I cannot figure out how to put the lower unit back to the motor after I
have removed the lower-unit to check the impeller. I inserted the
drive-shaft back to the hole and lined up the bolt; but I could not put
the lower unit all the way; something got stuck, and I ended up getting
a 1" gap that I could not close. I kept rotating the drive shaft
hoping that this might help the driveshaft to get on gear; but that
didn't help. At one point, I managed to get the gap to close to 1/2"
after spinning the driveshaft; but subsequent attempts of spinning the
driveshaft didn't help. By the way, the gear was at neutral if this
matters.

Am I missing something?

Thanks in advance for any help.

Jay Chan

Shift shaft and water-pipe need to all line up too.

-W

wrote in message
oups.com...
I cannot figure out how to put the lower unit back to the motor after I
have removed the lower-unit to check the impeller. I inserted the
drive-shaft back to the hole and lined up the bolt; but I could not put
the lower unit all the way; something got stuck, and I ended up getting
a 1" gap that I could not close. I kept rotating the drive shaft
hoping that this might help the driveshaft to get on gear; but that
didn't help. At one point, I managed to get the gap to close to 1/2"
after spinning the driveshaft; but subsequent attempts of spinning the
driveshaft didn't help. By the way, the gear was at neutral if this
matters.

Am I missing something?

Thanks in advance for any help.

Jay Chan

1- if you check the impeller-replace it!
2- service manual should show you what to line up.


wrote in message
oups.com...
I cannot figure out how to put the lower unit back to the motor after I
have removed the lower-unit to check the impeller. I inserted the
drive-shaft back to the hole and lined up the bolt; but I could not put
the lower unit all the way; something got stuck, and I ended up getting
a 1" gap that I could not close. I kept rotating the drive shaft
hoping that this might help the driveshaft to get on gear; but that
didn't help. At one point, I managed to get the gap to close to 1/2"
after spinning the driveshaft; but subsequent attempts of spinning the
driveshaft didn't help. By the way, the gear was at neutral if this
matters.

Am I missing something?

Thanks in advance for any help.

Jay Chan

I forgot to check the shift-shaft. I re-read the SELOC repair manual,
and indeed it mentions about the shift shafe in relation to installing
the lower unit. Unfortunately, it doesn't say where it is and how to
adjust it. I think I will have to order a service manual from Mercury
to know exactly where everything is. Thanks for the pointer.

Jay Chan

Clams Canino wrote:
Shift shaft and water-pipe need to all line up too.

-W

wrote in message
oups.com...
I cannot figure out how to put the lower unit back to the motor after I
have removed the lower-unit to check the impeller. I inserted the
drive-shaft back to the hole and lined up the bolt; but I could not put
the lower unit all the way; something got stuck, and I ended up getting
a 1" gap that I could not close. I kept rotating the drive shaft
hoping that this might help the driveshaft to get on gear; but that
didn't help. At one point, I managed to get the gap to close to 1/2"
after spinning the driveshaft; but subsequent attempts of spinning the
driveshaft didn't help. By the way, the gear was at neutral if this
matters.

Am I missing something?

Thanks in advance for any help.

Jay Chan

Yes, I intended to replace the impeller and the gaskets. But then I
encountered some problem and needed to put this off for a while, and I
need to put the lower-unit back to the way it was. I probably need to
replace it soon or in next spring when I bring the motor to a mechanic.

I will need to order a service manual from Mercury. I cannot find the
necessary info from the repair manual by SELOC. Thanks for the
suggestion.

Jay Chan

Lost In Space/Woodchuck wrote:
1- if you check the impeller-replace it!
2- service manual should show you what to line up.


wrote in message
oups.com...
I cannot figure out how to put the lower unit back to the motor after I
have removed the lower-unit to check the impeller. I inserted the
drive-shaft back to the hole and lined up the bolt; but I could not put
the lower unit all the way; something got stuck, and I ended up getting
a 1" gap that I could not close. I kept rotating the drive shaft
hoping that this might help the driveshaft to get on gear; but that
didn't help. At one point, I managed to get the gap to close to 1/2"
after spinning the driveshaft; but subsequent attempts of spinning the
driveshaft didn't help. By the way, the gear was at neutral if this
matters.

Am I missing something?

Thanks in advance for any help.

