5239208 Spa Pump 230v 8A 56f 2-Spd 3.7/3.1" threads

5239208-S Spa Pump 230 Volt 8.0 amps 56 Frame 2-Speed, 3.7/3.1" threaded connections, 10-5239208-K.

Note that this rare model had a BIG 3.7" outside diameter thread on the intake, and a normal 3.1" thread on the discharge.

And if not available, you can use 5235208 with a threaded adapter here:

5235208 and Thread Adapter

Can be single capacitor design, or dual capacitor, sometimes ships with big 6 slot base under the motor, and sometimes with 4 slot base, depending on availability.