Thanks, Lepke! You heat the engine to 180, then suck in your Rydlyme, then let it soak for 6 hours, yes?No Cats, but I circulate just like raw water. Either with a bucket, pump, and temporary ports or hot. Hot I use an old impeller, run the engine, same bucket, no pump. I run until the engine reaches 180°, then shut down and let it soak. It cleans much faster at temp.
Thinking of installing keel coolers at next haul out.