My Account
Shopping Cart

Sierra 18-6011A Aluminum Trim Tab Anode for Mercury & MerCruiser

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

18-6011A
08/05/2036 1:00 AM
Sale Price

$18.19

In Stock (5)

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 18-6011A is a replacement aluminum trim tab anode engineered to protect outboard and sterndrive components from galvanic corrosion. Designed as a direct OEM replacement, this sacrificial anode is constructed from a specially formulated aluminum alloy that corrodes preferentially, shielding metal drive components from the damaging effects of electrolysis in the water.

Key Features:

  • Aluminum alloy construction — ideal for use in saltwater and brackish water environments, and outperforms zinc in mixed-water conditions
  • Direct OEM replacement — replaces Mercury/Mariner part numbers 31640, 31640A1, 31640Q4, and Honda 41107-ZW1-003ZA
  • Sacrificial protection — actively directs corrosion away from shafts, propellers, rudders, and drive components
  • Meets or exceeds OEM specifications — engineered to Sierra's high-performance marine standards

OEM Cross-Reference Part Numbers:

  • Mercury/Mariner: 31640, 31640A1, 31640Q4
  • Honda: 41107-ZW1-003ZA

Sierra International is a market leader in aftermarket marine engine parts, supplying OEM manufacturers and boat builders with quality components every day. The 18-6011A aluminum anode is the preferred choice for boaters who operate in both salt and brackish water, providing reliable, season-long corrosion protection.

.

Very good, Fast, No Problems at all.

By far the fastest shipping and best prices on the web. Ordered it one day and it showed literally the next. Will definitely be buying from again!

good

Easy to place order.

Don't know if it accepted the coupon code but shopping was easy.

First time shopper

Quick

Very friendly customer service! They also shipped my radiator out very quickly. I will definetly be ordering from autoplicity again!

Simple and friendly

These guys are really quick with shipping out the product. Very satisfied with this site so far. Cant wait for my product!

Best Price around. Ordered Friday Shipped Monday. Thanks

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