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PBzeer 05-24-2007 09:59 AM

Question on Dipstick for Clutch on Yanmar 2GM
Pulled the dipstick for the Clutch oil, but I'm not sure how to read it. There is one black ring, about a 1/2" up from the bottom, that I assume is the full level. As the clutch is obviously low (barely on the dipstick) and doesn't take much oil, I want to be sure I'm reading it correctly.


SailorMitch 05-24-2007 10:22 AM

PBZ -- Yes, you are reading it correctly. Working from memory here, but I think when putting the dipstick back in for the reading itself (after cleaning the residual oil off) you don't screw it in, just let it hit the top of the opening and take the reading from that. I'll look at my servive manual tonight, but I'm pretty sure that's the recommended way to do it.

PBzeer 05-24-2007 10:25 AM

Yes, that's the correct way to read it, just wasn't sure about the mark. On a related note, would low oil cause the clutch to slip?

jrpla 05-24-2007 11:03 AM


I have same motor on a beneteau 32.

to read the oil start the engine a few minutes, turn off, unscrew the dipstick, clean it and then put it to read it without screw in it.

Is very dificult to see the oil in the stick, use a white paper, then touch the paper with the stick to read it.

A few month ago my clutch was sliping, you need to change the oil with new HD 30 oil, it use so little, you need to fill it little by little and messure it.

Don't overflow it because it will hot the transmision.

billangiep 05-25-2007 07:56 PM

The Yanmar dealer here in St. Pete recommends non detergent straight 30wt. There is not a clutch per say but what is called a "cone" nine times out of ten if your tranny is slipping that is the problem. Have you checked your shift linkage? It is very critical that the linkage maintains pressure on the shift lever of the trans. There is a barrel type piece (can't remember what it's called) that is attached to the end of the shift cable then to the shift lever itself on the trans. This has a double acting spring to keep tension on the shift lever both in forward and reverse. Hope this all makes sense?

PBzeer 05-25-2007 09:22 PM

Adding oil, did seem to make a difference. Not a big one, but noticeable.

jrpla 05-29-2007 08:03 AM

Hi, PB

I have the same problem 1 year ago, you need to change the oil, do several changes the same day to make sure you take out all the old oil.

One you change it, the problem is fixed, if not then you need to call a mecanic to inspect your transmission.

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