Hi everybody, Iím Terry Brown and again Iím in
the Mancave, in the Wired2fish Mancave and what I am going to do today is Iím going
to show you how to change the lower unit lube.
Weíve got a 9.9 Yamaha Outboard that we are going to change the lower unit lube in.
One of the things that I want you to make of is that you check the specifications of
your motor to make sure that you get the right lubricant for your particular motor.
I happen to use 90 weight all the time and there are some 75 W, there are some 80 E weights,
a lot of times that is detergent rust inhibitors, some of those kind of things that go into
the motor.
There are things that you need to check with your manufacturer or your dealer to find out
which ones best.
I use Super Tech, I use Royal Purple, I think both of them are good.
Royal Purple, the reason I like it is itís a synthetic.
I think it is a real good lube for your lower unit.
I have never had a failure; even on a big motor or a little motor, Iíve never had any
problem with it.
The tools youíll need today would be of course the lube, youíre going to need gear lube,
youíre also going to need a good screwdriver that youíll be able to take the screws out
of the bottom of the lower unit so that you can drain it and then fill it up.
Youíre going to need a good set of gloves so you donít get it all over your hands.
The thing about gear lube is that it is sticky so when you have it come out itís real thick
and normally it is thicker than regular motor oil so when you have it come out, you can
get some on your hands so a good set of gloves plus it is good to loosen those screws that
go into the lower unit.
A good tub, which is very important and I like a bigger one, the bigger one the better.
This is one that I changed oil in for a lot of years but it is one that I can pour out
as well.
Everything I keep I recycle, so when I get it, I take it and I like the spout on it.
The thing I like about that is that I can pour that into a jug, take it to a recycle
center and they can use that again.
The other thing youíve got to have is rags, and have a lot of those around and the only
reason that you need those is to wipe off and clean up your motor after youíre done.
But when you get through doing this, youíre going to find out that it is a very easy process
and itís not hard to do.
When you start to do this, you want to make sure that you are doing this for the right
reasons.
If you just changed it last fall, you may not have to but I always like to go at the
beginning of the year knowing that this is the way to go from the stand point of, Iím
not getting water in my lower unit, Iíve got good oil in it and Iím read to go for
the entire year.
When we drain this oil, one of the things that you want to look at is you want to look
at it and see if there is any milky color to it or a mustard color and the reason for
that is, is that there could be water in the lower unit.
That can add to wear; you can also have a failure as a result to having water in your
lower unit.
You want to get that motor as quick as you can to your dealer and let them take a look
at it.
Make sure that everything is ok; you might have a seal or something that is bad.
Also, you want to make sure when you look at this, it looks like it went it the way
it comes out.
Sometimes there can be shavings and be little pieces of metal that maybe in there that youíll
see that will come out in the oil.
If that is the case, that could be un-necessary wear and you have to be very careful of that
as well.
Most generally, you just have some small filings and thatís ok because thatís just normal
wear and tear and when you change the lower unit lube, you should see better performance.
You should see that you are going to feel very comfortable as you go out and fish the
tournament year.
Ok weíre set up and what Iím going to show you is there are actually 2 screws that you
have to worry about.
Thereís one on the bottom and thereís one on the top.
And what youíre going to do is youíre going to loosen the one on the bottom first and
the reason for that is there is a vacuum created between this area here that allows that to
start to drip just a little bit.
When I loosen the top screw, the oil is going to flow freely and itís going to be able
to go right into the can that weíve got below to catch it.
So, Iím going to undo this one, sometimes they are pretty tight and you want to make
sure that you keep track of this, ok so when you do this, you donít want to lose this
screw.
This screw is very very important to what weíre doing here and youíre going to see
a little bit of it drain out.
It looks really good, the oil looks great, thatís the bottom one.
Now when I lower this you can see a little bit of it drained out, when I take this top
on off and get it off of here itís going to drain much faster.
So youíre going to see the lower unit lube come out of there at a pretty good rate and
what that means is that youíre going to get it all out of there.
A little bit of dirt in it but overall itís pretty good looking and weíre going to let
that drain.
Takes about anywhere from 10-15 minutes for this to drain and you want it all drained
out of there and the other thing you might want to do is once you get this started to
go, is to lower your motor just a little bit.
So Iím going to do that.
Iíve got trim on this boat so I am able to do that and we are going to let it all run
out of there.
You want to keep track of these screws, they can be different sizes.
Most motors anymore arenít so it works out pretty good that way.
To fill this, when you get ready to fill this, there is also a very unique way to do it and
I will show you when we get ready to do it.
As this oil leaks out, thereís not that much oil in the lower unit.
Surprisingly enough, itís about, oh I canít even tell ya, maybe about 10-12 ounces, maybeÖÖmaybe
not even that much.
But when it all drains out and it comes out of the motor, you can look down in that and
there is a little bit of dirt in it but overall it looks pretty good.
There is not any metal shavings, there arenít any chunks of metal in there so that means
the lower unit is still in great shape.
The vacuum is created when you get ready to fill it and I will show you that in a second.
When we put the oil and it starts to come out, the way you can tell itís at the right
level is it will start to come out the top because you fill from the bottom.
So when you fill from the bottom, youíll squeeze the bottle, it will start to come
out of the top and that way you will know it is at the right level and you can use a
wire, you can actually stick that wire in there and if it has oil on there when it comes
out or tie wrap or whatever you may have, that will be able to do that.
We have got most of it drained out, thereís still a little bit dripping but because this
was put in last fall it shouldnít be too bad, it looks good, everything looks good.
What we are going to do now is fill this.
To fill this, you fill it from the bottom and Iím going to show you what you will do
is you will put oil in it, you will fill it from the bottom and then we will raise the
motor up to put the bottom screw in so we can see it better.
But what you will do is that you will stick that tube in there, some of these have pumps
and stuff but I like using the bottle so that way I can see it.
So, Iím going to fill it, until it comes out of that top hole, ok there it is coming
out of that top hole, Iím going to take the top screw and Iím going to keep that in there
so this is a little bit tenuous at times because you have got to get that top screw in there
without taking this bottle out because it will drain right back out if you donít.
So you put that top screw back inÖ..I just about had itÖ..clean your fingers off just
a little bit, tighten it up, we will go back and tighten it up with a dry screwdriver when
we are done here.
Keeping the bottle in here now, the bottle is still in here.
Now what I am going to do is I am going to pull the bottle.
It will drip a little bit, thereís a gasket as you can tell thatís on this, you want
to make sure itís still on there good, youíre going to pull this off of here, youíll see
just a small amount of dripping, not bad at all, youíre going to put that screw in, just
like that and itís threaded in, use my fingernail to get it going, than I will use a screwdriver
and tighten it up, using a rag to get my hands good and clean.
Again, itís one of those things where now, once this is put it, you want to get the bottom
one first, get that put in, good and tight,itís tight.
Then go back up to the top, tighten it up, I like using a rag on this because this oil
is very slick and you will find out that it will tighten just bout a half a turn and tighten
this one.
And the last job which is the dirtiest job is that you take that same rag, you wipe everything
off so your motor is good and pristine and that is how you change the lower unit lube.
An easy job, not one that is very hard to do, a little bit messy Iíll tell ya that
but overall an easy job to do.
You can do that on a small motor, you can do it on a big motor, exactly the same way.