I have a 1985 300TD converted to run on WVO. It ran great for about a year and then I have been plagued with problems (plugging filters). My oil is liquid gold. I suspected some of the neoprene fuel hose I used was going bad. I drained both tanks ( I have a small diesel tank for starting/purging) and replaced every fuel line and filter. I have been testing the system using diesel only to make sure it all works. I have Kent's little clear filter at the exit of the main (original) tank. It plugs up with what looks like black sand. This is after I drained the tank using the plug at the bottom. Sometimes instead of black sand it looks like black fluffy stuff. What is this? I bought microbe killer just to be sure. My last little clear filter was half plugged at 400 miles. The diesel itself looks great, clear and bright. Help!
Bill Brewer
Tehachapi, CA