fit two agglomerators and a change over switch , its a cheap version of a racor twin set up , as soon as it splutters flip the lever and keep going clean the offending agglomerator and repeat , I used that set up and packed the water separator part with plastic pan scrubs , it worked the very best , I had big tanks and they had 1200 gallons of fuel in them ,,, and diesel bug. I treated the fuel and polished it from one tank to another and eventually it got lots better , but it never actually got cured . Same engines by the sound of it , badged as Parsons , but just old d series marinised .