Outdrive lube resevoir has white layer in the bottle?

Grand Larsony

Petty Officer 1st Class
Joined
Aug 13, 2008
Messages
221
(post edited for clarity)

1989 Sea Ray Sundancer with twin 5.7 Merc 260 I\O drives.

Each outdrive has an aftermarket "lower unit lube bottle" installed inside the transom with a hose to the top of the outdrive leg (to allow for greater lower end lube capacity). They're like the units that come standard wth the newer outdrives, but mine are retrofitted to my older Alpha1 legs. Bottles are clear, so I can see that the oil levels are not decreasing (e.g. were not during last year). They do not have level alarms on them as some do.

After storage, one of the bottles has a half-inch layer of white stuff on the top surface of the oil. It wasn't very mixed in, and I don't think the oil in the bottle ever recirculates into the drive units unless there is a failure. I didn't look at the other bottle, nor have I checked after a few short runs (believe it or not, this concern came to me in my sleep when I subconsciously remembered seeing it -- sort of strange I know).

Any worries here? I'm thinking it's condensation from storage, but I will check more thoroughly later today if I can.

The drives were fully serviced in July last year (bellows, impellers & housings, seal kits, new lube, etc.). We checked the lube using the lower drain screw in the fall -- it was fine -- so we skipped the service this year. I only put about 30 hours on the boat each season (bought boat in August last year, so I don't have service history beyond that time).
 

bobhol

Petty Officer 2nd Class
Joined
Oct 5, 2009
Messages
146
Re: Outdrive lube resevoir has white layer in the bottle?

I changed my lower unit lube reservoir to one with the alarm leads last week. I was shocked to see a thick residue the consistency of jello in the bottom half of the reservoir. From the outside it looked completely normal . I had to scrape it out and I am sure it was not able to go down the hose to the outdrive if need be. I would absolutely remove the reservoir and drain it and refill just to be sure...regards,Bob
 

John_S

Rear Admiral
Joined
Jun 21, 2004
Messages
4,269
Re: Outdrive lube resevoir has white layer in the bottle?

It is common to get the build-up on the bottom. Not sure about a "white" layer, though. Water? I believe the res bottle cleaning is part of the annual maintenance recommended by Merc.
 

bobhol

Petty Officer 2nd Class
Joined
Oct 5, 2009
Messages
146
Re: Outdrive lube resevoir has white layer in the bottle?

After seeing the gunk in there it is sure on my annual list!!!
 

Grand Larsony

Petty Officer 1st Class
Joined
Aug 13, 2008
Messages
221
Re: Outdrive lube resevoir has white layer in the bottle?

My mechanic said yeah, this is a constant problem with lube resevoirs. He always drains the drive, then disconnects the hose and sucks it dry. Then flushes with some sort of solvent, then reconnects and refills.

He definitly said that lots of outdrives get ruined when the bottle or hose gets plugged. Totally defeats the purpose of having the bottle.
 
Top