Maybe I'm wrong but I would assume that the Kawasaki FJ 180V KAI engine would be the same engine regardless of what it was on, so according to a Toro site the Model 22189 21" commercial mower which has a 6.0 hp Kawasaki FJ180V KAI engine, Self Propelled, Blade Brake Clutch (BBC). Now I'm assuming this would be the same engine that Exmark is listing for there mower?
G & G Lawn Care
2013 F 150 XLT 4x2 Super Crew
Mowers: Toro Z-Master 2000 48" Toro GS 36" Toro TurfMaster 30"
Blowers:Stihl BR 600 BR 600 BR 200 Trimmers: Stihl FS 110 Stihl FS 90
Edgers: Stihl FC 90&75 Echo BRD 280 Pole Saw: Stihl HT 75 Hedge Trimmer: Stihl HL 45 HS 45