My jacuzzi pool pump cracked so I need to replace it. Jacuzzi is no longer making parts, so what would be a good brand where I could still use the same pipes, filter, etc.?

you might not be able to replace the switch parts might not be available jacuzzi is out of business you might be able to replace the motor if not get a new pump they can cross reference for you

This sounds like it could be the shaft seals, which is a cheap fix.
The Jacuzzi Magnum calls for seal 35-423-1021
You might consider replacing the seal plate O-Ring as well. - 35-105-1120

the pump is pumping and circulating hot water into jacuzzi, it will get hot. I think it is ok

There is no way you have water flowing to the inlets of the pool and not have the pump working.
What do you mean by the word "Jacuzzi" in your statement?
Is this a set up where you have a diverter that the water is used in both the pool and the hot tub?

Rod
US Parts Center

Jacuzzi (Carvin) Magnum, Force & Plus pump parts are hard to find.
Here is a link to our site which has a parts explosion/diagram for those pumps.
Jacuzzi Magnum, Magnum Plus, and Magnum Force Pumps

TIME TO BUY A NEW COMPLETE PUMP !! I RECOMMEND A STA-RITE DURA GLASS PARTS FOR THE JACUZZI ARE HARD TO FIND AND $$$ SCRAP IT REMEMBER TO PRIME YOUR NEW PUMP ... THUMBS UP IF I WAS OF HELP.. THANKS JAY.. THE POOL PUMP REPAIR GUY

clean thoroughly and lightly sand to roughen surface and use two part epoxy with fiberglass mess, can find both at auto parts store

Ideally you will need to replace the wet end (not the whole pump) but there are products like LS-X made by fernox that will seal such a leak.

I would probably say that the pump is clogged up or frozen. The motor humms until the heat sensor clicks it off. Try taking apart the front of pump and see if it turns and you should see the problem. Parts are available at most pool stores. Pumps are usually cheaper online.

Good luck...Jacuzzi went out of business. The best source I have had for their parts is CCO:

http://www.jbparts.com/jbc0001.html