Water Pump Replacement '99 Merc 150
 

Well boys, I got a late start because of rain and it rained on me for a few minutes while working, but it is done.

The key to this job was having a good helper.

http://i145.photobucket.com/albums/r...r/101_0102.jpg

That plus being able to phone friends while I was in the yard rasslin that sucker. *(Thanks Lord Skools) *Another mechanic friend helped me by pulling up diagrams on the computer while I was at the motor.

Once I found all the bolts holding on the gearcase (there are 7 in a Merc 150) it slid right off.

http://i145.photobucket.com/albums/r...r/101_0107.jpg

The good news was that the old waterpump looked fine.....that is also the bad news, I was hoping it was crap and I would solve my overheat problem. *There were plenty of signs that the motor had sucked up sand.


http://i145.photobucket.com/albums/r...r/101_0111.jpg


http://i145.photobucket.com/albums/r...r/101_0109.jpg

Putting the motor in forward gear was the trick, it all went back together real smooth.

http://i145.photobucket.com/albums/r...r/101_0112.jpg

http://i145.photobucket.com/albums/r...r/101_0113.jpg

And the results?

I don't know, it got time for church so I will have to test it out in the morning.

Water Pump Replacement '99 Merc 150
 

Well boys, I got a late start because of rain and it rained on me for a few minutes while working, but it is done.

The key to this job was having a good helper.

http://i145.photobucket.com/albums/r...r/101_0102.jpg

That plus being able to phone friends while I was in the yard rasslin that sucker. *(Thanks Lord Skools) *Another mechanic friend helped me by pulling up diagrams on the computer while I was at the motor.

Once I found all the bolts holding on the gearcase (there are 7 in a Merc 150) it slid right off.

http://i145.photobucket.com/albums/r...r/101_0107.jpg

The good news was that the old waterpump looked fine.....that is also the bad news, I was hoping it was crap and I would solve my overheat problem. *There were plenty of signs that the motor had sucked up sand.


http://i145.photobucket.com/albums/r...r/101_0111.jpg


http://i145.photobucket.com/albums/r...r/101_0109.jpg

Putting the motor in forward gear was the trick, it all went back together real smooth.

http://i145.photobucket.com/albums/r...r/101_0112.jpg

http://i145.photobucket.com/albums/r...r/101_0113.jpg

And the results?

I don't know, it got time for church so I will have to test it out in the morning.

Re: Water Pump Replacement '99 Merc 150
 

What did the old impellor look like when you removed it from the housing. Did the vanes pop out or stay laid over? The vanes have to spring out to work properly. The pumps don't really wear per say, they more or less lose there elasticity and quit pumping.

Re: Water Pump Replacement '99 Merc 150
 

What did the old impellor look like when you removed it from the housing. Did the vanes pop out or stay laid over? The vanes have to spring out to work properly. The pumps don't really wear per say, they more or less lose there elasticity and quit pumping.

Re: Water Pump Replacement '99 Merc 150
 

Randleman, Great work. Good job on talking him through SKOOL. Hope that fixed the problem. Keep us posted. Wishing for the best for ya Brother. ;)

Re: Water Pump Replacement '99 Merc 150
 

Randleman, Great work. Good job on talking him through SKOOL. Hope that fixed the problem. Keep us posted. Wishing for the best for ya Brother. ;)

Re: Water Pump Replacement '99 Merc 150
 

The vanes on the old one popped out straight and were pliable, but who knows, maybe it needed replacing.

Re: Water Pump Replacement '99 Merc 150
 

The vanes on the old one popped out straight and were pliable, but who knows, maybe it needed replacing.

Re: Water Pump Replacement '99 Merc 150
 

It worked!!!!! No overheat warning after 30 mins running on the hose.

See my post in "Calling all Merc Mechs" for more.

Re: Water Pump Replacement '99 Merc 150
 

It worked!!!!! No overheat warning after 30 mins running on the hose.

See my post in "Calling all Merc Mechs" for more.

Re: Water Pump Replacement '99 Merc 150
 

Good job Randleman. Now come up and replace mine . ;D

Re: Water Pump Replacement '99 Merc 150
 

Good job Randleman. Now come up and replace mine . ;D

Re: Water Pump Replacement '99 Merc 150
 

hey this may sound crazy but was the shaft keeper in the old impeller? i was wondering if they had replaced the pump with new and forgot to install that and maybe the drive shaft was slipping inside the pump impeller? i've seen that happen before should have told you check that too.

Re: Water Pump Replacement '99 Merc 150
 

hey this may sound crazy but was the shaft keeper in the old impeller? i was wondering if they had replaced the pump with new and forgot to install that and maybe the drive shaft was slipping inside the pump impeller? i've seen that happen before should have told you check that too.

Re: Water Pump Replacement '99 Merc 150
 

It was there, but when I pulled the housing off the impeller stayed inside it so I am not sure if it was in there correctly or not.

Re: Water Pump Replacement '99 Merc 150
 

It was there, but when I pulled the housing off the impeller stayed inside it so I am not sure if it was in there correctly or not.

