Zinc Shaft Anode 4" CMT-X17
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The CMT-X17 is a marine-grade zinc clamp-on shaft anode sized for 4" diameter propeller shafts, providing heavy-duty sacrificial cathodic protection for propeller shafts, shaft couplings, and associated underwater hardware on larger vessels in saltwater environments.
Key Features
- High-purity zinc alloy ā proven saltwater corrosion protection
- 4" bore ā designed for large-diameter propeller shafts
- Clamp-on design ā no shaft modification required
- Protects shaft, coupling, and adjacent underwater metals
- Heavy-duty construction for commercial and large recreational vessels
- Split design for easy installation without removing shaft
Application / Compatibility
Designed for:
- Vessels with 4" diameter propeller shafts
- Inboard diesel and gasoline powered vessels
- Commercial, workboat, and large recreational applications
ā Protects:
- Propeller shaft
- Shaft coupling and keyway
- Cutlass bearing housing
- Adjacent bonded underwater metals
Serial Number Fitment Notice
- Confirm shaft diameter: 4" (101.6mm)
- Verify clamp bore fits shaft without excessive play
- Check anode length and mass is appropriate for vessel size
When This Part Needs Replacement
- Anode is 50% or more consumed
- Uneven or accelerated wear
- Visible corrosion on shaft or coupling
- Annual haul-out or seasonal service
Installation Notes
- Clean shaft surface thoroughly before installation
- Ensure bare metal-to-metal contact ā no paint or coatings under anode
- Tighten clamp bolts evenly and securely
- Do not paint the anode surface
- Position anode away from propeller to avoid interference
- Inspect bonding system if uneven wear occurs
Alternate / Cross-Reference Part Numbers
- Camp Company: CMT-X17
- Martyr: CMX17
- Aluminum equivalent available for brackish/mixed water: CMT-X17A
- Magnesium version available for freshwater
Parts Desk Insight
A 4" shaft anode is a serious piece of hardware ā typically found on larger inboard vessels, commercial boats, and workboats. At this shaft size, proper anode mass is critical: undersized anodes deplete quickly and leave the shaft unprotected between haul-outs. Replace on schedule and inspect the bonding system annually.
Shipping
Ships in 1ā3 business days for fast Canada wide shipping. ā
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3ā4 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 ā 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 ā 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.