Gardenline GPMX246l lawnmower with Briggs & Stratton 575ex engine

Gardenline-branded mower with a Briggs 575ex engine first start, bought on ebay as seller-refurbished, started off smoking a lot as it must have sat tipped forward and oil got into the cylinder and exhaust causing a big cloud on startup! Ran it again an hour later and it was relatively smoke free...