Engine and Gear Box Oil Specifications for 2007 Yanmar 3YM30

Caspurr

Caspurr

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Oct 5, 2015
80
Hunter 33 33 Halifax
I am looking for the Specs for the oil I use in my 2007 Yanmar 3YM30 engine.
In preparation for winter storage I am doing an oil change on my engine and want to change the oil in the Gear Box as well. The specs on this oil seem somewhat confusing.

I used a 15W-40 Heavy Duty Diesel Oil in my engine but can’t find the specs on the transmission oil I need to do a change.

I picked up some Diesel Fuel at Petro Can and they had a DURON E SAE 15W-40 (Premium Heavy Duty Diesel Engine Oil). I purchased a couple of these for the oil change but could not find the one specked in the manual for the transmission.


Some sites say to use the same oil in the transmission. Is there a specific oil I should use in my Transmission?
 
BigEasy

BigEasy

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Jun 21, 2004
2,533
Beneteau 343 Slidell, LA
I use 30 wt oil in my 3YM30 gear box. In addition to the owner's manual, look at the identification plate, on top of the gear box. I believe there is \ information at that location for the oil specification.
 
dziedzicmj

dziedzicmj

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Aug 13, 2012
533
Catalina 270 Ottawa
Shell Rotella is widely used. Canadian Tire has a sale, regularly, on the 5 l container. I am afraid that you just missed it for this fall. I use 15W40. It does not get as hot in Halifax as here, so you can go 10W30.
 
Caspurr

Caspurr

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Oct 5, 2015
80
Hunter 33 33 Halifax
So you would use the same oil in the gear box. Diesel engine oil at the spec weight identified on the tag on the transmission.
 
Scott B

Scott B

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Sep 20, 2006
2,912
Hunter 33 Georgian Bay, Ontario, Canada
Caspurr said:
So you would use the same oil in the gear box. Diesel engine oil at the spec weight identified on the tag on the transmission.
Click to expand
Deisel 30 wt only for the gear box. Rotella T 15W-40 for the engine.
 
Ron20324

Ron20324

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Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
Caspurr said:
So you would use the same oil in the gear box. Diesel engine oil at the spec weight identified on the tag on the transmission.
Click to expand
It's not the same weight oil, it is the same TYPE of oil. SO, yes, the label on the tranny spec. I, though, do not use the diesel-type oil, as this is non-combustion situation..
 
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Caspurr

Caspurr

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Oct 5, 2015
80
Hunter 33 33 Halifax
So just use regular engine oil ie 10W-30 vs the Diesel Oil (15W-40) I use in the engine?
 
Terry Cox

Terry Cox

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Dec 25, 2000
5,733
Hunter Passage 42 Shelter Bay, WA
Caspurr said:
So just use regular engine oil ie 10W-30 vs the Diesel Oil (15W-40) I use in the engine?
Click to expand
What does the plate on your bell housing state? Use whatever it states in your transmission. Our 4JH2-TE states ATF.
 
Caspurr

Caspurr

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Oct 5, 2015
80
Hunter 33 33 Halifax
I will check the Tag on the transmission tonight. From the Yanmar Manual:
upload_2017-10-18_14-54-30.png

Not being a mechanic I am somewhat confused wrt which oil I can use.
 
Jake N Eggs

Jake N Eggs

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Jun 2, 2011
347
Hunter H33 Port Credit Harbour, ON.
Caspurr said:
I will check the Tag on the transmission tonight. From the Yanmar Manual:
View attachment 142010
Not being a mechanic I am somewhat confused wrt which oil I can use.
Click to expand
Here is what I sent to my buddy when he asked pretty much the same question. I have the 3 YM 30 engine.

15W40 is a higher viscosity multigrade oil. If you were in the south where it is hotter it would make sense. We used 10W30 in all of our equipment and that is what I use in my boat engine. I also used the 10W30 in the transmission.

The CD classification is for diesel engine oil but it has been updated. The latest classification is CJ. Don’t get an S classification oil as this is for gasoline engines.

I would suggest that you stick with SAE 30W CJ-4. If I had to go and buy the oil that is what I would get.

Here is a link to some data. http://www.apicj-4.org/2009_engine_oil_guide.pdf
 
Caspurr

Caspurr

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Oct 5, 2015
80
Hunter 33 33 Halifax
Thanks for the information guys. The 15W-40 I used has a CJ-4 Rating. I will pick up a 10W-30 for the transmission tomorrow as the stamp had 20/30 same as manual.
 
Tally Ho

Tally Ho

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Jan 7, 2011
4,778
Oday 322 East Chicago, IN
This is the ID tag from the tranny on my Yanmar 2GM20.
Hard to read, but it says "SAE 20/30 HD".


Oday 322 Tranny badge plate.JPG
 
Ron20324

Ron20324

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Jan 22, 2008
8,050
Beneteau 323 Annapolis MD
Caspurr said:
...The 15W-40 I used has a CJ-4 Rating. I will pick up a 10W-30 for the transmission tomorrow as the stamp had 20/30 same as manual.
Click to expand
I believe that means an EITHER 20 OR 30, not a multi-grade . go with the manual in post 11. LUBE OIL needs to be decided by the transmission, not by the engine.
 
Terry Cox

Terry Cox

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Dec 25, 2000
5,733
Hunter Passage 42 Shelter Bay, WA
Caspurr said:
I will check the Tag on the transmission tonight.
Click to expand
Trust what the transmission plate states. Our Yanmar owner's manual differs with what the Yanmar Service Manual states. One says engine oil and the other states ATF.
 
BigEasy

BigEasy

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Jun 21, 2004
2,533
Beneteau 343 Slidell, LA
Caspurr said:
Thanks for the information guys. The 15W-40 I used has a CJ-4 Rating. I will pick up a 10W-30 for the transmission tomorrow as the stamp had 20/30 same as manual.
Click to expand
The engine manual and the specification plate on the transmission specifically states that 20# or 30# HD gear oil should be used in the transmission. This is not the same oil as 15W-40 or 10W-30 multi viscosity motor oil. Why on Earth would you want to use 10W-30 motor oil in your transmission, when the transmission manufacturer specifically states what you should use??? I use 30# HD gear oil in my 3YM30 gear box as specified by Kanzaki.
 
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