Century 1.5 HP Up Rated NorthStar Replacement Motor - USN1152



Part # USN1152

By Century Motors

  5 Average  



Part # USN1152

Warranty 1 Year

Dimensions 14" L x 6.5" W x 6.5" D

Alternate Part #'s 187630, 193221, 193685, 7-193685-02, EUSN1152, SP1610Z1MNS, SP1610Z1MNSC, SPX1610Z1MNS

Product Description

Uprated 1.5 HP motor; 3450 rpm, 208-230/115; 8.5-7.8/15.6 full load amps; 1.25 service factor; 56J frame

Note: NOT California Title 20 Compliant. 

California Title 20 Compliant Options:

Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
1.5 HP USN1152 & SP1610Z1MNSC Replacement Pool Motor
1.5 HP
3450 RPM
208 - 230/115 V
8.5 - 7.8/11 amp
Service Factor:
Total HP:
1.88 HP
Stock #:
USN1152 or SP1610Z1MNSC
Dimension Letter:
13.35 in.
Commonly Used On:
Hayward Northstar Pump

?     Asked on 4/6/2020 by Wes

I have a 1hp B228SE Century motor that I need to replace. Can I upgrade to this 1.5hp motor or should I stick with the 1hp? It appears it would fit my existing Super Pump. Thanks for any help.


A  Answered on 4/6/2020 by InyoPools Product Specialist Patrick P.

Hi Wes, If you wanted to upgrade to 1.5 HP you can do so, you will need this 1.5 HP Super Pump Motor this Hayward Super Pump Seal Kit and this Hayward 1.5 HP Super Pump Impeller

?     Asked on 9/4/2019 by mark s rubin

so i have a northstar SP1605-Z-1-BNSC. i swear on the motor it says its a 1/2 hp but what i see here is a 1.5 hp is that right and will my pump housing fit the new style? also i live in Ca and all i want to do is get this up and running do i need the dual speed? thank you Mark

A  Answered on 9/4/2019 by InyoPools Product Specialist Lennox H.

Hi, Mark. The original SP1605-Z-1-BNSC is a 1/2 HP Full Rated motor which is no longer available. You will have to use the B2973 motor which is compliant with CA Title 20 law.

?     Asked on 1/21/2019 by JOHN N.

could you please provide me the part number for nbsp (bushing) for part number USN1152 (NORTH START PUMP).

A  Answered on 1/22/2019 by InyoPools Product Specialist Lennox H.

Hi, John. I'm not sure what you're referring to as the nbsp bushing. Please provide a picture or an alternate description of the part.

?     Asked on 1/20/2019 by JOHN N.

Is this the right replacement motor for Hayward SP1610-Z-1-MNSC, HP 1.5 VOLTS 208-230/115, SF 1.25, SERIAL CB04-11 Appreciate your help. Thank you!!!!

A  Answered on 1/21/2019 by InyoPools Product Specialist Michelle B.

Hello, Yes, this will be the correct motor you will need.

?     Asked on 11/26/2018 by Steve French

How many watts does the pump use?

A  Answered on 11/27/2018 by InyoPools Product Specialist Lennox H.

Hi, Steve. This motor uses 1,768 - 1794 watts. 

?     Asked on 5/4/2018 by Chris Kinman

this is the correct motor (1.5 horse), what I'm looking for is a replacement wire cover and the wire connection board it protects. both have sun damage and the board is broken away from the clamp screws. If available what is the part numbers? Thanks

A  Answered on 5/5/2018 by InyoPools Product Specialist Lennox H.

Hi, Chris. The Back Cover for this motor is Part #18906802 and the Terminal Board is Part #18907201. We can special order these parts which can take a couple weeks. 

  • Commented on 2/3/2019 by Product Owner

    I have a 1.5hp Hayward pump (7-187630-02) in which I replaced the starter capacitor with a capacitor of the same specs a couple of months ago. Today I turned the pump off to do some cleaning of the equipment and when I turned it back on a loud pop sound occurred at the back of the motor. I thought it might be the new capacitor failing up when I took the motor cover off I noticed a burnt wire and a melted terminal block at one of the terminals. Is it worth while replacing the terminal block?

