Century 1.5 HP Round Flange 56J Dual Speed Full Rate Motor - STS1152R



Part # STS1152

By Century Motors

  4.77 Average  



Part # STS1152

Warranty 1 Year

Manufacturer Code STS1152R

Dimensions 15" L x 5.5" W x 8" D

Alternate Part #'s 177106, 7-177106-01, SP1615-Z-2-BC, SP1615Z2BC, STS1152R

Product Description

Voltage 230, High Speed HP = 1.5 Low Speed HP = 1/4, Max Amps @ High HP = 9.0 Max Amps @ Low HP = 3.3, Dual Speed, Round Flange, RPM @ High Speed = 3450 RPM @ Low Speed = 1625, Threaded Shaft, Frame = 56J Used on the following DUAL SPEED pump models: Hayward Max Flow, Hayward Super Pump, Hayward Super II, Hayward Northstar and Jacuzzi Magnum pumps.


Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
1.5 HP STS1152 &STS1152R Replacement Pool Motor
1.5/ .25 HP
3450/1725 RPM
230 V
9.0/3.3 amp
Service Factor:
Total HP:
1.95 HP
Stock #:
STS1152 or STS1152R
Overload Protector:
Dimension Letter:
13 - 1/16 in.
Commonly Used On:
Hayward Max Flow, Hayward Super Pump, Hayward Super II, Hayward Northstar and Jacuzzi Magnum
California Title 20 Compliant

?     Asked on 8/19/2019 by Joe

I bought this motor a couple of years ago. It has been running great until a few weeks ago. when I run it in low it runs fine. when I run it on high it runs for a while and shuts off. it is not tripping any breakers but it is very hot. when it cools down it comes back on. any ideas on where to start? my old motor lasted over 10 years. thanks for your help. Joe

A  Answered on 9/20/2019 by Industry Professional

Most likely Loose connections in the wires somewhere between the breaker and the motor connections. Voltage is dropping and the motor is not able to operate at full power.

?     Asked on 8/6/2019 by Frank

I am sorry that I keep beating this same dead horse. You stated that end cap cover #1011431-001 is the correct switch for the A.O. Smith #STS1152R dual speed pump. I call tech support to cofirm before I place my order and they stated that the two speed toggle switch #18313301 is the correct switch.PLEASE which one is correct so I can place my order, Thanks

A  Answered on 8/6/2019 by InyoPools Product Specialist Lennox H.

Hi, Frank. The End Cover Switch Assembly - 1011431-001 is the ONLY option for this STS1152 motor.

?     Asked on 8/6/2019 by Frank

Will This Two-Speed Toggle Switch Assy. - Lo/Off/Hi - 18313301 fit on this two speed pump?

A  Answered on 8/6/2019 by InyoPools Product Specialist Lennox H.

Hi, Frank. Unfortunately, it will NOT. You will need to use the End Cover Switch Assembly - 1011431-001 with this STS1152 motor. 

?     Asked on 8/5/2019 by Frank

Hi. I have a Hayward replacement Mod# ST1152 replacement Mod#K48M2N110C1 1.5 HP Volt 115/230 RPM Frame 56J is this the right replacement.

A  Answered on 8/5/2019 by InyoPools Product Specialist Lennox H.

Hi, Frank. The ST1152 motor is the correct replacement. This STS1152 is a dual speed replacement option. 

?     Asked on 7/30/2019 by

i have a ge pump mod# 5KCR39UN2819X 1.5 HP V 115/230 RPM 3450 FR 56J is this pump compatabel and fit onto my Hayward filter.

A  Answered on 7/30/2019 by InyoPools Product Specialist Lennox H.

Hi. This STS1152R is the correct replacement.  

?     Asked on 5/19/2019 by phil

is this a pump for a swimming pool

A  Answered on 5/20/2019 by InyoPools Product Specialist Michelle B.

Hello, Yes, this will be a motor to a pool pump.

?     Asked on 5/8/2019 by

I want to replace the motor on a Hayward super pump Century C48K2N143B1

A  Answered on 5/8/2019 by InyoPools Product Specialist Joe S.

