Depends on what jacuzzi you have if it is the wj it is a mixed flow it can made to work well.If it is the golden eagle(axial flow you will need to get the energizer kit then go from there.You can tell the two from the handhole cover the golden eagle is on the outside the wj is on the inside.
I have the golden eagle on my boat with a healthy motor but i do have the energizer kit on it about all that is left from the original kit is the bowl and shaft.the nozzle has been replaced with a diverter and now running a legend impeller.the nozzle that comes with the american turbine was poor quality and kept coming loose.I am very happy with the performance of it now.
You can ask rtjas about the hawaians he has one and knows more about them.