Martyr CMR05M Rudder/Trim Tab Zinc Anode – Allen Head
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You have 30 days to request a return. All sale items are final sale.
Martyr CMR05M Rudder & Trim Tab Zinc Anode
Keep your rudder and trim tab protected from galvanic corrosion with this purpose-built zinc anode from Martyr. The CMR05M is shaped to mount flush against rudder blades and trim tabs, delivering reliable sacrificial protection in saltwater and brackish water environments. A stainless steel Allen head screw is included for a secure, tool-friendly installation.
Features
- Sacrificial zinc alloy construction for galvanic corrosion protection
- Contoured profile fits rudder blades and trim tabs
- Includes stainless steel Allen head mounting screw
- Suitable for saltwater and brackish water use
- Replaces depleted anodes to extend the life of underwater running gear
Compatibility
Designed for use on rudders and trim tabs across a wide range of inboard, sterndrive, and outboard-powered vessels. Verify mounting hole dimensions against your existing anode before ordering.
Related Products
- Sierra Zinc Trim Tab Anode – Mercury Mariner
- Zinc Rudder Anode 2-13/16" – Marine Corrosion Protection
- Zinc Pencil Anode 3/8" NPT – CMT-E1
- Martyr Zinc Diver's Dream Hull Anode – CMT-DIVERZ
Parts Desk Insights
Best use case: Ideal for customers replacing worn or depleted anodes on rudders and trim tabs during seasonal haul-outs or annual bottom jobs. This is a go-to anode for inboard and sterndrive vessels where the rudder and trim tab are exposed to saltwater. Recommend pairing with a full running gear anode inspection — customers replacing this anode often also need shaft, hull, or trim tab anodes. Cross-sell opportunity with hull anodes and pencil anodes for a complete corrosion protection package.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.