By Century Motors



Part # ST1052

Warranty 1 Year

Dimensions 11" L x 9" W x 6.5" D

Alternate Part #'s 110281, 14290, 15093, 164563, 177481, 18330, 184947, 1K045, 5KC33JN2513X, 82537, 90118563, 91721, B126, B136, B526, C1098, C48H2N109A2, C48H2N109A3, C48J2DA154, C48J2DB154, C48J2DB160A1, C48J2N102, C48J2N104, C48J2N105, C48J2N112, C48J2N116A1, C48J2N116A3, C48J2N116A7, C48J2N119, C48J2N121, C48J2N121A2, C48J2N122, C48J2N123, C48J2N125, C48J2N126, C48J2N130, C48J2N131B1, C48J2N131B3, C48J2N131C2, CT105C, EB126, JD50FL1, M542, S48H2N10, S48H2N102, S48H2N104, S48H2N113, S48H2N114, S48H2N120, S48H2N122, S48H2N122A3, S48H2N122A4, S48H2N122A5, ST1052, SW2556, V18330, 35-126-3020, AOS-60-5062, AOSST1052

Product Description

Voltage 115/230, Max Amps 115V = 11.0 230V = 5.5, Single Speed, Round Flange, RPM = 3450, Threaded Shaft, Frame = 56J Used on the following models: Hayward Max Flow, Hayward Super Pump, Hayward Super II, HaywardNorthstar and Jacuzzi Magnum pumps.

Note: NOT California Title 20 Compliant. 

California Title 20 Compliant Option:  EVC130

Product Specifications

0.5 HP
115/230 V
11.0/5.5 amp
Service Factor:
Total HP:
0.8 HP
Century (A.O. Smith)
3450 RPM
Single Phase

?     Asked on 6/11/2016by rod

my timer got stuck on the clip and the motor kept trying to go off but couldn't so, did I burn out the motor or the bearing. It still hums when I turn the power on after I let it cool off but want pump water to the filter.

A  Answered on 6/11/2016 by InyoPools Product Specialist Alan M.

It is possible that the motor has burned out. You will need to remove the motor from the pump housing and test to see if the motor is still turning the impeller. If yes, try is out when connected to the pump to see if it will primp and circulate water. If it is not turning, it is time to get a new motor.

?     Asked on 4/13/2017by Keenan

Is there a VFD you can recommend that can be wired to this 0.5hp motor?

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

Unfortunately, I am not aware of one for that low of horsepower. Not saying that they do not go lower, but the lowest I have seen them go is 1HP.

?     Asked on 6/12/2017by Don

I need a 1hp motor for a jacuzzi magnum 1000 . My pump has a lock ring on it.

A  Answered on 6/16/2017 by InyoPools Product Specialist Lennox H.

Hi, Dom. Based on the info I've gathered the Magnum 1000 uses a 50Hz motor which we do not sell. If that's not the case and it uses a 60Hz motor the UST1102 Motor would be the correct replacement. In order to confirm we'll need the motor info.

?     Asked on 7/16/2017by gary

i have a century 2 speed 2 hp 1081 pool and spa motor now, sp1615z2msc I know 1 1/2 hp pump is enough for my pool will this motor replace mine size wise

A  Answered on 7/22/2017 by InyoPools Product Specialist Lennox H.

Hi, Gary. The correct replacement motor is the Century B977 Motor. This 1/2 hp motor may not provide enough water flow to turn over the water depending on your pools feet of head. 

?     Asked on 5/22/2018by J

I have a Hayward super pump 3/4 hp need motor replaced l run pump 24-7 230 v which one do u recommend ?

A  Answered on 5/22/2018 by InyoPools Product Specialist Lennox H.

Hi, J. You can use this ST1052 or the UST1072 as a replacement for the Hayward Super Pump 3/4 HP. 


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