Looks like a 92508 with the vertical pull starter missing and a Minion (plastic) Vacujet. Not a bad engine, but of course there is no engine like a 92908. I'm guessing about 1982? And is that one of the old thick aluminium bases?

I wonder if you are allowed to put smoked grass in the council garden waste collection? I know there's a lot of demand for grass for smoking, but grass that's already been smoked by the Briggs' exhaust? Not so sure.