Century 2.0 HP Round Flange 56J Full Rate Motor - ST1202



Part # ST1202

By Century Motors

  5 Average  



Part # ST1202

Warranty 1 Year

Dimensions 16" L x 8" W x 6" D

Alternate Part #'s 110285, 12039, 13300, 13800, 14051, 15027, 15226, 164567, 165114, 177027, 177033, 184951, 1K049, 52012, 5KCR49UN2090X, 6K337, 6K899, 84285, 90118597, 91717, 91729, B109, B130, B711, B773, B809, B836, B993, C1102, C48M2DB11C10, C494, C56M2N111, C56M2N11A1, C56N2N104, C56N2N104A1, C56N2N105, C56N2N106, C56N2N107A1, C56N2T61, C56N2T61A1, C56N2T61A2, C56N2U11A1, C56N2U11A7, CT120C, CT220CE, EB130, EB809, EST1202, JH20FL1, JH20FL1E, K48M2N113, K48M2N113A1, K48N2N104, K48N2N104A1, K48N2N106C1, K48N2N107A1, K48N2N107A2, K48N2N113A1, K48N2N113A3, K48N2N113A4, K56N2N100A1, M547, MTGC-1102, S88-177, SP1615Z1MBK, SP1615Z1MEE, SP1620Z1B, SP1620Z1BEE, SP1620Z1MEE, SP1620Z1MH, SPX1615Z1M, SPX1620Z1BEE, ST1202, SW2564, T1202, T55CXCJM-1347, V13330, 130542, 35-126-3028, AOS-60-5066, AOSST1202

Product Description

Voltage 230, Max Amps = 11.2, Single Speed, Round Flange, RPM = 3450, Threaded Shaft, Frame = 56J Used on the following FULL RATE ENERGY EFFICIENT models: Hayward Super II Energy Efficient, Hayward Northstar Full Rate and Jacuzzi Magnum Full Rate pumps.

Note: NOT California Title 20 Compliant. 

California Title 20 Compliant Options:

Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
2 HP ST1202 Replacement Pool Motor
2 HP
3450 RPM
208 - 230 V
12.6 - 11.4 amp
Service Factor:
Total HP:
2.6 HP
Stock #:
Overload Protector:
Dimension Letter:
13 - 1/15 in.
Commonly Used On:
Hayward Super II , Hayward Northstar Full Rate and Jacuzzi Magnum
NOT California Title 20 Compliant

?     Asked on 12/5/2020 by Charlie

Replacing Design 1081 ST1202 MOD K48N2N106C1 Round Flange Picture below. Just want to be sure this product is the correct replacement motor. Is this the right one?


A  Answered on 12/10/2020 by InyoPools Product Specialist Hector F.

Hi Charlie, yes this is the correct replacement motor for your motor ST1202. When replacing a pool motor we do suggest a Seal Kit. Could you send us a few photos of your pump so we can suggest the proper seal kit? If so then please take a wide shot of the complete pump to include the pipes going in and out of the pump. To supply photos simply click the reply link below and upload your photos. Once we get those photos we can make the proper recommendation for your seal kit.

?     Asked on 10/29/2020 by Capacitor

Can you tell me what would be the correct part number for the capacitor? Model ST1202


A  Answered on 10/29/2020 by InyoPools Product Specialist Joe S.

Good day, for the ST1202 you would need to order the Start Capacitor 161-193 MFD - BC-161.

?     Asked on 3/23/2020 by Mike King

I have a Hayward Super II pump with a AO Smith C48M2N111A3 if this is the correct motor what other seals and gasket kits might I need? Also want to make sure this is the correct replacement motor

A  Answered on 3/23/2020 by InyoPools Product Specialist Patrick P.

Hi Mike, This is NOT the correct replacement motor for the motor you referenced. You will require this UST1202 2 HP Replacement Motor and you will also need this Hayward Super II Tune Up Kit both items are in stock ready to ship! We put together this Video on How to Replace a Pool Pump Motor which you may find helpful when you tackle this project.

?     Asked on 10/30/2019 by

with regards to A.O. Smith 2 HP Round Flange 56J Full Rate Motor - ST1202. Does this come with all the seals and gaskets needed to install?

