Do any of you use this system? I think my neighbors are getting tired of the noise when i get back? If i get the system how do i flush the out drive? do i still use muffs? Thanks

Great system and you can actually flush the engines while in transport home with the proper set on and on-board trailer water. There is some back-flush into the drives and you can use the muffs when you get home to fill the drive without starting.
I have personally seen the difference this system makes over time with one engine using the system and the other flushed with the Muffs on the drives. The manifolds and risers still looked great on the side using the system. The conventional side had lots of rust scale. The system pressure cycles and increases flush pressure to critical areas.

I use this system and I would not have another boat in salt water without one. I usually run my boat for 5-10 mins when I get back just to warm it up, plus I'm a little anal about the old school ways Then I just hook up the guardian and let it run while I wash the boat and trailer.

The system is around $270. but i can never get solid answer from the company about the out drives? (so i guess that means no)? I did order one and will let everyone know......here is there site http://www.mstguardian.com/