Suffolk Punch?
 

I've just aquired a suffolk Punch petrol mower but i'm a bit unsure how to
maintain the thing.

I've been told that it isn't 2 stroke and that I should only use unleaded
petrol, the problem is that I don't see anywhere on the mower where I should
check and fill the oil.

Can anyone help me because i don't want to damage it as it is working perfectly
at the moment and I would hate to blow it up through negligence/ignorence.

Kind Regards

Martin