due to lack of use my fuel is now 6 mos. old and is starting to clog my fuelseps even. I run the engines weekly for an hour but that doesn't seem to be enough. My mechanic says to just run it through the filters (I have 2 racors and 1 alyska filter per engine) and change them often. Should I pay someone to suck the tanks dry (i have about 850 gallons) and refuel or keep running the engines and change filters? Anyone have experience?>: