Biodiesel is actually a strong solvent. You have to replace some rubber lines with special ones (can't remember the types right off my head) They will actually clear all the **** out of your fuel lines and injectors. On old dirty diesels (like real old, not like 2 years) this can actually cause a problem as the gunk will stop it up a little bit until it all goes through. With a new JD it should run fine... shame folks don't run it in their deuces and 5 tons...
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