Zinc OMC Block Anode CMT-393023Z
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You have 30 days to request a return. All sale items are final sale.
The CMT-393023Z is a zinc block anode designed for OMC, Johnson, and Evinrude outboard and sterndrive gearcases, providing essential protection against galvanic corrosion in saltwater environments.
This compact block-style anode mounts directly to the gearcase, protecting critical aluminum components by sacrificing itself during electrolysis. Zinc construction makes it the preferred choice for full saltwater use, ensuring reliable and consistent corrosion protection.
Key Features
- OEM-style block anode design for OMC gearcases
- Marine-grade zinc construction
- Protects gearcase and internal components
- Compact, direct-fit replacement
- Ideal for saltwater applications
- Proven, traditional corrosion protection
Engine Compatibility
Commonly used on:
- OMC sterndrives and stringer drives
- Johnson outboards: 50–140 HP range
- Evinrude outboards: 50–200 HP range
✔ Fits a wide range of classic OMC platforms
✔ Also used on Cobra and similar gearcase designs
Serial Number Fitment Notice
Always confirm:
- OEM reference: 393023 / 436745
- Mounting location and bolt pattern
- Gearcase compatibility
Correct fitment is critical for proper protection and installation.
When This Part Needs Replacement
- Anode is 50% or more consumed
- Uneven or rapid corrosion
- Visible corrosion on gearcase
- Routine maintenance or haul-out
Installation Notes
- Mount to clean, bare metal surface
- Ensure full contact with gearcase
- Do not paint the anode
- Tighten securely with proper hardware
- Inspect regularly in saltwater use
Alternate / Cross-Reference Part Numbers
- Camp Company: CMT-393023Z
- Martyr: CM393023Z
- OMC / BRP: 393023, 436745
- Aluminum equivalent available for brackish water
- Magnesium version available for freshwater
Parts Desk Insight
This is one of the most common small gearcase anodes on older OMC platforms. Because of its size, it tends to wear faster—so it’s a good idea to check it more frequently than larger hull anodes, especially on boats that stay in the water.
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.