    • Commented on 2/4/2019 by InyoPools Product Specialist Patrick P.

      Hi Paul, At this point, my suggestion would be to replace the entire motor with the USN1152 motor as I think at this point you will be investing too much into reviving a dying motor. If you do want to the order the terminal board then we could special order this item for you and the part # is 18907201 however my suggestion would be a completely new motor.

?     Asked on 4/30/2018 by Pat Rogers

How long is shipping time.

A  Answered on 5/1/2018 by InyoPools Product Specialist Hector F.

Motor orders are guaranteed by the third business day. 

?     Asked on 9/30/2017 by Paul

I have this pump motor on my hayward northstar pump. The motor is controlled by an Aqualogic system. Do you know if this motor can be converted to dual or multi-speed, and if so would that be a complicated change for my aqua logic? I was also thinking the dual speed controls might be independent of the Aqualogic controls. Thanks for your help.

A  Answered on 10/2/2017 by InyoPools Product Specialist Lennox H.

Hi, Paul. You can convert your single speed pump to a dual speed pump using the SPX1610Z2MNS motor. The SPX1610Z2MNS motor will have to be controlled by the AquaLogic controller. 

?     Asked on 9/1/2017 by Tim

I have a A.O. Smith Part # 7 - 187630 - 02 Serial # CB06-16. It simply stopped running, now will power on but hums loudly. It is a good 10 years old so thinking replacing the pump would be best. What is the direct replacement for it please? Thank you, Tim

A  Answered on 9/5/2017 by InyoPools Product Specialist Lennox H.

Hi, Tim. This USN1152 motor is the direct replacement for Part # 7 - 187630 - 02. 

?     Asked on 8/12/2017 by Larry

We need to replace our pool pump. Here is the info off the motor plate A.O smith Century Centurion 1081 Pool Pump SP161021BNSC Part # 7-193221-02 Do you have a direct replacement?

A  Answered on 8/15/2017 by InyoPools Product Specialist Lennox H.

Hi, Larry. Yes, this Century USN1152 Motor is the direct replacement to Part # 7-193221-02. 

?     Asked on 6/29/2016 by Gaye

What is the difference in a 1 speed vs 2 speed motor? I have a Hayward Northstar

A  Answered on 6/29/2016 by InyoPools Product Specialist Alan M.

A single speed motor runs a constant speed all the time. A dual speed or two speed motor has a high and low speed. The option allows you enjoy energy savings when running the motor on the lower speed setting.

?     Asked on 3/1/2016 by Rudi

I need a new motor, and motor id number almost fits. Hope you can help. tag on my burnt up motor reads: A.O.Smith SP1610-Z-1-MXBK Thank you

A  Answered on 3/3/2016 by InyoPools Product Specialist Megan C.

Hello, Rudi. The part# A.O.Smith SP1610-Z-1-MXBK references to the USN1152 A.O. Smith 1 1/2 HP Up Rated Northstar Replacement Motor. The Shaft-Seal will need to be replaced too. Keep in mind Hayward manufactured two North-Star pumps. You will need to verify the which model you have to correctly identify the Shaft-Seal needed. The easiest way to identify your pump model is by examining the Strainer Cover (Pump Lid) for a molded part number. Hold the Strainer Cover up towards sunlight or artificial light to view the part number. Click here to view Hayward Northstar 1998 to 2007. Click here to view Hayward Northstar Pump, 2008 to Current.

?     Asked on 11/2/2015 by Marty Moran

My terminal end bell for the USN1152 is worn out. Is there a replacement end bell available for this motor? Thanks!

A  Answered on 11/3/2015 by InyoPools Product Specialist Joe S.

Hello Marty the part need will be AOS18906802

?     Asked on 3/8/2015 by Chris

I have a Century Centurion produced usn1152 pool pump motor, but I need to replace the bearings. For some reason I can't find the bearing sizes. Any help?

