Has anyone know or have had experience with the MST GUARDIAN engine flushing device? I have a raw water cooled 260 Merc. that I want to berth in salt water next summer for 5 months. <br /><br />I understand that the Guardian will flush the engine with fresh water without the engine running and do it while sitting in salt water.<br /><br />Does it work ???? and are there other alternatives short of fresh water cooling that involve expensive heat exchangers.
