer

Sierra

<p>For nearly six decades, Sierra has established itself as one of the marine industry's most trusted names in aftermarket engine and drive parts. Founded as a specialized marine parts manufacturer, Sierra has grown into a comprehensive supplier of replacement components, instrumentation, and accessories for both recreational and commercial boating applications. Operating from their 300,000-square-foot distribution center in Litchfield, Illinois, Sierra serves boat owners and marine technicians worldwide with an extensive catalog of parts engineered specifically for the harsh saltwater environment.</p><h3>Marine Engine Excellence</h3><p>Sierra's reputation was built on delivering precision-engineered internal engine components and drive system parts that meet or exceed OEM specifications. Their <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> provide critical sealing solutions for inboard and outboard motors, while their <a href="/7570-sierra-engine-complete-assembly-15341">engine complete assemblies</a> offer comprehensive replacement options for major overhauls. Each component undergoes rigorous testing to ensure reliability in demanding marine conditions, from corrosion resistance to temperature cycling performance.</p><h3>Instrumentation and Monitoring Systems</h3><p>Accurate instrumentation is essential for boat operators to monitor engine health and prevent costly breakdowns on the water. Sierra's comprehensive line of <a href="/7570-sierra-gauges-200483">gauges</a> includes everything from fuel pressure and temperature indicators to voltmeters and trim gauges, all designed with marine-grade materials that withstand vibration, moisture, and UV exposure. Their <a href="/7570-sierra-tachometer-gauge-1488">tachometer gauges</a> deliver precise RPM readings critical for optimizing engine performance and fuel efficiency. Supporting these instruments, Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> ensure proper signal conditioning and accurate readings across various sensor types and engine configurations.</p><h3>Expanded Product Portfolio</h3><p>In 2022, Sierra significantly broadened its scope beyond traditional marine engine parts to encompass a wider range of boating accessories and even outdoor power equipment components. This strategic expansion brought established marine brands like Shields and Moeller under the Sierra umbrella, creating a one-stop resource for marine maintenance and replacement parts. The company now offers fuel systems, electrical components, battery charging solutions, and NMEA electronics alongside their traditional engine parts lineup.</p><h3>Quality Backed by Industry-Leading Warranties</h3><p>What sets Sierra apart in the crowded aftermarket marine parts market is their commitment to standing behind every component they manufacture. Their warranty coverage extends beyond simple part replacement—it includes shop labor, haul-out fees, towing charges, and related incidental costs should a warrantied part fail. This comprehensive protection reflects the company's confidence in their manufacturing processes and quality control standards. For boat owners facing repairs far from shore or mechanics working on customer vessels, this peace of mind is invaluable. Whether you're maintaining an outboard motor, rebuilding an inboard engine, or upgrading your boat's instrumentation, Sierra's decades of marine industry experience and commitment to quality make them a reliable choice for keeping your vessel running at peak performance.</p>

Part Number

18-6080A
08/06/2036 12:17 PM
Sale Price

$31.51

1 left at this price

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 Sierra 18-6080A is a replacement aluminum sacrificial anode designed to protect MerCruiser Alpha One Gen II stern drives from galvanic corrosion, rust, and electrolysis damage. Engineered to meet or exceed OEM specifications, this anode is a direct replacement for Mercury Marine OEM part numbers 821629T1, 821629A1, and 821629Q1.

Sacrificial anodes are a critical part of any marine maintenance routine — they corrode in place of your expensive drivetrain components, extending the life of your stern drive. Regular replacement helps prevent costly corrosion damage to shafts, propellers, and drive housings.

Why Choose Aluminum?

Aluminum anodes offer superior versatility compared to zinc. The specially formulated aluminum alloy outperforms zinc in saltwater environments and provides reliable protection in brackish and tidal waters as well. If your vessel operates across multiple water environments, aluminum is the recommended all-around choice.

Key Features:

  • Material: Aluminum alloy — suitable for saltwater, brackish water, and tidal environments
  • Designed for MerCruiser Alpha One Gen II stern drives (1991 & up)
  • Direct OEM replacement for Mercury Marine 821629T1, 821629A1, 821629Q1
  • Compatible with MerCruiser Stern Drive assemblies 815933A1, 821629A1, 97-821629Q1
  • Cross-references: GLM 12711, 47-6080
  • Meets or exceeds original equipment specifications
  • Replacement anode only (hardware not included)

Keep your stern drive protected season after season with routine anode replacement using Sierra marine-grade components.

I did a search with the part number and decided to give your company a try.

Great and fast hopefully shipping is fast as well

great so far.

Great experience.

My shopping experience has been great...it was very easy to find the part I was looking for.

Server errors during checkout. I hope I wasn't charged more than once

Because they had what I wanted with both cost and shipping price that I was willing to pay for.

Great product at a very reasonable price. Driver could have helped lower package.

so far so good

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