Descaling yanmar 2 cylinders raw water cooling

[Avi]

Hello, I need to descale my 1979 yanmar 2qm15 . I have a raw water cooling system. How exactly I do it? Can anyone explain to me the process?
Can I use a mix of vinegar or it has to be a specialty marine descaler solution.
Thanks

 

[Ziggler]

look up product:"salt Away". don't know about vinegar. I used salt away on my yanmar 3gmd raw water engine.