I have a Yanmar 18 HP 2GM20F diesel in my sailboat and was hoping for
someone with that engine or similar could answer my question about the zinc
anode. I was wondering if this engine has one and where is it located.
The manual states indirectly that there is one( i.e. it states the zinc
anode should be replaced periodically). But the manual does not identify a
location or a part number. Nor can I find it anywhere on the engine unless
it's hidden under some piece. Has anyone else had this problem?

Frank