There's a couple of setups that might match your Lister 35va. Chances are the serial number of the motor will give you info.I bought a s/h 35Kva 3-phase generator maybe 30 years ago. It only gets used about a couple of hours every fortnight, but other than new oil and filters I've not had to do anything to it. Its powered by a 4 cylinder air cooled Lister diesel, I think 5 or 6 litre, so it is very noisy, but surprisingly economical to run.