IT MUST BE HERE SOMEWHERE!!

[DENNIS CHERONE]

THE MANUAL FOR THE YANMAR IS VAGUE AS TO WHERE THE ZINC IS. I'VE LOOKED ALL OVER. CAN'T FIND IT. ASKED THE DEALER. ALL I GOT WAS MUMBLES ABOUT "IT'S GOT TO BE THERE SOMEWHERE" ANY HELP WOULD BE APPRECIATED.

 

[Mike Kinney]

There is no zinc.

My understanding is that there are no zincs on the yanmar engine in the 340.

 

[Bryan C.]

Correct. No zincs on water cooled Yannies.*

nm

 

[Paul Akers]

Check your model number

If the last character of the model number is an "F", then this indicates a Fresh water cooled engine. e.g. 3HM35F

 

[DENNIS CHERONE]

TO ZINC OR NOT TO ZINC

TWO RESPONDENTS STATED THAT FRESH WATER COOLED YANMARS DIDN'T HAVE ZINCS. I HAD TWO UNIVERSALS AND A PAIR OF MERCRUISERS THAT WERE FWC AND THERE WERE ZINCS IN THE HEAT EXCHANGERS.WHAT GIVES?

 

[John Van Wagoner]

Yep, no zincs

I have owned 4 Yanmar engines, 1Gm, and the two cylinder, 3 cylinder, and now the 4 cylinder engines. The 1 GM was raw water cooled and had a zinc. The other three engines were/are fresh water cooled and do not have engine zincs. No kidding.

 

[Doug]

Zincs Required If Dissimilar Metals

My understanding from a Yanmar seminar is the engine does not use dissimilar metals where cooling water passes through and therefore no zincs are required.

 

[Alex]

What about heat exchanger..?

..since even on fresh water cooled engine , the heat exchange unit located on the engine (in my Yanmar 2GM20F)has most probably dessimilar metals , along with both fresh and salt water .Frankly , I am worried , and the standart explanation why on fresh water cooled engine no zincs needed , doesn't apply to this issue.I woulk like some answer on that ..

 

[John McGrath]

plating?

Seems to me I heard the inside of the heat exchangers are plated with something that precludes the need for a zinc. Don't know what that something is though...