Martyr CM6H14525102Z Yamaha Transom Bar Anode — Zinc | Salt Water
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Martyr CM6H14525102Z — Yamaha Transom Bar Anode | Zinc | Salt Water
Part Number: CM6H14525102Z (SKU: 194-CM6H14525102Z)
Brand: Martyr Anodes
Official Product Type: Transom Bar Sacrificial Anode — Zinc
Replaces OEM: Yamaha 6H1-45251-02
Supersedes: No known superseded Martyr number
Replaced By: CM6H14525102Z is the current active part number
The Martyr CM6H14525102Z is a direct-replacement zinc sacrificial anode for the transom bar position on compatible Yamaha outboard motors. It mounts to the anti-cavitation plate / transom bracket area and protects the lower unit and surrounding metal components from galvanic corrosion. Zinc alloy construction makes this the correct choice for salt water use.
Compatible Applications
- Yamaha outboard motors using OEM anode reference 6H1-45251-02
- Transom bar / anti-cavitation plate anode position
- Salt water use only (see aluminum alternative for brackish water)
Confirm fitment against your engine model and serial number before ordering. Yamaha uses multiple transom bar anode configurations across its outboard range.
System & Location
Cathodic protection system — transom bar / lower unit. Mounts at the transom bar or anti-cavitation plate position on the outboard. This is a bolt-on replacement anode; no housing or bracket required.
Anode Material Guide
- Zinc (this anode): Salt water ✓
- Aluminum: Salt water & brackish water — see Martyr CM6H14525102A Aluminum Transom Bar Anode
- Magnesium: Fresh water — contact us to check availability
Kit Contents
- One (1) zinc transom bar anode
- Mounting hardware may or may not be included — reuse existing fasteners if not supplied
Dimensions & Weight
- Weight: Approx. 280 g / 0.62 lb (estimated)
- Bar / plate form factor; direct bolt-on replacement for OEM position
Service Interval
Inspect at every haul-out or at least once per season. Replace when the anode has been consumed to approximately 50% of its original mass. Do not allow the anode to deplete fully — an exhausted anode provides no protection and leaves the lower unit vulnerable to galvanic attack.
Installation Notes
- Clean the mounting surface before installation to ensure direct metal-to-metal contact
- Do not apply paint, grease, or sealant between the anode and the mounting surface
- Torque mounting fasteners to specification; a loose anode can be lost underway
- Use zinc anodes in salt water only — zinc does not perform correctly in fresh or brackish water
Technical FAQ
Q: What Yamaha OEM part does this replace?
This anode replaces Yamaha OEM reference 6H1-45251-02. Confirm this number matches your engine's parts diagram before ordering.
Q: Why zinc instead of aluminum for salt water?
Both zinc and aluminum work in salt water. Aluminum is generally more electrochemically efficient, but zinc is a proven traditional choice and is specified by many marinas and boatyards. If you operate in brackish water as well as salt water, the aluminum version (CM6H14525102A) is the better choice.
Q: How do I know when to replace it?
Replace when approximately half the anode mass has been consumed. A fully depleted anode offers no protection. Inspect at every haul-out.
Q: Do I need to replace all anodes at the same time?
It is best practice to replace all anodes on the motor at the same service interval to maintain consistent protection across all positions.
Related Parts
Parts Desk Insights
The transom bar anode is one of the most frequently overlooked positions on Yamaha outboards — it sits in a high-exposure location and tends to deplete faster than anodes on the lower unit. The most common issue is customers waiting until the anode is completely gone before replacing it, at which point corrosion damage to the bracket or cavitation plate may already be underway. For salt water use, zinc is a reliable choice; for anyone running in both salt and brackish water, the aluminum version offers slightly better coverage across both environments.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.