Zinc Shaft Anode MDX-5 1-1/4"
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The MDX-5 is a zinc shaft anode designed for 1-1/4" propeller shafts, providing essential sacrificial protection for inboard running gear. Installed directly on the shaft, it corrodes first—protecting shafts, propellers, and nearby underwater metals from galvanic corrosion.
Constructed from marine-grade zinc alloy, it is specifically intended for saltwater environments, where zinc delivers stable and reliable corrosion protection.
Key Features
- Fits 1-1/4" shaft diameter
- Marine-grade high-purity zinc alloy
- Two-piece clamp-on design
- Provides 360° shaft protection
- Designed for saltwater use
- Easy installation and replacement
Application / Compatibility
Designed for:
- 1-1/4" propeller shafts
- Inboard propulsion systems
- Shaft-driven vessels
✔ Common on:
- Cruisers
- Sailboats
- Sportfish and workboats
✔ Protects:
- Propeller shafts
- Struts
- Prop hubs and surrounding metals
Serial Number Fitment Notice
Always confirm:
- Shaft diameter (1-1/4")
- Clearance between shaft and strut
- Proper anode length and OD
Correct sizing ensures proper clamping and electrical contact.
When This Part Needs Replacement
- Anode is 50% or more consumed
- Loose fit on shaft
- Uneven or rapid wear
- Routine haul-out inspection
Installation Notes
- Install on clean, bare shaft surface
- Tighten evenly for full contact
- Do not paint the anode
- Position clear of strut and propeller
- Recheck tightness after initial run
Alternate / Cross-Reference Part Numbers
- MDX-5 (aftermarket reference)
- Martyr equivalent available
- Aluminum version available for mixed water
- Magnesium version available for freshwater
Parts Desk Insight
Shaft anodes like the MDX-5 are your first line of defense for running gear. If they’re wearing quickly, it usually means they’re doing their job—but it can also indicate stray current issues worth checking.
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
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.