Fits 1/4″ Fuel Line Vacuum Pulse Pump. AGAIN, not compatible with more than 10% of ETHANOL but try to use fuel with NO ETHANOL in it for longer lasting life! Here is just some, NOT ALL, just some of the models that use this Fuel pump. 23522 (Brush Cutter) 33522 (Brush Cutter) 74388 (TimeCutter ZS 3200S Riding Mower) 74616 (TimeCutter SS 4216 Riding Mower) 74621 (TimeCutter SS 3200 Riding Mower) 74629 (TimeCutter SS 3216 Riding Mower) 74650 (TimeCutter ZS 3200S Riding Mower) 74655 (TimeCutter ZS 4200S Riding Mower) 74665 (TimeCutter ZS 4200S Riding Mower) 74670 (TimeCutter SW 3200 Riding Mower) 74682 (TimeCutter ZS 3200S Riding Mower) 74684 (TimeCutter ZS 4200S Riding Mower) 74685 (TimeCutter ZS 4200S Riding Mower) 74705 (TimeCutter SS 4200 Riding Mower) 74710 (TimeCutter SS 3225 Riding Mower) 74710TA (TimeCutter SS 3225 Riding Mower) 74711 (TimeCutter SS 4200 Riding Mower) 74720 (TimeCutter SS 4200 Riding Mower) 74725 (TimeCutter SS 4200 Riding 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 25hp QTE452CEM42100 Quest Drive Levers QTE452CEM42200 Quest Drive Levers QTS452CEM34200 Quest Drive Levers QZE452CEM42100 Quest Drive Levers