Good afternoon, if you have C48K2N143B1 you would need A.O. Smith 3/4 HP Round Flange 56J Dual Speed Full Rate Motor - STS1072RV1.

?     Asked on 4/9/2019 by John Luther

Hi, I have a Haywood SP2610X152S pump with an AO Smith SP1610Z2MSC motor part# 7-177653-03. The bearings are noisy and I would like to replace them. Do you have replacement bearings for this motor? Thanks


A  Answered on 4/10/2019 by InyoPools Product Specialist Lennox H.

Hi, John. Based on the info we have, your motor will use (1) 6304 and (1) 6203.

?     Asked on 2/19/2019 by Garry Krueger

I need to replace Hayward Northstar Pump motor SP1615-Z-2-BC. Also looking for the correct shaft seal. Unit installed 11/07


A  Answered on 2/19/2019 by InyoPools Product Specialist Michelle B.

Hello,Can you please send a side view picture of the entire pump?

?     Asked on 2/12/2019 by Robert Pasma

I am so Cal, where would this ship from.

A  Answered on 2/12/2019 by InyoPools Product Specialist Michelle B.

Hello, This will ship from Tx. It will take 1-3 business days to get to you.

?     Asked on 1/26/2019 by Jimbo

A 21 month old SP2610X15 that obviously from the get-go, had a poorly installed seal. To my disbelief, the inside of the motor was so corroded from 20 months of water leakage, the metal simply fell apart! Obviously, a seal issue. Not reparable. I'm looking at a B2979 or STS1152R. Can I wire either [low speed only] w/o having to purchase a switch? Any other advise would be greatly appreciated. Dual speed for energy savings. Pool is under 9,000 gallons. Can I use a 1hp w/my current pump housing?

A  Answered on 1/29/2019 by InyoPools Product Specialist Lennox H.

Hi, Jimbo. Based on your pump model, you will use the STS1102R Dual Speed motor. The motor can be wired for either High or Low Speed only if you do not want to use a toggle switch or external controller.

?     Asked on 12/15/2018 by

I need to replace an AO Smith Cantury Two Speed 1081 pool and Spa duty...motor SP1610Z2MC. 1.5 HP-.25 Frame X56J. The bearings are screaming and I think replacing the motor would be easier. What model would work to replace it?


A  Answered on 12/17/2018 by InyoPools Product Specialist Lennox H.

Hi. The replacement motor will be the STS1102RV1 or B975 motor. I will recommend that you get the Super II Pump Tune Up Kit - GOKIT2 or GOKIT2SALT.

?     Asked on 8/1/2018 by Rob

Can you help explain the difference between this motor and the Part #: 5388X? These come up as replacements for Hayward/Century SP1615Z2MC/Part 7-177107-04, but my current motor lists HP as 2.0/.33. Just checking I'm looking at the correct replacements. Any other info for questions I'm not asking would be much appreciated. Thank you!

A  Answered on 8/1/2018 by InyoPools Product Specialist Lennox H.

Hi, Rob. The difference between these two motor is the physical size which will include the design. Also, the amp ratings, PART # 5388X is slightly more energy efficient. However, both motor has a Total HP (THP) of 1.95. 

?     Asked on 5/14/2018 by Jat

I have an older superpump. Cannot read the model or serial number, as they are faded on flimsy tinfoil looking labels. The old motor is an A.O. Smith 1.5hp, 1.0sf, single speed, 230v motor, 56J frame. Model # C48L2N134B1, I would like to replace the motor with 2 speed. Is there any reason to spend the few dollars and do the easy, but likely tricky to fit plumbing and change the pump?

A  Answered on 5/15/2018 by InyoPools Product Specialist Alex V.

Jat, If the pump housing is still in good shape, you can simply replace the motor and seals. Please note that the 2-speed motor will only run on 230v. You will also need to purchase a 2 speed switch or 2-speed timer to control the high and low speed. 

?     Asked on 5/7/2018 by Jason

I have an AO Smith Pool Filter Motor (STS1152R). The housing is hot to the touch, even at the low speed. Is this normal? I installed it in December, along with the seals and gaskets.

