American Turbine Question

[1975 WRIEDT MAVRICK]

How do I know or find out what impeller I have in my pump?
Thanks, you guys are great!!!! :)

[DEL51]

pull the bowl off, remove impeller, check for stamping or measure. You might be able to guess based on engine output vs rpm if it is in pretty decent condition. what is your engine size/ mods? What rpm's?