Chocolate milk grease in cv joint bellows

[Atlas83]

Just pulled the drive unit and there's a chocolate milk looking grease coming from it It stops at the bellow there was none on the splines.
I'm trying to upload the pics. From my phone. My best guess the boat mechanic that rebuild it the drive unit out the grease in here. The cv is grease able so........

Pics to come
It's a
Merc 120

 

[Don S]

Re: Chocolate milk grease in cv joint bellows

It's from a hole in the ujoint bellows. It then allows water in the drive as it cools, then when it gets hot again it pushes the milky oil out into the bellows.
You need a new bellows, gimbal bearing, ujoints, and new front seal and possible the yoke at minimum.

Does your Merc 120 have a year?

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

It's a 65'
So
Basiclly everything needs to be replaced. From the transom back correct.

Where does the oil come from and where does it go normally

Sorry kinda confused

It hasn't run for a yr except for last Monday.

It's a 65

 

[Bondo]

Re: Chocolate milk grease in cv joint bellows

It's a 65'
So
Basiclly everything needs to be replaced. From the transom back correct.

Where does the oil come from and where does it go normally

Sorry kinda confused

It hasn't run for a yr except for last Monday.

It's a 65

Ayuh,... Welcome Aboard,... The bellows should be Dry, save abit of purged grease from the gimbel bearing...

The oil ya see came from the outdrive,...
If the seals weren't leakin', it'd be stayin' in the outdrive...

 

[Don S]

Re: Chocolate milk grease in cv joint bellows

It's a 65'
So
Basiclly everything needs to be replaced. From the transom back correct.

Where does the oil come from and where does it go normally

It normally stays dry inside the bellows, at least it's supposed to, and the oil is supposed to stay inside the drive.

And no, you don't need everything from the transom back. The transom is the wood and fiberglass back of the boat.
http://forums.iboats.com/mercruiser...ts-only-no-exceptions-288430.html#post2437200

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

It normally stays dry inside the bellows, at least it's supposed to, and the oil is supposed to stay inside the drive.

And no, you don't need everything from the transom back. The transom is the wood and fiberglass back of the boat.
http://forums.iboats.com/mercruiser...ts-only-no-exceptions-288430.html#post2437200

I was meaning the gimbal bearing to the drive unit seal (Doesn't the bearing basically sit in the transom

Ok now I know where the culprit seal is

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

Ayuh,... Welcome Aboard,... The bellows should be Dry, save abit of purged grease from the gimbel bearing...

The oil ya see came from the outdrive,...
If the seals weren't leakin', it'd be stayin' in the outdrive...

Thanks for the welcome.

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

Thank you all in my last thread for telling me pull the drive and to look at the drive bellows. I almost didn't

Now which seal do I replace
??front seal ??
Find it where on this site?

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

Sorry for the bad pic but
Number 37is "oil seal" it's the only one I see on this picture
Is this the correct one ??

 

[Don S]

Re: Chocolate milk grease in cv joint bellows

Since you have a 65 boat, and depending on the year of the drive, you have either a 1A or a 1A-EZ drive (Serial number may help if there is one). Not sure where you got the parts break down, but be careful, it may not be the right one for your drive.
Item 39 in your picture is the oil seal that would be the problem. Plus the yoke it seals on if it's rusted or grooved.

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

The part breakdown is from the book for merccruiser
I can't find a serial #anywhere on the drive.

And I ment 39 sorry
Now on the Iboats part page it shows roughly the same picture but there's two
Ones a carrier assembly seal and an oil seal ?

 

[Don S]

Re: Chocolate milk grease in cv joint bellows

Before you do anything, you need to first determine which drive you have. Trust me, there is no such thing as a pre-Alpha.
Now, you have either a 1A, a 1A-EZ, or a MC-1 drive. All have a different front seal (#39 in your picture).
I would suggest you go to this page http://forums.iboats.com/mercruiser...cellaneous-mercruiser-information-329915.html under the very first topic, download the Merc ID and History and do some measuring and looking and determine exactly which type drive you have or you are going to find yourself in with a lot of wrong parts.

Post a link to the page you are looking at here at iboats. We have no clue what you are looking at.

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

Before you do anything, you need to first determine which drive you have. Trust me, there is no such thing as a pre-Alpha.
Now, you have either a 1A, a 1A-EZ, or a MC-1 drive. All have a different front seal (#39 in your picture).
I would suggest you go to this page http://forums.iboats.com/mercruiser...cellaneous-mercruiser-information-329915.html under the very first topic, download the Merc ID and History and do some measuring and looking and determine exactly which type drive you have or you are going to find yourself in with a lot of wrong parts.

Post a link to the page you are looking at here at iboats. We have no clue what you are looking at.

Ok I have none of those its either a 1a 1b 1c cause its a 64'
And the serial is 1724714
So I do I determine which it is

 

[Don S]

Re: Chocolate milk grease in cv joint bellows

The A,B,and C indicates the gear ratio. I was wrong about it being an A, you should have a 1B with the 120.
Page 5 of the ID and History gives the different ratios, while page 2 shows the drive model.

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

No I was wrong with the 65
sweet
More info to write down

Now time to order or .....

I wanna do this right the first time not half *** and have to do it over

Thanks for the Patience

 

[Don S]

Re: Chocolate milk grease in cv joint bellows

Take it apart, find out what you need, THEN order parts. What about all the gaskets and orings you take apart to replace that seal? They have to be replaced too. What else has been damaged along the way.

Time for some serious disassembly and inspection before you order anything.

You also need the manual and some special tools. Better do some reading here #01 Eng & Drives 63-73 - Download - 4shared - Don S before doing anything else.

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

So I need to take apart the entire upper part and inspect everything correct. Cause with no oil there might be more wrong right.


I did drain the lower before removing it and there was oil to drain the impeller was good looked brand new.
should i do the same with the lower I dont see a reason to do the same to the lower cause theres nothing yet to indicate the need (as of yet)

 

[Atlas83]

Re: Chocolate milk grease in cv joint bellows

Before you do anything, you need to first determine which drive you have. Trust me, there is no such thing as a pre-Alpha.
Now, you have either a 1A, a 1A-EZ, or a MC-1 drive. All have a different front seal (#39 in your picture).
I would suggest you go to this page http://forums.iboats.com/mercruiser...cellaneous-mercruiser-information-329915.html under the very first topic, download the Merc ID and History and do some measuring and looking and determine exactly which type drive you have or you are going to find yourself in with a lot of wrong parts.

Post a link to the page you are looking at here at iboats. We have no clue what you are looking at.

Mercruiser Sterndrive Drive Parts - iboats

Could you tell me where to look on this page.

I would like to price out items

 

[Don S]

Re: Chocolate milk grease in cv joint bellows

You need to find an OEM parts lookup. The iboats link only goes back as far as the MC-1 drive with aftermarket lookup.
Basically you have an antique in the outdrive world, and parts are few and far between.
Once you find the OEM part numbers you can see if they convert to aftermarket parts.

 

[elkhunter338]

Re: Chocolate milk grease in cv joint bellows

Could he just replace the upper unit with a SEI 106 upper (list 1973 - 1990).