Sierra Zinc Trim Tab Anode SIE-23-6401 Mercury Mariner
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Sierra 23-6401 (SIE-23-6401) is a marine-grade zinc trim tab anode designed as a direct aftermarket replacement for Mercury and Mariner outboard gearcase trim tabs. It provides reliable sacrificial cathodic protection for gearcase components in saltwater environments at an aftermarket price point.
Key Features
- Sierra Marine aftermarket replacement anode
- Zinc alloy — proven protection for saltwater applications
- Direct replacement for Mercury / Mariner trim tab anodes
- Protects gearcase from galvanic corrosion
- Cost-effective alternative to OEM Mercury anodes
- Easy installation and replacement at service interval
Engine Compatibility
Designed as a replacement for Mercury and Mariner outboard trim tab anodes. Always verify fitment by engine model and serial number.
✔ Common OEM cross-references:
- Mercury / Quicksilver: 818298 series
- Verify mounting hole pattern and anode profile before ordering
Serial Number Fitment Notice
- Confirm Sierra part number 23-6401 against your engine model
- Verify trim tab mounting location and bolt spacing
- Check anode shape matches existing trim tab profile
When This Part Needs Replacement
- Anode is 50% or more consumed
- Visible corrosion on gearcase trim tab area
- Annual service or seasonal haul-out
Installation Notes
- Mount to clean, bare metal surface
- Do not paint the anode
- Ensure proper electrical contact with gearcase
- Torque to specification
Alternate / Cross-Reference Part Numbers
- Sierra Marine: 23-6401 / SIE-23-6401
- Mercury / Quicksilver OEM equivalent: 818298 series
- Aluminum equivalent available for brackish/mixed water
Parts Desk Insight
Sierra is a well-established aftermarket brand for Mercury applications. If you’re running strictly saltwater, zinc is the traditional and proven choice. For mixed or brackish water, consider the aluminum equivalent for longer service life.
Shipping
Ships in 1–3 business days for fast Canada wide shipping. ⚓
Shipping information
In-stock OEM parts: ship same or next business day.
Other in-stock products: ship within 1–3 business days.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.