A  Answered on 3/9/2015 by InyoPools Product Specialist Robert M.

Hello Chris - The USN1152 requires one 203 bearing and one 304 bearing.

?     Asked on 1/19/2012 by Guest

I'm trying to replace the motor on my pool pump but all these numbers and abbreviations on the motor label are really confusing me. What do they mean?

A  Answered on 1/19/2012 by InyoPools Product Specialist Patrick P.

Replacing a pool pump motor is not as difficult as it seems. You can try looking here. If you need help figuring out what the information on your label means. If you are still having difficulty figuring it out you can call us at our toll free number or you can send us a photo of your motor label here.

?     Asked on 1/18/2012 by Guest

I'm trying to find a replacement motor for my pool pump but my model number doesn't match what you have listed as the model number. My model number begins with a C48 and yours begins with an SP. Please help.

A  Answered on 1/18/2012 by InyoPools Product Specialist Patrick P.

What we have listed on our chart pages is the pump model number. The model number you have will just identify the motor. If you look on the plastic housing on the pump there should be a sticker which will have the pump model number. You can usually find this by the discharge port on the pump. Once you locate it you can choose the correct replacement motor. Be certain to change the shaft seal and gaskets as needed. You can use our >How to guide if you need help. 

?     Asked on 1/12/2012 by Guest

Why should I purchase a Tune Up Kit?

A  Answered on 1/12/2012 by InyoPools Product Specialist Patrick P.

A Tune Up Kit includes all of the essential replacement seals and gaskets for the pump. The seals and gaskets should be replaced when installing a new motor on your pump. New seals will prevent the pump from leaking water or losing the prime. A Tune Up Kit will protect your motor and ensure that the pump is working efficiently.

?     Asked on 1/12/2012 by Guest

Why do I need to purchase a new shaft seal?

A  Answered on 1/12/2012 by InyoPools Product Specialist Patrick P.

We strongly recommend replacing the shaft seal. The purpose of a shaft seal is to prevent water from running down the shaft of the motor and into the motor housing. Water will damage the bearings and cause the motor to fail. A new shaft seal should be installed whenever a motor is replaced. The motor manufacturer can deny the warranty if the motor fails to due to water damage from a faulty shaft seal. To find your shaft seal you will need to visit our Pool Pump Parts Page or the Spa Pump Parts Page and select your make and model.

?     Asked on 1/11/2012 by 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.


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Nut Drivers, Pliers, Socket Set, Wrench Set, Adjustable Wrench

Seized drive shaft

Written on 9/30/2020 by Guest

I hate this pump with a passion but it is a great customer of mine that I did not want to make spend money on an entirely new different pump set up.
Drain water
Remove twist locK
Remove 4 exterior Motor to pump bolts
Remove next 4 bolts on bezel
Loosen rear metal cover screws
Remove impeller by securing the driveshaft nut and turning the impeller
Remove next two covers attached to motor
Turn off breakers
Remove electrical
Replace gaskets, seals and impeller spring
Reassemble in reverse with new motor

Were these instructions helpful? 


Est. Repair Time

1 to 2 hrs

Tools Needed

Screwdriver, Socket Set, Wrench Set

1     0

Old pump locked up

Written on 7/4/2019 by Guest

1 removed locking screw and took off the pump holder.

2 removed electrical

3 pulled old pump out. Took a little finessin

4 Had to unbolt pump from frame. Had to use a wrench on both ends to pull it. Put gasket back on with seal

5 then put new pump back it. This was a little hard to get in, nut once I started the Claire it came together fine.

6 hooked up electrical

7 flipped breaker and primed pump. Started up beautifully. Works great.

Were these instructions helpful? 


Est. Repair Time

Less than 1 hr

Tools Needed

Screwdriver, Nut Drivers, Socket Set

Pool Pump Stopped Working so I Replaced the Motor

Written on 11/12/2018 by Guest

Once I realized what the problem was, I removed the motor then replaced it along with the seals and bearings. A piece of cake!

Were these instructions helpful? 


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