I also found good report about BIOfuel tests on Washington State Ferries
I like picture on page 14
http://www.biobor.com/advertising/testi ... pril09.pdf

Hello I reckon your next step is to clean the 2 strainers in the water operation block after this i think the problem will be fixed. cheers first strainer is on the bottom of water pressure regulating valve - not marked and never mentioned in the manual second y-strainer before solenoid block we al...