Yanmar Approved Seawater Flush

[chiefrcd]

Apparently after extensive testing Yanmar now sells a sea water side flush for Yanmar engines. This could prove very beneficial for those of us who have Yanmar engines. The product information I received from Mack Boring is as follows:

Name: Ryd-Lyme http://www.rydlyme.com/
Number: 010-MACK1093

I have not used this product, however I have spent about 2300.00 to have some of my cooling componants cleaned out, I have ordered two gallons and will use this within a few weeks.
Wanted to pass on the info.

[Capt Paul]

Chief,

I spent around the same amount this year for the same thing. I am going to look into this for sure.

Paul

[Elizabeth Ann]

Just out of curiosity, how much did this stuff cost & how is it flushed through the engine?

[TonyAmalfitano]

It appears this product could save all of us some cash. Even if I had to remove my heat exchangers and soak them in a bucket of this stuff. Beats shipping them out to Mack Boring to be boiled.

Yeah, how much is this stuff?

[chiefrcd]

From what I gather you pour it into the seacock strainer using the appropriate safety gear ( it is hydrocloric acid and buffers). Then you let it set in the engine a specific amount of time. Since I don't have it, I don't have the instructions that go with it. It's less than 25.00 a gal. and my local Yanmar Service Center recommended 2 gals. to flush my system. From what I gather from the website, it will not damage the engine and cooling system componants but it will pit the pencil zincs which may need to be replaced. All in all if it works and I('m sure that is a big if, even if you paid your Yanmar Center to do the work it would be a heck of a lot cheaper than removing the coolers and having them cleaned, painted and put back on.

[Pitou]

Sounds like some great stuff. I cruised their website and I think I am ready to drink the "purple juice". The testamonials appear pretty convincing.
Currently once a month and after haul out at seasons end I run SALT AWAY through the sea water side of my engine for preventative mainteance. SALT AWAY was recomended by Power Boat Reports, but i do not believe they tested RYDLYME. The process looks more complicated, but appears an annual PM would be sufficient. Here is the URL to their instructions to clean the sea water side. Thanks Chief !

http://www.rydlymemarine.com/pdfs/MARIN ... 20RAW.pdf

[TonyAmalfitano]

I filled out the "Contact Us" form on their web site. Lisa called me back, 4 TIMES! (She has a sweat voice!) I have the info packet in PDF. You can rinse your system, but have to hook up some plumbing to reuse the stuff over and over. It's best to hook up a pump rather then trying to run the engine. OR, you can remove the heat exchanger and soak it in a 50/50 mix. At $23.95 a gal it sure beats sending the exchanger to Mack-Boring to boil it out!

[Merry Kate]

Did this last year and results were awesome. Much easier than pulling the heat-x & sending to the radiator shop. Be aware that rydlyme makes a "marine" formulation that is supposedly kinder to marine metals. At a few bucks more, why take the chance. The rydlyme is something organic (citric acid?) - other than muriatic acid that can be dangerous & damaging.

Here is the setup I rigged:

http://i172.photobucket.com/albums/w35/ ... 0317-1.jpg

used my spare 12V fresh water pump plumbed into the marine gear cooler then out throught the engine heat exchanger at the exhaust elbow outlet. Hardest part was finding all the plumbing fittings to get a good seal on all the hoses. 1 gallon did fine for a Cummins 6B. Let it cycle through for about 2 hrs like the instructions said. Result was like-new raw water side.

Search for rydlyme (or however you spell it) on boatdiesel.com for much more info.

PS: Forgot to say: remove all your zincs before you do this!!