Merc Lower Unit - Grease Nipple?

[gman1001]

Hi there - my manual doesn't show this grease zirc fitting. Anyone ever seen a grease fitting before in this location?

I'd think the gearcase is lubricated with the standard lower unit oil/lube.

If you can confirm this is where its supposed to be, can you tell me what grease to use?

Many tx!

 

[huntin dawg]

Re: Merc Lower Unit - Grease Nipple?

Looks like an add-on to me. Never seen a grease zerk on a LU before. If it's full of grease I wouldn't run it. Maybe somebody thought grease would be better than gear oil? Maybe it has a bad seal and leaks oil so they filled it with grease?
I'll be interested to see what comes of this one.

HD

 

[BaileysBoat]

Re: Merc Lower Unit - Grease Nipple?

What year and model?

I have seen Yamaha engines with a grease fitting.

The gear case itself should be full of gear oil

 

[Droll]

Re: Merc Lower Unit - Grease Nipple?

Hi there - my manual doesn't show this grease zirc fitting. Anyone ever seen a grease fitting before in this location?

I'd think the gearcase is lubricated with the standard lower unit oil/lube.

If you can confirm this is where its supposed to be, can you tell me what grease to use?

Are two grease nipples, are one further in too..

From Mercury service bulletin 82-11

• BEARING CARRIER LUBRICATION FITTINGS - NEW 80/90/115 HP MODELS
• New 80/90/115 HP models have two lubrication fittings in the gear housing bearing carrier
• (Figure 1). To prevent bearing carrier seizure, lubrication with Quicksilver Multipurpose or
• 2-4-C Lubricant at least once a season, is recommended (two to four pumps of lubricant in each
• fitting is sufficient).

The lower unit itself uses normal gear oil and should be checked/changed as on any other lower unit.


Arne Kjetil

 

[gman1001]

Re: Merc Lower Unit - Grease Nipple?

sorry about that.. the motor is a 1988 115 straight 6.

I can't see if their is another zirc further in.

Thank you so much for posting that service bulletin!

 

[Wildfury]

Re: Merc Lower Unit - Grease Nipple?

I have the same thing --- plus another I can see way back inside with the prop off --- as a rookie - I attempted to fill them assuming that the belonged there. I could not reach the deep one, only the one near the prop --- -- adjusted the idle mix and took it on the water and noticed a squeal, intermittent below the engine noise. I had not had the boat in the water since '08 and was not sure if perhaps the idle mix was too lean. My boy could not hear it. After perusing the site (newbie here) I drained the lower unit oil. Looks like grease is mixed in. -- Can a rookie reseal a lower unit if seals are broke? I am concerned I own a money pit. I actually like the boat - It really moves.

I don't work on cars or boats. I can do simple stuff. I initially started poking around the site to see how hard a carb rebuild would be.

I know this is an old thread. I am just hoping someone sees it.

1979 Merc 115 straight six.

Why would someone put grease nipples on a lower unit to fix seals (if that's the cast) then pawn it off on someone else. Geez.............

I am thinking I may have to sell it. However, I don't want to pawn an issue off to someone else without either fixing it or telling them what's wrong with it. I will also have to check how much oil should be in there and compare to how much I was able to drain.

 

[Wildfury]

Re: Merc Lower Unit - Grease Nipple?

As additional information, when I did grease the one fitting, grease came out - looked like it was full to me ---- I didn't think twice about it at the time. How stupid

 

[Wildfury]

Re: Merc Lower Unit - Grease Nipple?

Here is a link with similar issue - it is iboat forum --- this guy also has two grease fittings.

http://forums.iboats.com/showthread.php?t=383430

I may need to take it into the shop this weekend and ask.
I need to be sure at this point.

If anyone sees this and knows about this fittings - I would appreciate it.

Copied this from the other thread. The other thread is stating to lube them once per year. And - I do not believe I have water in my oil, but I am not positive.


Quote:
BEARING CARRIER LUBRICATION FITTINGS - NEW 80/90/115 HP MODELS
New 80/90/115 HP models have two lubrication fittings in the gear housing bearing carrier
(Figure 1). To prevent bearing carrier seizure, lubrication with Quicksilver Multipurpose or
2-4-C Lubricant at least once a season, is recommended (two to four pumps of lubricant in each fitting is sufficient).


Quote:
If I am suppose to grease these fittings
Once a year...

 

[Wildfury]

Re: Merc Lower Unit - Grease Nipple?

At this point I am unsure if they belong there or not. My books say nothing about them and getting mixed messages on the boards.

 

[daveswaves]

Re: Merc Lower Unit - Grease Nipple?

At this point I am unsure if they belong there or not. My books say nothing about them and getting mixed messages on the boards.

Refer to arne,s thread from april, the fittings are factory. The service bulletin says it all.

 

[Wildfury]

Re: Merc Lower Unit - Grease Nipple?

My 1st day here. How do I find the thread?

And thanks by the way.

 

[Wildfury]

Re: Merc Lower Unit - Grease Nipple?

Nevermind - I found it --- thanks much ---
Gotta find that lubricant now.