Mercruiser & Mercury 97-31640Q4 Anode Kit Martyr CM31640KIT

Suits Mercury / Mercruiser applications:

• Most Mercury/Mariner outboards 35 HP & above
  
• Mercruiser Alpha 1 Gen 1 sterndrives (1983-90)

Kit includes:

1 x 31640Q4 trim tab anode (CM31640)

1 x fastening hardware & instructions

Anode material options:

• Aluminum (for use in salt and brackish water)
• Magnesium (for use in freshwater)

Why aluminum instead of zinc for salt and brackish water?

• Performs at least 5% better than traditional zinc anodes in salt water;
• Protects 50% longer than traditional zinc anodes; 
• Aluminum is environmentally friendly - it contains 0% Cadmium, a toxic material found in traditional zinc anodes; 
• Meets the US Military Specification MIL-DTL 24779C(SH);
• Weighs 50% less than traditional zinc anodes;
• Are the only anodes proven to be effective in Salt & Brackish water
• Easy installation