Drop-in Tank Application - for all brands and models including lawnmowers, small generators, snowblowers, power washers and tractors. Engine over 3.5 hp to maximum 25 hp & maximum 5-gallon fuel tank, diesel up to 4 gallons.

Tractors with 2 tanks or exceeding 25HP, must use 2 - F4T applications or Fitch model F5T containing 2 cartridges.