Century 4.0 HP Thru-Bolt 56Y Dual Speed 230V Motor - B2235



Part # B235

By Magnetek



Part # B235

Warranty 1 Year

Manufacturer Code B2235

Alternate Part #'s 187126, 187563, 193107, 193315, 193540, 193777, 193834, 196018, 372162103, 5KCP49UN9096X, 5KCP49UN9099X, 7-187563-02, 7-193315-01, 7-196018-01, 7135, 7136, 8-187563-02, 8-187563-05, b2235, b235, F56AA57A01, K63MWEWR-4842, R63MWENA-4727, TT505

Product Description

Century 4.0 HP Thru-Bolt 56Y Dual Speed 230V Motor - B2235

Features: All copper windings, Auto protector, Open drip proof, Stainless steel threaded shaft, Thrubolt pump mount, "1081" design, 60 HZ, 230V, H.P = 4 High Speed / .50 Low Speed, Full load Amps = 12.0 High speed / 3.0 Low Speed, Frame 56Y, Threaded Shaft.

Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
1 HP B235 & B2235 Replacement Spa Motor
3.0 / .38 HP
Waterway HP - SPL Rating:
4.0 / .50
3450/1725 RPM
230 V
12.0/3.0 amp
Stock #:
B235 or B2235
Dimension Letter:
13.37 in.
Waterway #:
Commonly Used On:
Waterway Spa Pumps
California Title 20 Compliant

?     Asked on 12/2/2020 by Chad

I'm looking into a replacement motor for my hot tub?


A  Answered on 12/3/2020 by InyoPools Product Specialist Joe S.

Hello Chad, based on part number 193776 you would need to order the Century 3.0 HP Thru-Bolt 56Y Dual Speed 230V Motor - B2234.

?     Asked on 1/17/2019 by John

I am looking for a two speed start switch and start capacitor for a Century 4.0 motor, part #0-187563-02. Also checking to see if this motor will replace the Century motor I have.

A  Answered on 1/17/2019 by InyoPools Product Specialist Michelle B.

Hello, Unfortunately, we would not carry the two-speed start switch and the capacitor for that motor on our website. This will be the correct motor you will need for your pump.http://www.inyopools.com/Products/07501352022332.htm

?     Asked on 9/17/2018 by

I’m looking for a replacement for my GE motor MOD:5KCP49UN9096X SER NO:H07J030013 V:230 Will this motor work? My panel is saying it has low flow so my heater won’t work.

A  Answered on 9/17/2018 by InyoPools Product Specialist Lennox H.

Hi. Yes, this Motor - B2235 will replace MOD # 5KCP49UN9096X. I don't think the motor is the issue if you're having a low flow issue. Clogged filters and plumbing are the top two reasons. 

?     Asked on 4/28/2017 by Mike

this is a 230V motor can it be wired for 110V?

A  Answered on 4/28/2017 by InyoPools Product Specialist Scott W.

That motor can only be wired for 230V.

?     Asked on 11/25/2016 by Rick Truckor

I have a ao smith motor 4hp pn 7-187563-02 or century number B235 now superseded B2235. I need both the bearings. I have been searching the internet and you have the best information about the parts. It appears that I need bearings 6203. Please let me know if this is correct and I will order the 2 bearings needed. Thanks Rick

A  Answered on 11/28/2016 by InyoPools Product Specialist Andy O.

Hello Rick- Unfortunately we do not have the motor specs for that particular motor. We would need you to call A.O. Smith at 1-800-262-6484 to get the part numbers you need.

?     Asked on 10/7/2016 by

what is the pump that fits this motor?

A  Answered on 10/11/2016 by InyoPools Product Specialist Stacey M.

Hello, the B235 motor is made for Waterway spa pumps. If you would please click here to look at Waterway Pumps.

?     Asked on 6/4/2016 by Steve

Can I use this motor to replace the existing one on my Vita Spa which brand is Century AC MOTOR A. O.SMITH part # 8-193107-01? Thanks!

A  Answered on 6/10/2016 by InyoPools Product Specialist Lennox H.

Hi Steve, This B235 motor will replace p/n 8-193107-01.

?     Asked on 1/18/2012 by Guest

Can you direct me to the proper hi low switch for this motor?

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

Unfortunately the manufacturer does not offer the switch for the 2 speed 220v motors any longer. If you already have a 220 volt timer (on/off) you would need an Intermatic T106R to switch from high to low speed. If you do not have a timer currently you would need the T10604R which is a 220v on/off timer and a high/low timer.

?     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.


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