A  Answered on 5/7/2018 by InyoPools Product Specialist Hector F.

These motors are designed to run around 130-140 degrees. If the motor does not shut down then I would not be concerned. 

?     Asked on 2/27/2018 by Don

I have a Hayward pump sp3015eeaz. Afew years ago I had to replace the motor and a 1.5 hp a.o. smith centurion motor CAT B129 was installed. That was not the original motor. I am going to need to replace that motor. What do you suggest?

A  Answered on 2/28/2018 by InyoPools Product Specialist Lennox H.

Hi, Don. You can use the Century B129 or the ST1102 motor with the SP3015EEAZ. If you would like to convert your pump to dual speed, you can use this STS1152 motor. Whichever motor you choose I will recommend that you get the Super II Pump Tune Up Kit - GOKIT2 or GOKIT2SALT.

?     Asked on 9/27/2017 by Henry

i have a Hayward super pump AO smith century dual speed 1.5 hp sp1610z2msc pool pump I need a replacement. What should I get?

A  Answered on 9/27/2017 by InyoPools Product Specialist Lennox H.

Hi, Henry. You can use either the B2975 or STS1102R as a replacement. I would also recommend getting the Super Pump Tune Up Kit - GOKIT3 or GOKIT3SALT.

?     Asked on 7/25/2017 by Jonathan

I have an RS1502 Hayward pump with a 2 speed 1 1/2 HP A.O. Smith SP1610Z2MC. Would this motor (STS1152R) be an exact replacement.

A  Answered on 7/25/2017 by InyoPools Product Specialist Lennox H.

Hi, Jonathan. This Century STS1152R motor is the correct replacement for SP1610Z2MC. I would also recommend getting GOKIT2 which includes the pump seal and gaskets. 

?     Asked on 7/18/2017 by Don

What is the most energy efficient motor and can I change just the motor that is connected to the pump or do you have to change it all. Old motoer number is K48M2N123

A  Answered on 7/18/2017 by InyoPools Product Specialist Lennox H.

Hi, Don. You can change just the motor with either the STS1152R or ECM27CU motor. 

?     Asked on 7/10/2017 by

I have a Hayward Super Pump with a Hayward Century single-speed motor (model C48L2N134B1). Twice overnight the motor has completely stopped (wall power switch still in the on position), so I'm assuming it's overheating. (It will start working again after 5 hours or so.) I'd like to replace it with a dual-speed motor. Is model STS1152R a good match? What else do I need to change to two speeds? I don't currently have a timer, but I'm happy to control a dual-speed manually.

A  Answered on 7/10/2017 by InyoPools Product Specialist Patrick P.

My suggestion would be the B2975T Dual Speed Replacement Motor with Timer I love this motor as it has a digital timer built right into the top of the motor which makes installation very simple. The B2975T is a 1 HP Full Rate motor which is identical to your 1.5 HP up rate motor. I would also suggest a Hayward Super Pump Seal Kit when you do your replacement.

?     Asked on 6/6/2017 by Mark

I have a 1hp variable speed hayward pool pump that has gone bad and would like to upgrade with a 1 1/2hp variable speed. Would this motor fit? Also, I have a controller that switches speeds, so there is no need for manual switch, correct? Thank you

A  Answered on 6/18/2017 by InyoPools Product Specialist Patrick P.

Hi Mark, if you have the Hayward Super Pump or Super II pump then you would need the variable speed replacement motor listed here - 1.65 HP Round Flange Variable Speed Pool Motor. For this motor you will need a timer to power the motor on and off and then all the timer functions and RPM control is done directly on the controller on the motor.

?     Asked on 5/3/2017 by

I have a 3 year old AO Smith SP1615Z2MC motor that completely rusted out the top cover. I see there are protective pump covers - is this the solution to the problem or is it just a Band-Aid fix to have a protective pump cover? My original pump motor lasted 15 years but it didn't have a top cover. Is this just a poor design and I should look for a different motor design?

A  Answered on 5/4/2017 by InyoPools Product Specialist Lennox H.

