Push and self-propelled mowers
Reliable:
Craftsman, Honda, and Toro for push and self-propelled; Yard Machines/Yard-Man for push; and Troy-Bilt for self-propelled
Among the more repair-prone:
John Deere for self-propelled
Most repair-prone:
Lawn-Boy for push mowers
Lawn tractors
Reliable:
Craftsman, John Deere, Husqvarna, Simplicity
Among the more repair-prone:
Troy-Bilt and Yard Machines/Yard-Man by MTD