What is the purpose of draining the monitor before the lower unit? The
other night I changed by lower unit oil. I just opened the screw at
the bottom, opened the monitor cap and left the loweer unit (in the
down position) drain into my pan over night. The next AM the monitor
was empty and even after opening the top plug all the lube was out.
So is draining the monitor just to make things go faster?

-Robert

On Sep 28, 4:25*pm, wrote:

BT be sure you pull both plugs on top whine filling or you won't get a
full load.

My manual only references one top plug. Step #6 of "filling Drive Unit
Oil" says "Remove *the* oil vent screw and sealing washing"(emphasis
added). In the picture they only show the one. Hopefully there is only
one.

-Robert

He's working on a mercruiser. One plug on the top, one plug on the bottom.

Make sure you fill from the bottom.

wrote in message
...
On Sun, 28 Sep 2008 18:52:44 -0700 (PDT), "Robert M. Gary"
wrote:

On Sep 28, 4:25 pm, wrote:

BT be sure you pull both plugs on top whine filling or you won't get a
full load.

My manual only references one top plug. Step #6 of "filling Drive Unit
Oil" says "Remove *the* oil vent screw and sealing washing"(emphasis
added). In the picture they only show the one. Hopefully there is only
one.

-Robert

It all depends on the design. I have seen them both ways. It is the
midrange and "Big Foot" Mercs that I have seen with 2 plugs on top.