Hi. The Protective Motor Cover will prevent rusting that is caused by water pouring down on the motor. There is nothing wrong with the design of the motor.

?     Asked on 3/18/2017 by Tim meyerhoff

I need a replacement for a C48L2N36 Hayward / AO Smith superpump It is two speed 1.5 and .25 hp 220 volt Also is there an alternate which is 2 HP which will fit? It is for an swim spa I might consider upping it a half horsepower. So what models have the same flange ? Thanks ! Tim

A  Answered on 3/21/2017 by InyoPools Product Specialist Lennox H.

Hi, Tim. The STS1102R is the correct replacement for your current motor. The STS1152R would be the step up from the motor to the 2 HP since these motors are considered Full Rate. Due to a higher service factor, full rate motors have a higher total hp that what they're rated for. If you do go with the STS1152R motor you will need to change the impeller with p/n SPX2615C or the STS1202VR1 motor will require p/n SPX1621C (impeller) and SPX1616B (Diffuser) along with the Hayward Super Pump Tune Up Kit - GOKIT3 or GOKIT3SALT.

?     Asked on 3/4/2017 by PAT


A  Answered on 3/6/2017 by InyoPools Product Specialist Lennox H.

Hi, Pat.The UST1152 single speed motor is the direct replacement for model # C48L2N134B1. If you would like to convert to a dual speed motor here are your options; the STS1102 in addition to the End Cover Switch Assembly (1011431-001) or the T106R Timer or the B975T motors.

?     Asked on 1/21/2017 by Ron

replace motor and reconnect to primer chasis.......is there a manual or procedure to assist with replacement

A  Answered on 1/24/2017 by InyoPools Product Specialist Alan M.

Here is a link to our Do-It-Yourself video on How To Replace the Motor on Your Pool Pump. Please let us know if you need additional assistance.

?     Asked on 12/26/2016 by BR

My impeller broke (original pump install in 2005,) this will be my second motor replacement for this Hayward dual speed Super II pump. Which impeller do I use with the STS1152R? The original 3010c states it for a 1 1/2 hp up rated or 1 hp full rated motor and this new motor is full rated at 1 1/2 hp. From looking on your site, the 3015c looks to be rated for a 1 1/2 hp pump. Thanks.

A  Answered on 12/27/2016 by InyoPools Product Specialist Adam Y.

I would need your pump model to confirm but I am showing Impeller, Sp3015-c, Hayward (spx3015c) as the correct part. If your pump is a sp3016 than you would need Hayward (spx3016c)

?     Asked on 11/2/2016 by Steven

Is this pump compatible to replace my hayward sp1610z2m? I have seen the same part number in cross reference to this pump, but just want to make sure it will be a direct swap. Thank you for the help.

A  Answered on 11/2/2016 by InyoPools Product Specialist Adam Y.

Good Morning Steven, This pump Motor, 56j 1 1/2 Hp 2 Spd 230v (sts1152r) is compatible. I would just match up the specs to be 100% sure this is the right pump for you . Product SpecificationsMotor Name:1.5 HP STS1152R &STS1152R Replacement Pool MotorHP:1.5/ .25 HPSpeed:DualRPM:3450/1725 RPMVolts:230 VAmps:9.0/3.3 ampService Factor:1.3Total HP:1.95 HPFrame:56JStock #:STS1152RShaft:ThreadedOverload Protector:AutoDimension Letter:AGDimensions:13 - 1/16 in.Commonly Used On:Hayward Max Flow, Hayward Super Pump, Hayward Super II, Hayward Northstar and Jacuzzi MagnumQ&A

?     Asked on 1/14/2016 by Neil Temple

I want to replace the motor on my North Star pump. The motor is SP1615Z2BC, Part 7-177106-01. Is this the exact replacement motor?

A  Answered on 1/15/2016 by InyoPools Product Specialist Lennox H.

Hi Neil, The A.O. Smith 1-1/2 HP Round Flange Dual Speed Full Rate Motor (STS1152R) is an exact replacement to p/n 7-177106-01.

