Mercruiser Magnesium Bearing Carrier Anode | Martyr CM806105M Magnesium Martyr anode protects bearing carrier from corrosion in fresh water lakes and rivers. Mercruiser bearing carrier anode For Alpha I Gen II Magnesium anode for use in fresh water applications Magnesium aftermarket direct replacement for Mercruiser 806105Q1 For brackish water see aluminum anode p/n CM806105A For salt water see zinc anode p/n CM806105Z