Another Yanmar question

[rpmerrill]

As I continue my Yanmar "get to know you" sessions, I have endeavored to take a look at my engine zincs. I tried my various wrenches and none were big enough for the job. I had a bigger socket at home and decided to take a chance that it was the right size. This morning I returned to the engine room with my 22mm and it almost fit. I also had a 7/8 open end wrench that was really close but still too small. I did the math and came up with 7/8" = 22.23mm. OK, looks like we're looking for a 23mm socket?

But wait a minute. The socket idea has another problem. There is so much "junk" (turbo) blocking the way the socket and a ratchet are not going to get in there. So I just came home with a nice new box end wrench. It is pretty big and I'm afraid the handle is going to be too long.

I'll know the answer shortly. In the meantime, I'm open to suggestions.
How do you do it?
Is 23mm correct?

 

[Rockyman]

How do you do it?
Is 23mm correct?

On my Yammar 4BY2-180 the original zincs (never replaced by the previous owner) were 23mm but the replacements I bought from J-Way enterprises (my main source for Yanmar parts) were 22 mm. I found a 3/8" drive socket with ratchet handle could be used, with some difficulty getting around the other fittings. Removing the old (completely destroyed) zincs was a lot harder than tightening the replacement zincs. The top one is much easier to get at than the bottom one.

Here is the link to J-Way enterprises: http://www.mcssl.com/store/j-wayenterpr ... 0650-18490

 

[trailertrawlerkismet]

I've found that long handled channel lock pliers can do the job on the lower zinc. Not ideal but they will get the nut loose. Also a socket driver with a pivot head has come in handy for this and many other tight and hard to get to places in and around the engine.

Jim

 

[rpmerrill]

I guess channel locks or even vise grips would be good in a pinch. I hate to bugger up those soft hex heads, but I'll keep that in mind.

 

[Osprey]

Rockyman is correct as to the 23 mm wrench size to fit the Zn for Yanmar 4By & 6BY engines. I have no experience with J-Way but I have found that www.boatzincs.com is an excellent source of anodes. Their product 120650-13420 is good for the 4BY & 6BY engines. Their web page suggests that a 22 mm wrench fits. I have found that I can force a 22 mm, 6 point, box end wrench on, but not a 22mm open end wrench on. A 23mm open end does the job. This could simple be a character of the particular wrench I have. BoatZincs claims a 22 mm wrench fits.
A standard length wrench is too long to use in this application. What I did was to cut a 23mm box end/open end wrench in half to yield two short handles wrenches, one box and the other open. Now that left each "new" wrench with only about 4 inches of handle. Next I cut about a 7 inch length of 7/8 inch diameter SS rail tubing. This tubing, when slipped over the handle of one of the "new" wrench handles, yields a wrench with a telescopic handle. I can use the tube on either "new" wrench as required. I also have on hand a longer length of tube for other applications which have more room to work.