Zinc Engine Anode E0 5/16" UNC CMT-EZ0
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The CMT-EZ0 is a marine-grade zinc pencil engine anode, E0 style with 5/16" UNC thread, providing sacrificial cathodic protection for internal engine cooling passages and heat exchangers in saltwater applications. This is the anode rod only — reuses the existing brass plug housing.
Key Features
- Zinc alloy — optimized for saltwater corrosion protection
- E0 pencil anode with 5/16" UNC thread — smallest in the EZ series
- Anode rod only — reuses existing brass plug
- Protects heat exchangers, cooling passages, and engine block
- Direct replacement for E0-style pencil anodes
- Easy inspection and replacement during routine service
Engine Compatibility
Designed for inboard marine engines with E0-style pencil anode ports. Commonly used on:
- MerCruiser
- Volvo Penta
- Yanmar
- Crusader
- Westerbeke / Universal
- Other heat exchanger-cooled inboard engines
✔ Installed in:
- Heat exchangers
- Engine block cooling ports
- Cooling system passages
Serial Number Fitment Notice
- Confirm thread size: 5/16" UNC
- Verify anode length and diameter match existing E0 anode
- Confirm application requires anode-only (not complete plug assembly)
When This Part Needs Replacement
- Anode is 50% or more consumed
- Excessive scaling or buildup on anode body
- Reduced cooling efficiency or overheating symptoms
- Routine maintenance interval
Installation Notes
- Remove plug and inspect anode regularly
- Ensure clean threads and proper sealing on plug
- Do not over-tighten — risk of thread damage
- Do not use thread sealant that could insulate the anode
- Replace before full depletion to avoid debris in cooling system
Alternate / Cross-Reference Part Numbers
- Camp Company: CMT-EZ0
- Martyr: CMEZ0
- Common reference: E-0 / E0Z
- Complete assembly (with plug) versions available
- Larger sizes: EZ2 (7/16" UNC), EZ3 (1/2" UNC)
Parts Desk Insight
The E0 is the smallest pencil anode in the EZ series — found in tighter cooling ports on smaller inboard engines. Because of its small mass, it depletes faster than larger anodes. Check it at every oil change and keep a spare on board. Don’t let it disappear completely — debris in the cooling system is an expensive problem.
Shipping
Ships in 1–3 business days 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.