Re: Water Pump Replacement '99 Merc 150
 

You can do it, all you need is a few wrenches and the locations of all the stinking bolts.

Re: Water Pump Replacement '99 Merc 150
 

You can do it, all you need is a few wrenches and the locations of all the stinking bolts.

Re: Water Pump Replacement '99 Merc 150
 

oh ok yeah alot of people miss getting that hooked up correctly too. i'd hang on to that impeller if it's soft.

Re: Water Pump Replacement '99 Merc 150
 

oh ok yeah alot of people miss getting that hooked up correctly too. i'd hang on to that impeller if it's soft.

Re: Water Pump Replacement '99 Merc 150
 

It will go with the motor when I sell it.

Re: Water Pump Replacement '99 Merc 150
 

It will go with the motor when I sell it.

Re: Water Pump Replacement '99 Merc 150
 

Those things can look just fine but if they have any grooving at all it can cause them to fail. I have replaced them thinking I was wasting my time but it ended up solving my problem as did yours. I would throw the part away *if it stoped your over heating why give them to someone who may install it to give them problems. Its always nice when its an easy fix. That Merc pump and set up looks allot like the one on my 1994 150 Johnson.

Re: Water Pump Replacement '99 Merc 150
 

Those things can look just fine but if they have any grooving at all it can cause them to fail. I have replaced them thinking I was wasting my time but it ended up solving my problem as did yours. I would throw the part away *if it stoped your over heating why give them to someone who may install it to give them problems. Its always nice when its an easy fix. That Merc pump and set up looks allot like the one on my 1994 150 Johnson.

Re: Water Pump Replacement '99 Merc 150
 

Re: Water Pump Replacement '99 Merc 150
 

Re: Water Pump Replacement '99 Merc 150
 

nice work you can now breathe and official sigh of relief ;D ;)

Re: Water Pump Replacement '99 Merc 150
 

nice work you can now breathe and official sigh of relief ;D ;)

Re: Water Pump Replacement '99 Merc 150
 

Way to go RB! I know you probably already know this, but it is wise to replace the impeller every year for salt and every 2 years for fresh water, so I've always heard.

So, didja miss a bolt at first and think it was stuck? I did that my first time. It does help to get all the bolts out before you try to remove it. ;D

You are now the official Wellcraft V20 Mercury impeller subject matter expert. ;) Where are you taking her this weekend?

Re: Water Pump Replacement '99 Merc 150
 

Way to go RB! I know you probably already know this, but it is wise to replace the impeller every year for salt and every 2 years for fresh water, so I've always heard.

So, didja miss a bolt at first and think it was stuck? I did that my first time. It does help to get all the bolts out before you try to remove it. ;D

You are now the official Wellcraft V20 Mercury impeller subject matter expert. ;) Where are you taking her this weekend?

Re: Water Pump Replacement '99 Merc 150
 

I am no expert, just lucky and dumb.

Yes, I thought the "hidden" bolt was the one holding the trim tab on, but the hidden bolt is hidden under the trip tab.

It will probably be Monday or Tuesday, the weekend is no good for me.

Re: Water Pump Replacement '99 Merc 150
 

I am no expert, just lucky and dumb.

Yes, I thought the "hidden" bolt was the one holding the trim tab on, but the hidden bolt is hidden under the trip tab.

It will probably be Monday or Tuesday, the weekend is no good for me.

Re: Water Pump Replacement '99 Merc 150
 

Here's a pic of the sand comming out.

http://i145.photobucket.com/albums/r...r/101_0117.jpg

Re: Water Pump Replacement '99 Merc 150
 

Here's a pic of the sand comming out.

http://i145.photobucket.com/albums/r...r/101_0117.jpg

Re: Water Pump Replacement '99 Merc 150
 

It looks like the last time out she sucked up a ton of sand, must have wiped out the pump then and that was the end for the last owner!

His loss and your gain!

But I hope all the sand came out cause it was pushed out by the new pump, and there was nothing left in there to hurt the new pump.
Which I am sure is the case cause you cleaned out the lower unit when you changed everything.

You be good to go now!! ;D

Re: Water Pump Replacement '99 Merc 150
 

It looks like the last time out she sucked up a ton of sand, must have wiped out the pump then and that was the end for the last owner!

His loss and your gain!

But I hope all the sand came out cause it was pushed out by the new pump, and there was nothing left in there to hurt the new pump.
Which I am sure is the case cause you cleaned out the lower unit when you changed everything.

You be good to go now!! ;D

Re: Water Pump Replacement '99 Merc 150
 

That previous owner (With his fake Italian marble countertop install), probably just powered through the sandbars when he hit them instead of trimming up or trying to float off!

Re: Water Pump Replacement '99 Merc 150
 

That previous owner (With his fake Italian marble countertop install), probably just powered through the sandbars when he hit them instead of trimming up or trying to float off!

Re: Water Pump Replacement '99 Merc 150
 

I believe you are right.

Thursday is the day for the lake test run.....I hope.

Re: Water Pump Replacement '99 Merc 150
 

I believe you are right.

Thursday is the day for the lake test run.....I hope.