Jacuzzi Whirlpool Bath Hot Tubs used a patented designed "cone" pump union and wetend. Although the mtors are a standard 48frame motor, the wetend is patented.
If a tech sees any rust/corrotion on the pump motor, they will recommend replacing with the COMPLETE pump/motor as shown below. Reason is that it cost a lot in labor to save money on replacing one part and having the another part to fail soon afterwards. And the warranty gets a bit sticky with individual parts where the pump/motor complete shown on this page comes with a complete warranty for 180 days. Jacuzzi's standard warranty.
Circulation Pump Complete
1997-2001 230vac
Replacement circulation pump with cord. Ready to plug in on models with crimp style board plug-ins.
6000-125E
$284.00
1 Speed, 230v Jet Pump
1993-2001
Pump/motor used on most 230v models.
May be rated 3/4hp or 1hp. 220-240vac,
Uses the "cone" shape pump union common to spas built by Jacuzzi Whirlpool
2500-250
$399.00
2 Speed, 115v Jet Pump
1993-2001
Standard Duty 2 speed 115v Motor
Used on Jacuzzi Whirlpool Single Pump Spas
110-120vac.
Uses the "cone" shape pump union common to spas built by Jacuzzi Whirlpool
2500-255
$419.00
Since Jacuzzi no longer offers the K pump, we have the solution that will solve your problem.