A  Answered on 10/31/2019 by InyoPools Product Specialist Lennox H.

Hi. Seals and gaskets are not included with motors. The seals and gaskets are specific to the pump housing. 

?     Asked on 8/25/2019 by John

I've the century st1202 model number K48N2N106C1 an want to buy the right gasket, diffuser, Impeller & Pump Shaft seal, seal plate what are the right part numbers. thanks

A  Answered on 8/25/2019 by InyoPools Product Specialist Lennox H.

Thank you for the information on your motor. To better assist you, we will also need the make and model of your pump. This information is typically listed on a label on the housing area, opposite the motor. Once we have this information, we can better answer your questions/concerns. You can also use our How To IdentifyYour Pump Blog for helpful tips. 

?     Asked on 8/8/2019 by

What would be the go kit for this pump?

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

Do you need help finding the shaft seal to complete the motor replacement? If so, we will need the model number of the pump housing or a picture of the housing.

?     Asked on 7/1/2019 by

what seal would you use for a ST1202?

A  Answered on 7/1/2019 by InyoPools Product Specialist Megan C.

We are unable to identify the Pool Pump Shaft Seals without the pump model number. Please review the pump model number off of the wet-end, not the motor.  This link is very helpful in distinguishing the pump vs. the motor https://www.inyopools.com/Blog/pool-parts-101-the-difference-between-a-pump-and-a-motor/

?     Asked on 4/30/2019 by poolshark

can i buy this? i live in califonia.

A  Answered on 4/30/2019 by InyoPools Product Specialist Patrick P.

Unfortunately, this motor cannot be shipped to California. You could go with this 2.7 HP Variable Speed Replacement Motor or you might want to consider one of these PureLine Variable Speed Pumps all can be shipped to California.

?     Asked on 3/25/2019 by Teresa

I am looking for a replacement motor for my old Hayward SP2610X15. Is this the model I would need? Thank you in advance

A  Answered on 3/25/2019 by InyoPools Product Specialist Lennox H.

Hi, Teresa. The UST1152 or PL1152 are the replacement motor options for your model pump/ You will also need the Hayward Super Pump Tune Up Kit - GOKIT3 or GOKIT3SALT.

?     Asked on 3/7/2019 by Brian

I have a A.O. Smith model #K48N2N104, looking to get a direct replacement. An suggestions would be greatly appreciated. Picture attached.


A  Answered on 3/7/2019 by InyoPools Product Specialist Hector F.

This model ST1202 is the direct replacement for your motor model. 

?     Asked on 1/14/2019 by km

Would like to replace an existing AO Smith ST1202 motor with the same new one. Are there any additional parts needed to purchase with this motor, or does it have everything I need to install the new one?

A  Answered on 1/14/2019 by InyoPools Product Specialist Kevin G.

Hello, the only other thing that is needed is a new shaft seal. If you could advise me of the model of your plastic pump housing, I can tell you which one you will need.

?     Asked on 11/12/2018 by Rock

I have the Jacuzzi Magnum Force 2MF-S2 Pump - EST1202. Is this the replacement motor for that pump? The only reason I ask is because the Starter Capacitor is in the back cover - my existing (original) does not have the hump on the top of the motor. Also - I believe the EST1202 is 230V - Can I just hook this one up right out of the box, or do I have to re-wire? Thanks

A  Answered on 11/13/2018 by InyoPools Product Specialist Lennox H.

Hi, Rock. Yes, this ST1202 motor is the correct replacement motor for your model pump. The wiring will be the same. You will also need to get the Magnum Tune Up Kit - GOKIT14

?     Asked on 10/16/2018 by

will the ST1202 replace K48N2N104? thanks for your time

A  Answered on 10/17/2018 by InyoPools Product Specialist Hector F.

Yes, that is the correct motor replacement for your model motor. 

?     Asked on 7/16/2018 by Maria

we have a Hayward superpump pool, hot tub and spa model #: K48M2N111 and we are looking for a motor that fits....any recommendations (energy efficient one would be great?)

A  Answered on 7/17/2018 by InyoPools Product Specialist Hector F.

