Cleaned the plugs, removed and cleaned carbs, part of one float was lying in the bottom of the bowl in the green gunge, the little pin that holds the float valve on.
All 4 main jets blocked solid, so much for the PO's stated "I had it running the other day"!
Searched in vain throughout my shed for a thing small enough yet strong enough to clear them, remembered a member on this site saying the "E" string off a guitar was ideal, looked in my gat bag and there was an E string, peeled off the gold wire and you get something as strong as Supermans erection but as small as a fleas eyelash ha ha worked a treat.
Squirt of ether (called Start U Bastard, no kidding) and she fired up after about 15 years of a silent death, ran smooth as a sewing machine.
Changed out oil filter and new oil, starts every time, few new problems now that it is running, will ask members.