Ran a search for the superflush kit on OSO. Results came up but several years old. Anyone currently running this system? I like the fact you don't have to run the engines.

http://www.superflushsales.com/sf-500hp_performance.htm

Had the same units on a pair of HP500's a few years ago. tried to use them a few times, not happy. After using them the last time, I used the regular flush system hooked up to the hose and still got salt water out of the pipes. Be careful.

I have been using SuperFlush since 2006, and I am very happy with it.
However I am boating in brackish water so the salt concentration is fairly low, so it is more difficult to determine the effectiveness of the flushing.

But for me it really seems to work well and I am very happy with it.