?     Asked on 9/1/2015 by Jose

What specific capacitor on this unit? The fact that the high speed does not work but the low speed does work on this dual speed could be the capacitor atop the motor? Please shed some light

A  Answered on 9/7/2015 by InyoPools Product Specialist Lennox H.

Hi Jose, We do not have the specs of the capacitors for the STS1152 Dual Speed motor. You will have to get the specs off of the run capacitor to find the correct replacement.

?     Asked on 7/13/2015 by Doug V

I have an SP3015EEAZ pump (single speed motor ST1152) that has a bad motor. I want to replace the motor with a dual speed motor like the STS1152. Will the new motor fit?

A  Answered on 7/15/2015 by InyoPools Product Specialist Lennox H.

Hi Doug, The A.O. Smith 1-1/2 HP Round Flange Dual Speed Full Rate Motor (STS1152R) will be the correct Dual Speed for the Hayward SP3015EEAZ pump. I would recommend getting a Hayward Super II Pump Tune Up Kit (GOKIT2) and a Intermatic Dual Speed Pump Timer (T106R) if you do not have a controller.

?     Asked on 6/18/2015 by Dave

Hi, I am trying to replace a Hayward motor w/ the following specifications: A.O. Smith Century Two Speed 1081 Pool & Spa P/N 7-177106-01 HP 1.5 - 2.5 Code G SP1615Z2BC SF1.3 RPM 3450/1725 AMPS 9.1/3.4 It is controlled with an Blue Haven (Goldline Aqua Logic) controller. Can you help me out with everything I need, i.e correct motor, timer??, replacement seals, gaskets, etc? Thank you, Dave S.

A  Answered on 6/18/2015 by InyoPools Product Specialist Patrick P.

Hi Dave, The motor on this page would be the correct replacement motor based on the information you supplied. The controller you already have would be fine to control this motor unless the controller has gone bad. As far as the tune up kit goes could you reply back to the email which was sent to you with a couple photos of your pump, this would allow us to recommend the proper tune up kit.

?     Asked on 5/27/2015 by Del

According to the product description of this 1.5 HP super pump, 2 speed replacement motor, it is shipped LESS HI/LOW SWITCH. This means there is no Hi/LO switch? So, how can I manually switch it to Hi or Lo, Joe S? Will this motor fit in my old 1.5 HP Hayward super pump housing? Thanks.

A  Answered on 5/28/2015 by InyoPools Product Specialist Patrick P.

Hi Del, You are correct this motor does not have a Hi/Lo switch and is only controlled through an outside timer purchased separately. If you want a manual toggle switch for the Hi/Lo then you would need the complete hayward super pump 1.5 HP SP2610X152S which includes the "Hi/Lo" switch on the back of the motor for manual switching of speeds. If you just want to replace the motor then we highly recommend the dual speed motor with integrated digital timer as the installation and wiring is so much easier than the manual switch. The digital timer allows you to manually switch between speeds or you can program the timer to run a different speeds throughout the day. Also the digital timer dual speed motor is less expensive than going with the dual speed motor and then purchasing a separate timer.

?     Asked on 5/27/2015 by Del

I would like to replace my Hayward super pump 1.5 HP single speed with a 2 speed Hayward super pump, same HP. You mentioned, we can purchase a toggle switch or a timer. How do you make the electrical connections? I currently have a combination 220 and 110 v outlets by my pump. I just plug my 3 prong cord from the super pump to my outlet, which is connected to my regular timer which is located in my garage approx. 100 ft. away from the pump, filter & gas heater.

A  Answered on 5/27/2015 by InyoPools Product Specialist Joe S.

Hi Del, the hayward super pump 1.5 SP2610X152S includes "Hi/Lo" switch on the back of the motor so you would still need to do it manual unless you upgrade to a newer timer or automantion system

?     Asked on 4/22/2015 by

What is the warranty on 1.5 hp dual speed?

A  Answered on 4/23/2015 by InyoPools Product Specialist Robert M.

The warranty for the STS1152 is one year.


Review Summary

 (Average 4.77  out of 5 stars)
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