Why do some VO systems have a backflush feature?
This has to do with the properties of vegetable oil. When hot, its a great lubricant for moving engine parts, and it burns beautifully. But when cooling, VO can leave a nasty residue in fuel lines, injectors, and filters. To say nothing of what happens when it gets cold and solidifies! The backflush or purge setting of a VO system actually takes diesel fuel and pushes it backwards through the injectors, veggie fuel filter, and veggie fuel lines, all the way back to the veggie tank. When the engine is shut down, the fuel system is flushed with diesel and ready for the next start-up. • Does a VO system require added maintenance? Youll need to change your VO filter from time to time, follow the manufacturer recommendations for running the system, and monitor the quality of your VO. These 3 things will go a long way towards keeping your system trouble-free.
