Martyr Aluminum Horseshoe Anode Mercury Gen 2 Outdrive CMT-806189A
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The Martyr CMT-806189A is an aluminum horseshoe-style anode designed for select Mercury MerCruiser Gen 2 sterndrive applications. It is commonly described as a lift-ram / trim cylinder ram-end anode for Alpha One Gen II drives and is used to help protect the drive from galvanic corrosion. Published dimensions are about 49 mm x 44 mm x 14 mm with an approximately 5 mm inner diameter.
This is an aluminum anode, making it the correct material choice for saltwater, brackish, and mixed-water use, and Mercury’s OEM 806189T1 listing also states the aluminum version is intended to protect the trim cylinder arm/rod on MerCruiser Alpha One Gen II drives.
Key Features
- Aluminum horseshoe / lift-ram anode
- Fits Mercury MerCruiser Alpha One Gen II applications
- Protects the trim cylinder arm / ram end from galvanic corrosion
- Approx. dimensions: 49 mm x 44 mm x 14 mm
- Common Martyr reference: CM806189A
- Common Mercury references include 806189A / 806189Q1 / 806189T1
Engine Compatibility
Commonly listed for MerCruiser Alpha One Gen II drives, including 1991 and newer Alpha One Gen II references in current aftermarket fitment listings. Some sources also associate this anode pattern with certain Bravo XR One / XR Sportmaster / XR Three applications, but the strongest supported fitment is Alpha One Gen II. Confirm against your exact drive model before ordering.
Serial Number Fitment Notice
Please confirm fitment using your Mercury MerCruiser drive serial number and current anode shape before ordering. Matching by serial number is the safest method, especially on older drives or units that may have had previous service or mixed replacement parts. The strongest supported OEM replacement references are 806189Q1 / 806189T1.
When This Part Needs Replacement
Replace this anode when it becomes heavily wasted, pitted, cracked, loose, or reduced enough that it can no longer provide effective sacrificial protection. Mercury recommends inspecting anodes annually and replacing them when corrosion or pitting is visible.
Installation Notes
Install on a clean bare-metal contact surface and do not paint the anode. Current fitment references note this part installs on the trim cylinder ram end / lift ram. Some aftermarket listings state mounting hardware is not included, while Mercury’s OEM 806189T1 listing says attaching hardware is included with that OEM part number, so included hardware should be verified against the exact source listing.
Alternate / Superseded Part Numbers
- CM806189A
- 806189A
- 806189Q1
- 806189T1
- 00817AL
- 710-806189Q1
Parts Desk Insight
This small horseshoe anode protects a much more expensive trim and drive assembly. A useful detail here is that the 806189 pattern commonly appears in complete Alpha One Gen II anode kits as a pair, because both trim rams need protection and they often wear at a similar rate.
Shipping
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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
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