MG Duff CM43994M magnesium button anode for Mercury MerCruiser applications, providing sacrificial corrosion protection optimized for freshwater use.
- Part number: CM43994M
- Material: Magnesium — suited to freshwater environments
- Fits: Mercury/MerCruiser button-type anode locations
- Protects: sacrificial protection for lower units, gearcases and prop shafts
- Installation: button-style replacement; fits existing retaining hardware
- Supply: single anode
- Manufacturer: MG Duff
- OEM reference: Mercury 43994
- Compatibility: check your engine model and lower unit; fits many Mercury/MerCruiser models — see Mercury/MerCruiser anodes collection
- Dimensions & fastener: verify OEM button diameter, thickness and retaining fastener size before ordering
- Not for brackish or saltwater use: magnesium anodes are intended for freshwater only; use zinc or aluminum alternatives in brackish/saltwater
Check compatibility with your engine model and lower unit diagram before ordering to ensure correct fit.