YANMAR ENGINE ANODE 27210-200370

Function and technical context

The sacrificial anode 27210-200370 works within the salt water cooling system of the Yanmar engine, protecting it through cathodic protection: being a metal with a higher negative electrochemical potential, it oxidizes in a controlled manner before the noble metal surfaces of the engine do so, such as cylinder liners, cylinder heads, heat exchangers and internal cooling ducts. Without this active barrier, galvanic corrosion progressively attacks the engine block and water circuits, causing internal leaks, overheating and structural damage that is difficult to reverse. Its correct installation is especially critical on vessels that operate in salty or brackish waters, where the conductivity of the water accelerates destructive electrochemical processes. The reference TEN01316 corresponds to the Yanmar part number 27210-200370, guaranteeing adequate dimensional and chemical compatibility for engines of this brand.

When to replace this part?

Sacrificial anodes must be inspected at the beginning and end of each sailing season, and replaced when they have lost approximately 50% of their mass, present a completely irregular surface or traces of reddish or whitish corrosion appear on the adjacent metal areas of the engine, an unequivocal sign that the anode no longer offers sufficient protection. In vessels that frequently sail in areas of high salinity or with parasitic electrical currents in the port, wear can be significantly faster, so it is recommended to check the condition of the anode at each docking or seasonal maintenance. Replacing the anode preventively before it is completely depleted is the most economical measure to avoid major repairs to the engine block or cooling system.

Compatible Yanmar Engines

Equivalent manufacturer part numbers