Engine Flush Recommendations

[rognvald]

Any brand recommendations for a quality engine flush for my Yanmar 3GM30F (fresh water cooled) engine? I used a Prestone flush the last time. Anything better? Thanks.

[Lepke]

I use: RYDLYME Marine: The Ultimate Biodegradable Marine Descaler! | RydLyme Marine.

It's biodegradable, unlike most automotive products. I use it on both the salt and fresh water sides. You can buy on ebay or amazon. PDF attached.