Mercury Gearcase Anode
$30.48
Genuine Mercury gearcase anode designed to protect lower units and gearcases from galvanic corrosion and electrolysis. Provides reliable corrosion protection in saltwater, brackish water and freshwater environments.
Compatible With:
- Mercury 40HP–60HP FourStroke Outboards
- Mercury 75HP–115HP FourStroke Outboards
- Mercury Optimax Outboards
- Mercury Pro XS Outboards
- Selected Mercury SeaPro Models
- Selected Mercury Gearcase Applications
The Mercury Marine 823913Q Gearcase Anode is a genuine Mercury OEM sacrificial anode designed to protect Mercury outboard gearcases and lower units from galvanic corrosion and electrolysis. Manufactured from marine-grade aluminium alloy, this anode is engineered to corrode before critical underwater metal components, helping to preserve the integrity of the gearcase and extend the service life of the outboard.
Operating in saltwater, brackish water and freshwater environments exposes marine engines to galvanic activity that can rapidly damage unprotected metal components. The 823913Q anode provides a controlled corrosion point, absorbing this electrochemical activity and protecting expensive gearcase castings and associated underwater components.
Manufactured to Mercury Marine specifications, the anode offers precise fitment, correct alloy composition and reliable corrosion protection. Regular inspection and replacement of sacrificial anodes is an essential part of preventative maintenance and helps avoid costly repairs caused by electrolysis and corrosion.
This anode is commonly fitted to a wide range of Mercury outboards and is designed as a direct OEM replacement for selected gearcase applications.
Supersedes:
- 823913A1 → 823913Q


