Jay Chan

wrote:
On 17 Oct 2006 11:25:18 -0700, "
wrote:

I cannot figure out how to put the lower unit back to the motor after I
have removed the lower-unit to check the impeller. I inserted the
drive-shaft back to the hole and lined up the bolt; but I could not put
the lower unit all the way; something got stuck, and I ended up getting
a 1" gap that I could not close. I kept rotating the drive shaft
hoping that this might help the driveshaft to get on gear; but that
didn't help. At one point, I managed to get the gap to close to 1/2"
after spinning the driveshaft; but subsequent attempts of spinning the
driveshaft didn't help. By the way, the gear was at neutral if this
matters.

Am I missing something?

Thanks in advance for any help.

Jay Chan


Make sure the foot is in neutral if the shifter is in neutral (prop
turns both ways without moving shaft)

What does the "foot" mean? Do you mean the shift rod position matches
what it is supposed to be when the remote-throttle-shift is in the
neutual location? I will need to buy a service manual in order to
figure out the right shift rod position is supposed to be.

What does "propeller turns both ways without moving shaft"? I am not
familiar with how the propeller is supposed to act when we put the
motor in neutral.

Jay Chan

wrote
I will need to buy a service manual in order to
figure out the right shift rod position is supposed to be.

If you said what type drive you have, I overlooked it.

If it's the same as mine, this should help:
http://www.mercstuff.com/waterpumpinst.htm

The illustrations are right out of the Merc service manual.

Prior to reinstalling, the shift lever in the boat is in full forward and
the shift shaft on the LU is rotated full clockwise. An appropriately sized
12 point socket on a nut driver handle makes a good tool for rotating the
shift shaft. The shifter has to be held in position by holding a little
pressure on the prop shaft in the reverse direction, which is best done by a
helper. The LU should go in far enough to start the nuts on the studs before
you meet any serious resistance. The last half inch or so can be tight, but
you should be able to wiggle it into place by hand. You can draw it together
by tightening the nuts, but if you do it that way and it doesn't draw
together smoothly and easily, something's wrong and you need to back off and
start over.

Ernest Scribbler wrote:
wrote
I will need to buy a service manual in order to
figure out the right shift rod position is supposed to be.

If you said what type drive you have, I overlooked it.

If it's the same as mine, this should help:
http://www.mercstuff.com/waterpumpinst.htm

The illustrations are right out of the Merc service manual.

Prior to reinstalling, the shift lever in the boat is in full forward and
the shift shaft on the LU is rotated full clockwise. An appropriately sized
12 point socket on a nut driver handle makes a good tool for rotating the
shift shaft. The shifter has to be held in position by holding a little
pressure on the prop shaft in the reverse direction, which is best done by a
helper. The LU should go in far enough to start the nuts on the studs before
you meet any serious resistance. The last half inch or so can be tight, but
you should be able to wiggle it into place by hand. You can draw it together
by tightening the nuts, but if you do it that way and it doesn't draw
together smoothly and easily, something's wrong and you need to back off and
start over.

Mine is a 1995 Mercury 115hp Outboard (2-stroke, 4-cylinders).

Honestly, I don't fully understand your instruction of handling the
shift shaft. I have ordered a copy of Mercury Service Manual from
Mercury web site. Hopefully, I will fully understand what you said
when I cross-reference your instruction with the service manual.

I appreciate the fact the you have given me a link to a web page about
the water pump in a Mercury lower unit. I will take a look to see if I
understand this. Thanks.

Jay Chan

wrote
Mine is a 1995 Mercury 115hp Outboard (2-stroke, 4-cylinders).

Better stick with your outboard service manual and ignore my sterndrive info
then.

wrote:
I cannot figure out how to put the lower unit back to the motor after I
have removed the lower-unit to check the impeller. I inserted the
drive-shaft back to the hole and lined up the bolt; but I could not put
the lower unit all the way; something got stuck, and I ended up getting
a 1" gap that I could not close. I kept rotating the drive shaft
hoping that this might help the driveshaft to get on gear; but that
didn't help. At one point, I managed to get the gap to close to 1/2"
after spinning the driveshaft; but subsequent attempts of spinning the
driveshaft didn't help. By the way, the gear was at neutral if this
matters.

Am I missing something?

Thanks in advance for any help.

Jay Chan

I finally figure out why I could not get the lower unit all the way up
to meet the rest of the outboard. I forgot to do two things: (1) Push
the shift to forward (2) I need to wiggle the shift shaft a bit to get
it to line up to the shift-shaft-coupler.

Now, I have mounted the lower unit back to the motor.

Thanks.

Jay Chan