GENIE Garage Door Openers 18004B Capacitor Genie 18004B Garage Door Opener Motor Starting Capacitor. Compatible with ALL Genie 1/3 Horse Power Garage Door Openers except models GPS-700 Stealth, PMX-700 Openers and Excelerator model Garage Door Openers. 50-60 Microfarad (MFD), 220 Volts AC (VAC), 60 Hertz (Hz) Original Genie Replacement Part