New style sea water pump
04-18-2006 | 06:01 PM
#11
32' SUNSATION
Joined: Feb 2001
Posts: 1,143
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From: MA
Re: New style sea water pump
Originally Posted by JS232
I have read that you better remove the pump WITH the braket. I am doing mine Saturday. Do yours on Friday 
I know one thing for sure. If the housing is scared up. I will be brazing and having one of the boys re- surface gride rather than buy a new one
Save your parts. I will have them fixed for you so you can have a spare for next season.
04-23-2006 | 10:53 AM
#12
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Joined: Mar 2003
Posts: 1,044
Likes: 1
From: Montreal,Quebec
Re: New style sea water pump
Job done!
Here are some shots of the disassembled pump... I was wondering about the Housing shape (Elliptic form). Apparently, it's the original design. I found very light worn on the back late (like you'l find on a disk brake rotor) I decided to leave it like that. After 200 hours, the impeller was in PERFECT shape except it had lost some of it's original flexibility(picture 1).
Here are some shots of the disassembled pump... I was wondering about the Housing shape (Elliptic form). Apparently, it's the original design. I found very light worn on the back late (like you'l find on a disk brake rotor) I decided to leave it like that. After 200 hours, the impeller was in PERFECT shape except it had lost some of it's original flexibility(picture 1).
04-23-2006 | 11:02 AM
#13
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Joined: Mar 2003
Posts: 1,044
Likes: 1
From: Montreal,Quebec
Re: New style sea water pump
The worst part is to remove the screws retaining the two hoses behind the pump. I know that some mechanics removed the fuel/water separator assy to do so. NO WAY for me... I don't wanna mess with gas! 
You'l need PLENTY of small tools to get you there. I used a very small box wrench and PATIENCE!
Once you are there, take the time to tighten all the clamps you can find on the engine ( mine were all loose including the ones on the sea water pump! )
You'l need PLENTY of small tools to get you there. I used a very small box wrench and PATIENCE!
Once you are there, take the time to tighten all the clamps you can find on the engine ( mine were all loose including the ones on the sea water pump!
)
04-23-2006 | 11:10 AM
#14
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Joined: Mar 2003
Posts: 1,044
Likes: 1
From: Montreal,Quebec
Re: New style sea water pump
The pump came out on her bracket. Two retaining nuts were removed off the engine. The merc's exploded view did'nt really help me. You'l found them easily. You'l notice that the sea water pump bracket sits behind the idle pulleys bracket and shares a boat with it. Which means that I had to remove it (there is another retaining bolt on top of the idle pulleys bracket)
Last edited by JS232; 04-23-2006 at 11:15 AM.
04-24-2006 | 11:18 AM
#15
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Joined: Jan 2004
Posts: 2,777
Likes: 12
From: San Diego, California
Re: New style sea water pump
Just so you guys can benefit a little from our expierences. Be careful when you replace the impellor only in the new 496 raw water pump. The impellor has a tendency to groove the cover quite a bit and as soon as its fairly considerable, the water pressure starts to drop off quite a bit. If you want to save some money versus buying a new pump and this is the problem, take the cover to a good welding shop, have the cover brazed back thicker and then resurface it and you've still probably saved yourself about $300 bucks! Just a tip.
Ray @ Raylar
Ray @ Raylar
04-24-2006 | 12:42 PM
#16
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Joined: Sep 2005
Posts: 1,987
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From: Missouri
Re: New style sea water pump
Originally Posted by BAJA H2X 99
Has anyone taken apart new syle all brass housing sea water pump? One with single point drain system. Have 496 HO's closed cooling system. Tried to start up boat with water hose. Found that it was not pumping any water. After taking apart to replace impeller found the brass housing was badly worn. This is a 2005 boat with 98 hours. Has anyone else run into this problem? Maybe no one has noticed because of running while in water.
04-24-2006 | 12:44 PM
#17
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Joined: Sep 2005
Posts: 1,987
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From: Missouri
Re: New style sea water pump
Originally Posted by Dixie Doug
That pump should still be under warranty.We have seen this before ,See your dealer.
04-24-2006 | 12:45 PM
#18
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Joined: Sep 2005
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From: Missouri
Re: New style sea water pump
Originally Posted by GOODT
very common see it all the time
04-24-2006 | 12:46 PM
#19
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Joined: Sep 2005
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From: Missouri
Re: New style sea water pump
Originally Posted by JS232
Job done!
Here are some shots of the disassembled pump... I was wondering about the Housing shape (Elliptic form). Apparently, it's the original design. I found very light worn on the back late (like you'l find on a disk brake rotor) I decided to leave it like that. After 200 hours, the impeller was in PERFECT shape except it had lost some of it's original flexibility(picture 1).
Here are some shots of the disassembled pump... I was wondering about the Housing shape (Elliptic form). Apparently, it's the original design. I found very light worn on the back late (like you'l find on a disk brake rotor) I decided to leave it like that. After 200 hours, the impeller was in PERFECT shape except it had lost some of it's original flexibility(picture 1).