The direct single motor replacement is the model UST1202 and the energy efficient model that we would recommend is the variable speed model ECM27CU

?     Asked on 1/23/2018 by Leah

Will this motor replace my K48A34A06?

A  Answered on 1/23/2018 by InyoPools Product Specialist Lennox H.

Hi, Leah. This ST1202 will not replace the K48A34A06 motor. 

?     Asked on 11/14/2017 by Chris

I have an AO Smith 2hp model K48N2N104 used with a Hayward housing. It's rated at 230V with a max load of 11.2 V. Is this the best model for replacement?

A  Answered on 11/14/2017 by InyoPools Product Specialist Hector F.

This is the direct replacement motor. Some people prefer a dual speed or variable speed but "best" is merely a preference. You can use the dual speed motor model STS1202 and would need a timer being part number T106R or you can use variable speed model ECM16CU. The more you use lower rpm settings then the more energy efficient they become. 

?     Asked on 8/1/2017 by Marty Hopper

I currently have a Century ST 1202 Model Num. K48N2N106C1 motor that runs an irrigation pump. I had one that lasted 10 years then the next one lasted 2 years. the one I have now burned the winding's in 3 weeks. Is there a more heavy duty motor I can upgrade to?

A  Answered on 8/2/2017 by InyoPools Product Specialist Alex V.

Marty, Based on the specs of the ST1202, the comparable motors will not be as "heavy duty" as what you have now. I would recommend staying with the ST1202. 

?     Asked on 7/16/2017 by Hoss

I have a K48N2N104. I am looking at your site: http://www.inyopools.com/Products/00200017001213.htm?Keywords=k48n2n104 I would like to buy a motor with a bit more power 2.5hp. Do you recommend this? Which model would recommend?

A  Answered on 7/16/2017 by InyoPools Product Specialist Lennox H.

Hi, Hoss. The K48N2N104 motor has a total hp of 2.6 hp so if you're looking to step up the motor you'll need the ST1302 motor.

?     Asked on 5/13/2017 by Doug

Hi, I have a Century Centurion 2 hp, 230v motor, The pump is an American Products Co. Model #38298. The motor still runs good but the impeller that is bolted to the motor is making a very loud noise. I would like to get a new motor and impeller/pump. What can I replace that with? Thanks, Doug

A  Answered on 5/15/2017 by InyoPools Product Specialist Lennox H.

Hi, Doug. They are different 2 HP motors available and I was not able to locate an American Products pump using that model number. Please send us pictures of the motor label and of the pump housing so that we can try to identify the replacement motor and pump.

?     Asked on 3/27/2017 by Jennifer Swahl

I have a motor that went out and I'm trying to find the correct replacement. Your help would be appreciated. My pool has a Jandy pump model# JHP2.0, Serial # 0834. Can you point me to the correct motor? Your assistance is greatly appreciated.

A  Answered on 3/28/2017 by InyoPools Product Specialist Andy O.

Hello Jennifer- The correct replacement motor for your JHP2.0 is the Motor 56j Thrd Full 2 Hp - B836.

?     Asked on 2/12/2017 by Christian

My old AO Smith pool motor burned out model # K48M2N110 at 1.5 HP, can I replace upgrade to the ST1202, 2HP unit? And if so, is this the correct impeller to upgrade to? Sp3021-c

A  Answered on 2/13/2017 by InyoPools Product Specialist Scott W.

If your current pump is a Hayward Super 2 then yes, that is the correct impeller to upgrade with the ST1202. That is fine to do that as long as your filter is able to handle the increased flow rate.

?     Asked on 9/5/2016 by Josh

I have two ST1202 pumps, both are models K48N2N, HP, 56J, 1.33, etc, except one is 11.2 Amp, and the other is 12.6-11.4 amp. Question 1: my 11.2A pump is leaking very small of water at the hump on top of the pump, and it shuts off itself every hour or so. Do I need to replace the motor or just a seal somewhere? Question 2: if I need to replace, would the 12.6-11.4 amp model work? Thanks

A  Answered on 9/13/2016 by InyoPools Product Specialist Lennox H.

Hi Josh, Yes, I would recommend that you replace the motor and the seal within the pump and the ST1202 Motor with the Max Load Amps of 12.6-11.4 will work.

