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


Thread: Yanmar transmission dipstick question Reply to Thread
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Topic Review (Newest First)
08-21-2014 07:46 AM
smurphny
Re: Yanmar transmission dipstick question

Quote:
Originally Posted by aa3jy View Post
I unscrew the dip stick, wipe off, place the dip stick in without screwing down, pull out dip stick and just touch the bottom of the dip stick to a clean white/light colored paper towel. If I see oil on the paper towel then it is at the correct level.
I started using a 1/4" wooden dowel. It's marked at the same length as the dipstick and I can actually see the wet oil line on it.
08-20-2014 08:32 PM
aa3jy
Re: Yanmar transmission dipstick question

I unscrew the dip stick, wipe off, place the dip stick in without screwing down, pull out dip stick and just touch the bottom of the dip stick to a clean white/light colored paper towel. If I see oil on the paper towel then it is at the correct level.
08-20-2014 07:30 PM
smurphny
Re: Yanmar transmission dipstick question

The cap should not be screwed down and the oil should be AT the 1/4" mark, not above. The manual specifically notes to not overfill the tranny which is easy to do. My pet peeve is that it is next to impossible to see the darned oil on the stubby little dipstick. If you put some magic marker or something on it, it makes it a little easier.
08-19-2014 02:29 PM
TropicCat
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
08-19-2014 11:06 AM
aa3jy
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
Concur..
08-19-2014 10:44 AM
wrapper
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
05-01-2011 08:04 PM
arf145 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.
05-01-2011 03:38 PM
CaptainForce
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
05-01-2011 01:27 PM
arf145
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".
04-30-2011 07:28 PM
Omatako 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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