On Sat, 06 Mar 2004 14:33:28 GMT, "Frank Gerry"
wrote:

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

Par 4.3.4 from the maintenance book
Inspection and replace anti-corrosive zinc
1 Close the kingston cock
2 drain the cooling seawater
3 remove the plug labeled ZINC
4 check the plug on the inside of the plug to determinate the
amount
of wear top the anti-corrosive zinc.
( replace the anti-corrosive zinc when it has been reduced to
less than 1/2 of its original size)
( if there is only a little bit of wear, clean the surface by
sanding off only corroded areas
5 replace plug
6 open the kingston cock and check water leakage.
Inspection ** every 500 hours

On
I don't know at what point of the motor the zinc plug is located but a
phone call to a dealer will help.
Good luck,
Ben