Zinc OMC Block Anode CMT-984547Z
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The CMT-984547Z is a zinc block anode designed for OMC Cobra sterndrives, providing sacrificial corrosion protection for the transom, gimbal plate, and surrounding components. It is a direct replacement for OEM part 984547, widely used on OMC systems from the late 1980s.
Made from high-purity zinc alloy, this anode is engineered for saltwater environments, where it corrodes in place of critical drive components to prevent expensive damage.
Key Features
- Direct replacement for OMC / BRP 984547
- Marine-grade zinc (saltwater optimized)
- Block-style anode for transom/gimbal protection
- Pressure die-cast to MIL-spec alloy standards
- Durable, long-lasting corrosion protection
Application / Compatibility
Designed for:
- OMC Cobra sterndrives (approx. 1986–1989)
- Johnson / Evinrude / BRP applications
✔ Installed on:
- Transom mount / gimbal plate
- Sterndrive mounting assembly
✔ Protects:
- Gimbal housing
- Transom plate
- Adjacent underwater metals
Serial Number Fitment Notice
Always confirm:
- OEM reference (984547)
- Drive model and year
- Mounting hole spacing and dimensions
Typical dimensions (approx.):
- Length: ~3.8"
- Width: ~4.5"
- Height: ~1.24"
When This Part Needs Replacement
- Anode is 50% or more consumed
- Uneven wear or pitting
- Loss of thickness
- Routine seasonal inspection
Installation Notes
- Install on clean, bare metal surface
- Ensure tight, even mounting
- Do not paint the anode
- Replace mounting hardware if corroded
- Inspect regularly in saltwater use
Alternate / Superseded Part Numbers
- OMC / BRP: 984547 / 0984547
- Camp Company: CMT-984547Z
- Martyr: CM984547Z
- Cross references: 2422, 00916
- Aluminum version: CMT-984547A
- Magnesium version available
Parts Desk Insight
This is a critical protection anode on OMC Cobra drives. If it’s gone, corrosion goes straight into the transom assembly—one of the most expensive repairs on these systems. Always replace it proactively during service.
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.