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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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Old 04-30-2011
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Yanmar transmission dipstick question

My 2gm20f has the Kanzaki trans. The little dipstick has one mark on it about a quarter inch up from the bottom and a hole up near the top. Is the oil level supposed to be between the bottom and the mark, or between the mark and the upper hole?
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Old 04-30-2011
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Not sure of the make of my Yanmar gearbox but the oil level is no higher that the first mark with the cap screwed down.
Safe sailing
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And be careful with that cap screwdown. I've managed to strip my threads right off and rip off the thumbscrew.

How to get it out, I have no idea right now
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Yep, anywhere between the marks is good. The marks are indicating no-go areas, no lower than the bottom and no fuller than the top. The level will in any case change with the temperature of the gearbox, fuller when hot obviously.
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Quote:
Originally Posted by Omatako View Post
Yep, anywhere between the marks is good
Thanks for the replies, all. My situation was I got to my boat and found that the mechanic that was working on the shaft had noticed the trans oil was low and had added to the point that the level was midway between the one mark 1/4" from the bottom of the stick and the hole a few inches away near the top. I thought that was too much.

So, between the "marks" was the problem--which marks? There is such a small space between the bottom and the one mark, but it is what I had always taken to be the small target area. Essentially you're checking for the oil to barely be on the stick. My manual says to check with the cap unscrewed, but is hazy on the marks. The trans only takes between .25 and .3 liters of oil, a little over a cup.

I removed about 4 ounces to bring it down to the mark at the bottom of the stick, which I take to be the "top".
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Quote:
Originally Posted by night0wl View Post
And be careful with that cap screwdown. I've managed to strip my threads right off and rip off the thumbscrew.

How to get it out, I have no idea right now
I've done this same thing! There's no need to tighten it more than with light fingers.

I have been advised to keep my 30wt oil level for my Kanzaki transmission at the mark that appears bout 1/4" from the bottom of the probe and to check this level without the dip stick screwed in, but just seated against the opening. ......5,170hrs on my 4JH3E and treating me very well! Take care and joy, Aythya crew
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Well there you go, another for on the mark. Makes me nervous when mechanics don't know this stuff. And thanks both of you for the warning on overtightening. Noted.
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Re: Yanmar transmission dipstick question

Quote:
Originally Posted by centaursailor View Post
Not sure of the make of my Yanmar gearbox but the oil level is no higher that the first mark with the cap screwed down.
Safe sailing
I beg to differ. The cap should not be screwed down.

See the caution at:

TRANSMISSION TYPES
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Re: Yanmar transmission dipstick question

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Originally Posted by wrapper View Post
I beg to differ. The cap should not be screwed down.

See the caution at:

TRANSMISSION TYPES
Concur..
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Re: Yanmar transmission dipstick question

Quote:
Originally Posted by wrapper View Post
I beg to differ. The cap should not be screwed down.

See the caution at:

TRANSMISSION TYPES
I seem to recall this is true
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