Ian Malcolm wrote:

Scott wrote:

Don (and Ian),
I'm away from my boat and it's 3GM30F manual, but two things . . . .
First, I know that my 30GM30F is the fresh water version with heat
exchanger, and it has no zincs. However, I am pretty sure that the
manual describes procedures for replacing zincs in the sea water
cooled version. Yanmar has an online forum and help desk which I have
found useful, Yanmarhelp.com.

Good luck,
Scott

Yep, Yanmarhelp is a *very* good forum. I have a PDF copy of the manual
as well as the dead tree version which normally lives onboard so I was
able to check my facts. :-) Cant remember were I found the PDF or I'd
provide a link to it. :-(

Hi Ian,

I've got the "dead tree" (I like that version
of the service manual down at the boat also.
That's how I know where the zincs reside in the
engine. I'd imagine that for the FWC versions
they just plug the zinc holes with a cap.
Unfortuately my 3HM is raw water cooled.

I think that I'll do as you suggest and pull the
zincs to take a look at them. I was just trying
to get a feel from others how often they were
having to replace them.

If you find that PDF, I'd sure like a link to it


Later,

Don W.