Generally the riders are mostly made by their AYP division in the Orangeburg, SC factory and the walk behinds in the Swannsboro, GA factory.
Simple answer - electrolux, who make nearly all the mowers and garden equipment on the market, e.g. westwood, husqvarna, Concorde - - -
Its hard to answer. E.g. Husqvarna is known for user friendliness and quite good reliability.
The answer is AYP or ElectroluxHome Products. although Husqvarna owns AYP. You can usually use or cross reference parts from husqvarna mowers. Or just go to sears.
AYP Makes Husqvarna and Craftsman tractors
Most likely MTD
the year of a husqvvarna YTH2148B serial no.051404B1971
MTD
Murray?
Ariens
the tractors are mtd, push mowers not sure
Who made Tempo riding mowers
Most Sears Craftsman lawnmowers were made by American Yard Products which has become part of Husqvarna. Some were also made by MTD and Murray.