Reply
 
Thread Tools Search this Thread
 
Old 07 September 2014, 10:22   #1
Member
 
jwatson's Avatar
 
Country: UK - England
Town: Saddleworth
Boat name: Local Hero
Make: Avon
Length: 4m +
Engine: Mercury 50hp 3cyl
Join Date: Jun 2014
Posts: 253
Salty deposits in thermostat

I was advised to change the impeller and stat on my new to me mariner 25 just for peace of mind. I've just taken the stat out And it's pretty manky. What looks to be salty deposits. My concern is that there will be more of these deposits inside the engine. Is there any way I can dissolve these? I've soaked the stat in soapy water and it's working fine. The engine pumps loads of water so I'm not overly concerned about the impeller. Click image for larger version

Name:	ImageUploadedByRIB Net1410099712.236544.jpg
Views:	163
Size:	125.4 KB
ID:	98613
__________________

__________________
jwatson is offline   Reply With Quote
Old 07 September 2014, 10:51   #2
Member
 
Country: UK - Wales
Town: abergele
Boat name: all mine
Make: ribtec 3m
Length: 3m +
Engine: tohatsu 9.8 hp 2st
Join Date: Sep 2012
Posts: 275
clean it useing white vinegar, and test in hot water with with a thermometer to check its opening at the correct temp.
__________________

__________________
slate1234 is offline   Reply With Quote
Old 07 September 2014, 11:28   #3
Member
 
Country: UK - England
Town: Sussex
Boat name: Bombard, Y-162
Make: Aerotec 380, Y-Class
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 2,691
It's not too bad (but perhaps best to replace periodically anyway), clean it off as well as the mounting face on the engine and use the old gasket as a template to cut a new one from gasket paper (eBay or local motor factor). Job done.
__________________
Max... is online now   Reply With Quote
Old 07 September 2014, 14:14   #4
Member
 
jwatson's Avatar
 
Country: UK - England
Town: Saddleworth
Boat name: Local Hero
Make: Avon
Length: 4m +
Engine: Mercury 50hp 3cyl
Join Date: Jun 2014
Posts: 253
Cheers guys. What can be done for the internal canals of the block ?
__________________
jwatson is offline   Reply With Quote
Old 07 September 2014, 15:31   #5
Member
 
Landlockedpirate's Avatar
 
Country: UK - England
Town: St Helens
Boat name: Wine Down
Make: Maxum
Length: 8m +
Engine: Inboard
Join Date: Apr 2012
Posts: 934
I use Rydlyme, works well and only takes an hour to do. I have made a closed circuit system to run it through the engine.
http://http://www.rydlymemarine.co.uk/
__________________
Landlockedpirate is offline   Reply With Quote
Old 07 September 2014, 16:11   #6
Member
 
jwatson's Avatar
 
Country: UK - England
Town: Saddleworth
Boat name: Local Hero
Make: Avon
Length: 4m +
Engine: Mercury 50hp 3cyl
Join Date: Jun 2014
Posts: 253
Fantastic. How does your closed loop system work?
__________________
jwatson is offline   Reply With Quote
Old 07 September 2014, 17:25   #7
Member
 
biffer's Avatar
 
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
Run it up in a tub and make sure the tell tale goes back in the tub. Closed system.
__________________
biffer is offline   Reply With Quote
Old 07 September 2014, 17:58   #8
Member
 
jwatson's Avatar
 
Country: UK - England
Town: Saddleworth
Boat name: Local Hero
Make: Avon
Length: 4m +
Engine: Mercury 50hp 3cyl
Join Date: Jun 2014
Posts: 253
I assumed that but thought the volume of water required would dilute the solution too much.
__________________
jwatson is offline   Reply With Quote
Old 07 September 2014, 19:03   #9
Member
 
biffer's Avatar
 
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
Just leave it running for a while. Doesn't need a load of water as long as it's covering the intake. When I was in the Middle East I've seen them put an outboard in a plastic bag and fill it up with water. Just enough to cover the intake
__________________
biffer is offline   Reply With Quote
Old 08 September 2014, 07:40   #10
Member
 
Phil M's Avatar
 
Country: UK - England
Town: Whitehaven
Boat name: Pegasus
Make: Zodiac Pro 530
Length: 5m +
Engine: 115hp Merc 4st
Join Date: Oct 2012
Posts: 337
I took the lower leg of my mariner 75 and stuffed a short piece of hose over the eater tube (that normally connects to the pump output). I then used a sump pump to run a mixture of malt vinegar and water through the engine, catching all of the water in a big bucket/trug to allow it to re-circulate. It ran for several hours and took a lot of crap out of the engine. The only down side was a severe craving for chips.

If you test the thermostat, do it by putting it in cold water and gently adding hot. I'm told dropping it on very hot water can damage them. New ones are pretty cheap though, so probably worth replacing periodically.

Phil M
__________________

__________________
Phil M is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 10:16.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.