Martyr CMX03AL Aluminum Streamline Shaft Anode – 1" Shaft | Stainless Allen Screw | Saltwater & Brackish
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You have 30 days to request a return. All sale items are final sale.
Martyr CMX03AL Aluminum Streamline Shaft Anode
Keep your 1" prop shaft protected from galvanic corrosion with this precision-cast aluminum streamline shaft anode. The low-drag, hydrodynamic profile minimizes water resistance while delivering reliable sacrificial protection — ideal for saltwater and brackish water environments where aluminum outperforms zinc.
Secured with a stainless steel Allen head screw for a solid, rattle-free fit that stays put underway. A straightforward upgrade that protects your shaft, cutlass bearing, and running gear season after season.
Compatible Applications
- 1" (25mm) diameter prop shafts
- Saltwater and brackish water use
- Inboard and inboard/outboard (I/O) vessels
- Replaces OEM shaft anodes on most standard 1" shaft configurations
Specifications
- Part Number: CMX03AL
- SKU: 194-CMX03AL
- Material: Aluminum alloy (sacrificial)
- Shaft Diameter: 1" (25mm)
- Fastener: Stainless steel Allen head screw
- Profile: Streamlined / hydrodynamic
- Best For: Saltwater & brackish water
Parts Desk Insights
The CMX03AL is the go-to aluminum shaft anode for 1" shafts in saltwater and brackish conditions. Aluminum anodes are the preferred choice over zinc when operating in brackish or mixed-salinity water — zinc can passivate in lower-salinity environments and lose effectiveness, while aluminum remains active across a wider salinity range. If you're in freshwater, consider the CMX03M Magnesium version instead. For the zinc equivalent in saltwater, see the CMX03 Zinc Shaft Anode.
Also available in adjacent sizes: CMX02AL – 7/8" Aluminum | CMX04AL – 1-1/8" Aluminum
Shipping information
In-stock and OEM parts: ship same or next business day.
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.