Hi JanGeo - ?certain combinations of fuel input caused loss of combustion?
Yeah , I saw that too
...
While it may indeed be able to run on almost any combination of fuel liquid you still have to remember the air fuel ratio.
I think he turned on 2 fuel pumps at the same time leading into an excessively rich condition causing a drop in power.
Also another issue would be that thick fuels like diesels and home made biodiesels can be very thick.
This would probably need different pump , hose diamter , maybe heating (normal in diesles) and fuel jet diameters. (does he use jets?) than a thin fuel like gasoline.
He's probably thought about this already (40 yrs experience) . so he may have seperate tanks and delivery systems depending on the type of fuel.
Which would mean no diesel in the gas tank , and vici verca.