Does anyone else think this isn't safe?

LOL. Our saw was quite different that this one, but this is basically the same "Farmall Regular" and shows "what a guy faced" when dealing with a GREAT BIG sawblade

We had one of these that used a big belt to turn a 48" blade on a table with rollers that my Dad would cut planks with.
The one we had, you had to put a 12 guage shotgun blank shell under a scew on cap, turn the engine to just over TDC and hit the cap with a hammer to fire the shell.
That would start the engine turning and it usually started on the first try.

Usually my job was to keep that top tank full of water to cool the cylinder and to keep those caps (red in this picture) full of greas for the crankshaft.
And of course it was running while I was doing it.