Just a suggestion, from some advise that was given to me by the master mechanic
at a very good yard in Miami
: keep it the same. For many reasons, it is often better to bite the bullet and replace your pump with the same model. Everything will be the same, guaranteed, shaft size, mount, clutch, and importantly, output. In a situation where proper pressure is the key, if the pump was matched to your system, it may make a huge difference if there is even a minor output difference, from blowing the whole system to not making the same amounts of gph. Call the manufacturer, they most likely will be able to id the pump you have and recommend the proper replacement. I have followed that advise and after changing most of the pumps on this boat (including the high pressure water
maker pump, we rebuilt it ourselves), have not had any issues and the installs went smoothly. Since pumps do not require constant maintenace, why go through all of this to make that maybe once a year oil change
a little easier and risk everything else?