very simple hook it up to crank case pressure you will have to drill and tap an pressure fitting on the backplate, on my OS 160 I used a pressure fitting for the OS 140 and drilled the top left backplate screw with a 1/16 bit, one fuel line from the tank to the pump then to the carb I use a 3 line tube tank one for fill and the other is vented to the atmosphere, what engine are you using the perry pump is very good once set, theres nothing else to do, have 100's of flights on mine and no problems at all