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#11706986 - 07/06/16 08:30 AM 200 Merc Water Pump Sealer Question
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 128
Loc: Longview, Tx
When replacing the water pump housing, impeller, and associated gaskets from the repair kit...should you use any type sealer on the gaskets themselves? same question with new thermostats. Any sealer on the rubber grommet that surrounds the thermostat before insertion back into the head?
Thanks in advance for the help....

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#11707178 - 07/06/16 09:55 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
bronco71 Offline
Extreme Angler

Registered: 02/05/06
Posts: 1049
Loc: Farmers Branch/Sulphur Bluff
No, none on the gaskets or the thermostat seals. You should see where there was a wall of sealer blocking the exhaust from the water pump, this needs to be replaced when you put it back together by building a dam of sealer that will contact the upper when put together. I use high heat silicone type sealer on mine....

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#11707245 - 07/06/16 10:23 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 128
Loc: Longview, Tx
Perfect reply!! Thank you Bronco. I thought I was on the right track with no sealer. And yes I built up the silicone on the divider plate. Thanks for your response..

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#11709154 - 07/07/16 07:12 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 10516
Loc: Littlefield Tx & Lake A. H. US...
How are you keeping the water pump housing and plate gasket in place? You have to use some kind of adhesive.
_________________________
“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” GOD IS GOOD

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#11711542 - 07/08/16 07:23 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
sbump26 Offline
Extreme Angler

Registered: 03/10/04
Posts: 1863
Loc: Arlington, TX
What do you use Gary?
_________________________
Put the plug in.

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#11711632 - 07/08/16 08:17 AM Re: 200 Merc Water Pump Sealer Question [Re: gary purdy]
TLW Online   content
Extreme Angler

Registered: 11/16/06
Posts: 2004
Loc: ft worth
Originally Posted By: gary purdy
How are you keeping the water pump housing and plate gasket in place? You have to use some kind of adhesive.


???

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#11713359 - 07/09/16 08:06 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 10516
Loc: Littlefield Tx & Lake A. H. US...
GM gasket adhesive. Best stuff I have ever found.
_________________________
“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” GOD IS GOOD

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#11713459 - 07/09/16 09:33 AM Re: 200 Merc Water Pump Sealer Question [Re: gary purdy]
TLW Online   content
Extreme Angler

Registered: 11/16/06
Posts: 2004
Loc: ft worth
Originally Posted By: gary purdy
How are you keeping the water pump housing and plate gasket in place?


confused a little here?.. sure ya thinkin' merc V6?.. might wanna revisit that... three studs plus two "tits" on tha base that keep everything in place... merc recommends a teflon lubricant only on tha drive shaft seals, o-ring and impeller....


Edited by TLW (07/09/16 09:42 AM)

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#11713510 - 07/09/16 10:21 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 10516
Loc: Littlefield Tx & Lake A. H. US...
You evidently have never had the impeller catch the gasket during an impeller install, I have years ago and then you get to do it all again. Mercury also says to replace all of the gaskets and use a non-mineral base lubricant. Where does his post say a 2.4 or 2.5 Merc?
_________________________
“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” GOD IS GOOD

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#11713554 - 07/09/16 10:53 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
TLW Online   content
Extreme Angler

Registered: 11/16/06
Posts: 2004
Loc: ft worth
200 merc... never mind.....................

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#11715697 - 07/10/16 07:40 PM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 128
Loc: Longview, Tx
Motor is a 1995 mercury 200 Xri 2.5 Liter fuel injected

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#11715948 - 07/10/16 10:02 PM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
TLW Online   content
Extreme Angler

Registered: 11/16/06
Posts: 2004
Loc: ft worth
i vote no... never have, never will.. as you will see every part "stacks up" on tha studs and two tits... no way they can move when installed right... jmo

2-4-C With Teflon (92-825407A12) used on o-ring and seals (rubber only)


Edited by TLW (07/10/16 10:16 PM)

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#11716248 - 07/11/16 07:55 AM Re: 200 Merc Water Pump Sealer Question [Re: tdavis184]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 10516
Loc: Littlefield Tx & Lake A. H. US...
Originally Posted By: tdavis184
Motor is a 1995 mercury 200 Xri 2.5 Liter fuel injected
That would have been good info in the original post.
_________________________
“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” GOD IS GOOD

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