Martyr CMR03M Rod Anode, 3-3/4 Inch Magnesium
- Brand:
- Martyr
- Part no:
- CMR03M
Image: Powerboat Supply
Where to buy
View on Amazonpaid link
Specifications
- Material
- Magnesium
This is the Martyr CMR03M, a rod anode sold as the CMR3 in the 3-3/4 size. It is a magnesium anode, and the guide with it pairs magnesium with fresh water. The body is 3-3/4" dia. x 1/2". The same guide points zinc at salt water and aluminum at brackish water, so the metal is the first thing to match to the water the boat sits in.
Our take
The magnesium body of this CMR03M is the detail to check first, because the guide ties magnesium to fresh water and gives salt water to zinc. Match the metal to the water your boat lives in before you fit it.