Earthquake and Mantis are good brands of mini tillers, according to Garden Tiller Reviews. Models from these manufacturers have consistently favorable ratings for stability, size and maneuverability.
Earthquake manufactures mini tillers with two- and four-cycle Viper engines. The most powerful model is the MC440, which features multiple speed settings and reversible tines. The MC440 weighs 33 pounds and has a maximum tilling depth of 8 inches.
Mantis produces two gas-powered mini tillers. The larger model is the 7262, which weighs 24 pounds and has a four-cycle Honda engine. This machine has a tilling width of 9 inches making it ideal for use in narrow spaces, writes Garden Tiller Reviews.