A neighbor garderner who is nearing his nineties gave me his old Murray front-tine tiller (model # 2-13051A) which had lain dormant in his garden shed for years disabled with a set of bad points in the engine.
It's a "forward/reverse" rig powered by a 5 h.p. Briggs 4 cylce with two drive pulleys. The tines are super heavy duty, of heavier gauge metal than you see on any of the brands commonly available today--and I like it a lot.
The tag on the tiller body gives Date of Manufacture as "1264" --but if that means December of 1964 (I had to wash my glasses before I was willing to believe it) then I should not be surprised to find it's on its second engine, which according to the code number stamped on it, is a 1981 model.
Now that I've got the old beast up and running just like new again, I'm hoping there's somebody out there who is maybe around a 150 years old (or better) who can tell me if that black cap I see on the rear of what looks like the chain drive housing is a lubrication port. I assume it's got a chain drive in there by looking at the shape of the case (also of heavy gauge metal with many, many bolts) that contains it.
In short, I have no idea of what the maintenence procedure for this thing may be.