Sierra 118-6011A Aluminum Trim Tab Anode for Mercury MerCruiser Outboard

The Sierra 118-6011A is a replacement aluminum trim tab anode designed to provide superior corrosion protection for your marine engine. This sacrificial anode protects critical engine components from galvanic corrosion by corroding preferentially to more expensive metal parts like propellers, trim tabs, and drive units.

Key Features:

• Constructed of specially-formulated aluminum alloy for optimal corrosion protection
• Ideal for brackish water environments and boats used in both fresh and saltwater
• Fits most Mercury/Mariner outboards 35 HP and above
• Compatible with MerCruiser R/MR/Alpha One drives (sterndrive and transom assembly 1983-90 and prior drives)
• Also fits Mercury/Mariner inline 3, 4, and 6 cylinder V6 outboards

OEM Cross-References:

• Mercury Marine: 31640, 316403, 316404, 31640A1, 31640A2, 31640A4, 97-31640Q4
• MerCruiser Stern Drive: 31640, 316404, 31640A1, 97-31640Q4
• Honda Outboard: 41107-ZW1-003ZA

Aluminum anodes offer superior versatility compared to zinc or magnesium anodes, providing effective protection in saltwater while also working well in brackish water conditions. This makes them an excellent all-around choice for boats that operate in multiple water environments.