Volvo MD11cC water in sail drive transmission

jashenderson

New member
Joined
19 Jun 2007
Messages
19
Visit site
I have discovered water in the transmission of my Volvo MD11C saildrive, 1980. What should I do to determine how it got there and how to fix it.
 

oldsaltoz

New member
Joined
4 Jul 2001
Messages
6,005
Location
Australia, East coast.
Visit site
The first thing to do is remove the contaminated oil before any real damage is done.

Pump out and flush then add new claen oil.

Is the oil just milky? or can see water when pumping out the lower section of the leg.

Then start looking for the point of entry.
 

bigwow

Well-known member
Joined
26 Feb 2006
Messages
6,516
Visit site
Might just need the oil seals, there are 2, replacing. Easy job in the housing behind the prop.
 

jashenderson

New member
Joined
19 Jun 2007
Messages
19
Visit site
Thanks for the reply. I'll pump out the old milky oil and add fresh. There is also milky oil settling around the rubber seal around the outdrive. Can that be an indication of something?

Jim
 

bigwow

Well-known member
Joined
26 Feb 2006
Messages
6,516
Visit site
Afraid so, prop has to come off, then the housing which contains the seals, which also holds in the final drive, has to be removed. Milky oil on the seal could just be a sign of sloppy work during oil changes or an engine oil leak.
 

Sans Bateau

Well-known member
Joined
19 Jan 2004
Messages
18,957
Visit site
"Don't worry about it too much, modern oils coat the metal surfaces well enough and each droplet of water will be wrapped up in an oil film." That's what I was told by an eminent forum engineer, last year when I made the same discovery. Used the boat all summer. I intended to change the oil seals during the winter. In the end it was not done until the spring of this year. There was no sign of any corrosion on the gear cluster at the foot of the sail drive.

So, if you want to save the lift, do it next winter haul out.
 
Top