Fits a 1/4″ fuel line vacuum pulse pump. AGAIN, not compatible with fuels containing more than 10% ETHANOL, but try using ETHANOL-FREE fuel to extend the life! Here are just a few, NOT ALL, just a few models that use this fuel pump. 23522 (Brush Cutter) 33522 (Brush Cutter) 74388 (TimeCutter ZS 3200S Lawn Mower) 74616 (TimeCutter SS 4216 Lawn Mower) 74621 (TimeCutter SS 3200 Lawn Mower) 74629 (TimeCutter SS 3216 Lawn Mower) 74650 (TimeCutter ZS 3200S Lawn Mower) 74655 (TimeCutter ZS 4200S Lawn Mower) 74665 (TimeCutter ZS 4200S Garden Lawn Mower) 74670 (TimeCutter SW 3200 Garden Lawn Mower) 74682 (TimeCutter ZS 3200S Garden Lawn Mower) 74684 (TimeCutter ZS 4200S Garden Lawn Mower) 74685 (TimeCutter ZS 4200S Garden Lawn Mower) 74705 (TimeCutter SS 4200 Garden Lawn Mower) 74710 (TimeCutter SS 3225 Garden Lawn Mower) 74710TA (TimeCutter SS 3225 Garden Lawn Mower) 74711 (TimeCutter SS 4200 Garden Lawn Mower) 74720 (TimeCutter TimeCutter SS 4200 Lawn Mower) 74725 (TimeCutter SS 4200 Garden Lawn Mower) 74750 (TimeCutter MX 3450 Riding Mower) 74765 (TimeCutter MX 4200 Riding Mower) 74780 (TimeCutter SW 3200 Riding Mower) 74781 (TimeCutter SW 3200 Riding Mower) 75740 (TimeCutter 4200 Riding Mower) Fits Exmark Models Exmark Lazer Z 60″ Kohler Command 25 HP QTE452CEM42100 Quest Drive Levers QTE452CEM42200 Quest Drive Levers QTS452CEM34200 Quest Drive Levers QZE452CEM42100 Quest Drive Levers