By Century Motors



Part # 5204X

Manufacturer Code B123

Alternate Part #'s 1096, 1104375401, 113686, 13592, 141930, 142459, 142775, 158127, 158961, 159985, 164124, 164128, 164300, 164430, 164440, 164444, 177471, 190000, 1D173, 1K043, 35-6403, 5KCR49UN2087X, 7-164300-23, 7-164300-24, 716430024, 8-164300-23, A600FH, A600FHL, B706, B795, B796, C1096, CD15FL1, CK115, EB123, MGT605094, P704, S88-174, SK1152, 35-126-1406, CRMB123

Product Description


Note: NOT California Title 20 Compliant. 

Compliant Options: None, replace the whole pump with Compliant Variable Speed


Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

1.5 HP
230/115 V
9.2/18.4 amp
Service Factor:
Total HP:
1.95 HP
Century (A.O. Smith)
3450 RPM
Commonly Used On:
Sta-Rite, Hayward, American Products, Hydra Bath, Pac Fab, Jacuzzi, Doughboy

?     Asked on 1/11/2012by Guest

What is Service Factor?

A  Answered on 1/11/2012 by InyoPools Product Specialist Patrick P.

Service Factor(SF) is a multiplier that when multiplied by the horsepower of the motor indicates the total permissible horsepower loading that may be carried when the motor is operating at rated voltage and frequency. The most important thing to remember when replacing a motor is that the replacement motor's horsepower times its service factor must be equal to or greater than the original motor's horsepower times its service factor. The Service Factor rating can be found on the motor label. See Step 4 of our How to Read a Pool Motor Label guide.

?     Asked on 2/28/2016by Inyo Visitor

how do i get the inpeller off my 1.5 hp pentair pump

A  Answered on 2/28/2016 by InyoPools Product Specialist Patrick P.

We have a great Video on How to Replace a Pool Pump Impeller which goes into full detail on how to remove your impeller.

?     Asked on 6/10/2016by John

Will this motor fit my older Anthony bronze pool pump. If yes, what is your return policy if it doesn't fit in the space available? Thanks

A  Answered on 6/19/2016 by InyoPools Product Specialist Lennox H.

Hi John, If you have the Anthony ASAC Pump then this motor can be used with that pump. However, if you can provide the motor's part, cat or mod # I can confirm which motor you need as a replacement.

?     Asked on 8/14/2016by Craig

Will this work for replacing my MagneTek Centurion motor B750 8-164718-02 1.5 HP FR=N56C ? It is attached to Purex equipment.

A  Answered on 8/20/2016 by InyoPools Product Specialist Lennox H.

Hi Craig, Yes. This motor can be used as a replacement for p/n 8-164718-02.

?     Asked on 4/13/2017by DAVID T ENSIGN

I have a PAC FAB Hydropump with a 1hp Goulds motor part # 8-152540-21. I need an external capacitor but the number in unreadable. do you have one or could you provide me a part #? Also, will the 1.5 Hp (b123) replace my motor.

A  Answered on 4/13/2017 by InyoPools Product Specialist Scott W.

The capacitor for that motor is part number 5270-14, and yes, your B123 will replace your current motor but you would also have to upgrade your impeller as well, part number 5000-3049.


Review Summary

 (Average 4.34  out of 5 stars)
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