?     Asked on 7/18/2016 by Mohamed

Hi My pump give a load noise, I cleaned it but still has same noise, sometime very load. I am listing here the model number and looking for the correct motor replacement , to help me lower this nose. Model: K48M2N111 Volts : 115/230 Amps 19.4/9.7 HZ 60 Ser 19411FM KW 1.55 RPM 3450 Thermally protected: CET36WX

A  Answered on 7/20/2016 by InyoPools Product Specialist Lennox H.

Hi Mohamed, The UST1202 is the correct replacement for model # K48M2N111.

?     Asked on 4/30/2016 by Gary

I have a super II Hayward 2 hp pool pump. Motor Model # C48M2N111A3 "smith motor". Sounds like the bearing are going out, can you tell me the replacement motor I would need? This is the 3rd time I have replaced it in 8 years of owning the pool. Thank you

A  Answered on 5/2/2016 by InyoPools Product Specialist Lennox H.

Hi Gary, This motor (ST1202) will be the correct replacement for the C48M2N111A3. I would also recommend getting the Hayward Super II Pump Tune Up Kit GOKIT2 or GOKIT2SALT.

?     Asked on 2/23/2016 by Jennifer

I have a motor that went out and I'm trying to find the correct replacement. Your help would be appreciated. My pool has a Jandy pump model# SHPM2.5 Serial # n08FB3380 HP 2.5. The motor is HP2.5xS.F1.04= Total2.6 Can you point me to the correct motor? Thanks!

A  Answered on 2/23/2016 by InyoPools Product Specialist Andy O.

Hello Jennifer, The replacement motor you are looking for is A.O. Smith 2.5 HP, 56Y Frame, Up-Rate Motor (B840, B2840) B840.

?     Asked on 1/14/2016 by Al

I am ordering a ST1202 pump, and would like to order a new impeller as well. What is the model number for the appropriate impeller? Is there any way to get them shipped assembled?

A  Answered on 1/15/2016 by InyoPools Product Specialist Andy O.

Al-  The ST1202 motor will fit on several different pumps, in order to find the correct impeller for your pump we would need the model of the pump. And unfortunately, they will not come assembled.

?     Asked on 12/29/2015 by Terry

Is there any advantage to upgrading from a ST 1202 to a ST 1252? And if so, do you have to change the impeller?

A  Answered on 12/30/2015 by InyoPools Product Specialist Hector F.

The ST1202 and UST1252 have the same total hp so you would not need to replace the impeller. There is no real advantage in changing the model.

?     Asked on 9/21/2015 by Blaine

Which bearing fits this motor?

A  Answered on 9/21/2015 by InyoPools Product Specialist Matt S.

The ST1202 requires one 203 opposite shaft-end bearing and one 204 shaft-end bearing.

?     Asked on 8/11/2015 by

is the rotation on this motor CWLE?

A  Answered on 8/13/2015 by InyoPools Product Specialist Lennox H.

Hi, The  A.O. Smith Round Flange 2 HP Full Rate Motor (ST1202) rotates CCWPE.

?     Asked on 2/2/2015 by Larry Wood

I purchased and received the motor above to replace a very loud motor with the description as follows:. A.O. Smith, type :cx , Frame: Y56J, HP:1.5, SF 1.0, Volts: 230/115, Code: E, model: 0-184982-23 Is not installed. Will it fit and work ok?

A  Answered on 2/3/2015 by InyoPools Product Specialist Robert M.

Hello Larry - The motor would fit. However, you would need to upgrade the impeller and possibly the diffuser. These parts would depend on the make and model of your pump.

?     Asked on 10/13/2014 by Guest

What is the difference between ST1202 and UST1202 other than the price.

A  Answered on 10/13/2014 by InyoPools Product Specialist Patrick P.

The ST1202 is a full rated motor with a total HP of 2.6 and the UST1202 is an up-rated motor with a total HP of 2.2.

?     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 1/12/2012 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

1 to 2 hrs

Tools Needed

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

Motor was burnt out

Written on 3/8/2017 by Guest

I saw your video on how to replace a pool motor and I followed the video step by step. The video was very helpful and allowed me to easily replace my motor on my own.

Were these instructions helpful? 


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