bcs tractor with lombardini diesel engine

my bcs 715 walk behind tractor with a lombardini tipo 520 diesel engine that i use to till my garden.

[@shanes736]

Where is the engine oil drain plug on this model??

[@trencherguytronco3784]

I just bought one of this but the guy bought it from he say the was running like a year ago but now can't make run any help please?