Martyr CMX05A Zinc Streamline Shaft Anode – 1-1/4" Extended Heavy | Saltwater
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Martyr CMX05A Zinc Streamline Shaft Anode – 1-1/4" Extended Heavy
The CMX05A is the extended heavy version of the standard 1-1/4" zinc streamline shaft anode — same shaft diameter and Allen head fastener, but with significantly more sacrificial mass. The extra material extends the service life between haulouts, making it the right choice for vessels that stay in the water for extended periods, operate in high-current or high-fouling environments, or simply need more protection than a standard anode can provide over a full season.
Compatible Applications
- 1-1/4" (32mm) diameter prop shafts
- Saltwater use
- Inboard and inboard/outboard (I/O) vessels
- Vessels with extended in-water periods between haulouts
- High-current or high-galvanic-activity marina environments
- Replaces OEM shaft anodes on standard 1-1/4" shaft configurations where additional mass is required
Specifications
- Part Number: CMX05A
- SKU: 194-CMX05A
- Material: Military-grade zinc alloy (sacrificial)
- Shaft Diameter: 1-1/4" (32mm)
- Fastener: Stainless steel Allen head screw
- Profile: Streamlined / hydrodynamic – extended heavy
- Best For: Saltwater, extended service intervals
- Weight: ~380 g
Standard vs. Extended Heavy
- CMX05 – 1-1/4" Zinc Standard – for typical annual haulout schedules
- CMX05A – 1-1/4" Zinc Extended Heavy – for extended in-water periods or high-activity environments
Also Available In
- CMX05M – 1-1/4" Magnesium (freshwater)
Adjacent Sizes – Zinc
Parts Desk Insights
The CMX05A is the right choice when a standard CMX05 isn’t lasting a full season. If you’re finding your shaft anode more than 50% consumed at haulout, or if your vessel lives in a slip year-round, the extended heavy version gives you the extra mass to stay protected between service visits without changing anything else about the installation. It fits the same 1-1/4" shaft bore and uses the same Allen head fastener — it’s a direct drop-in upgrade.
High-galvanic marinas — where shore power, mixed metals, and stray current are common — are the most frequent reason customers step up from the standard to the extended heavy. If you’re unsure which version is right for your situation, the rule of thumb is: if your standard anode is gone before your next haulout, go extended heavy.
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.