Fresh water flush Yanmar diesel - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 17 Old 11-03-2011
Member
 
Join Date: Jun 2008
Location: Milford, ct
Posts: 62
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 8
 
+1
jkimberly is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 17 Old 11-03-2011
Junior Member
 
Join Date: Sep 2007
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Just the answers I was looking for, I have the same problem in a Yanmar 2QM20 I am rebulding. Will try to descale it with oxalic acid.
raranovich is offline  
Quote Quick Reply Share with Facebook
post #13 of 17 Old 11-06-2011
Senior Member
 
Join Date: Dec 2002
Posts: 118
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
Rydlyme for Yanmar cooling systems

Rydlyme is the preferred choice for Yanmar cooling systems.
Too strong an acid will eat the exchanger and you'll find yourself with an expensive part to buy.

The heat exchangers found on Perkins,Universal and Westerbekes are much more durable.

However more care is needed on Yanmar Heat Exchangers

I prefer to dissasemble the heat exchanger.
Physically remove all blockage then soak in Rydlyme.
Works every time
chuck711 is offline  
Quote Quick Reply Share with Facebook
post #14 of 17 Old 11-06-2011
Senior Member
 
LakeSuperiorGeezer's Avatar
 
Join Date: Oct 2010
Posts: 551
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
 
Engine corrosion is complex. Look at this: Corrosion in Salt Water Marine Engines
LakeSuperiorGeezer is offline  
Quote Quick Reply Share with Facebook
post #15 of 17 Old 11-06-2011
Senior Member
 
Join Date: Dec 2002
Posts: 118
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
Overheating

Saildrives have a reputation for restricting cooling water flow due to growths
and need to be cleaned out from time to time.
chuck711 is offline  
Quote Quick Reply Share with Facebook
post #16 of 17 Old 11-06-2011
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,487
Thanks: 0
Thanked 94 Times in 85 Posts
Rep Power: 8
   
Rydlyme is hydrochloric acid based with added wetting and penetration agents. I will be trying it on my Yanmar in the near future.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #17 of 17 Old 11-07-2011
Senior Member
 
RichH's Avatar
 
Join Date: Jul 2000
Location: Pennsylvania
Posts: 3,388
Thanks: 23
Thanked 142 Times in 132 Posts
Rep Power: 15
 
RydLyme is a *buffered* hydrdochloric acid. The buffering agent prevents the reduction of the normally formed protective 'black' (ferrous) rust into destructive 'red (ferric) rust ... so that you can descale the carbonate formations ... and with minimal attack of the engine's base metal. Simple speak: RydLyme and other buffered descaling agents remove the 'insoluble salts' but not (much of) the 'metals'. Straight unbuffered HCl will bore through the carbonates, through the 'rust' and into the metal ... and since cast iron is typically a 'stratified' casting (like an onion) once you penetrate one of these 'onion layers' you promote 'slab rust' - large 'plateletts' of ferric rust that can loosen and migrate further into the engine and exhaust manifold and can cause partial or total blocking of the cooling circuit.

Oxalic is 'too weak' an acid to adequately react with the formed carbonates .... the 'reactivity' of oxalic vs. carbonates will require an immense amount of 'oxalic' or 'vinegar' to do the job.
RichH is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Smelly water from fresh water tank Bruce_Olson Gear & Maintenance 20 09-01-2007 04:42 PM
Fresh water system maureena5 Gear & Maintenance 6 03-07-2007 06:34 PM
Fresh Water System Cleaning and Maintenance kcoffey Gear & Maintenance 2 07-13-2004 12:36 PM
MD3B Volvo-Penta sea water to fresh water conversion slosharron Gear & Maintenance 20 06-17-2003 09:08 PM
fresh water tank, tastes like ****! nauticalrich Gear & Maintenance 6 05-24-2002 04:17 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome