A.O. Smith 1.5 HP Thru-Bolt 48Y Dual Speed Motor - BN50V1



Part # BN50

By Magnetek

  5 Average  



Part # BN50

Warranty 1 Year

Manufacturer Code BN50V1

Dimensions 12" L x 8.5" W x 5.5" D

Alternate Part #'s 1-184843-03, 10-177803-02, 10-184843-02, 165744, 177803, 1778030J, 181458, 184167, 184843, 186268, 186276, 187067, 190611, 193076, 193824, 1D163, 3051260, 3420610, 620032032, 7-165744-01, 7-177803-01, 7-177803-02, 7-181458-01, 7-181458-02, 7-181458-82, 7-184167-02, 7-184843-01, 7-184843-02, 7-184843-03, 717780302, 90177044, agl15fl2cs, BN50V1, BN60, C1325, C48A21A24, C48A47A79, C48B21A01, C48M2A16, C48M2A161A1, C48M2A16A1, C48M2A16A2, C48M2A16A3, C48M2A16A4, C48M2A24, C55MWJKN4528, MGT605144, S48M2A3, SP1515Z24E, SP1515Z24EBK, SP1515Z2E, spl15fl2s, TBS1152V1

Product Description

A.O. Smith 1.5 HP Thru-Bolt 48Y Dual Speed 115V Motor - BN50V1

Application: Above Ground Pools & Spas Replaces: Sta-Rite, Hayward, American Products, Hydra Bath, Pac Fab, Jacuzzi, Doughboy, Etc... Features: All copper windins, Auto protector, Open drip proof, Stainless steel threaded shaft, Thrubolt pump mount, "1081" design, 60 HZ , 115V, H.P = 1.5 High Speed / .188 Low Speed, Full load Amps = 13.5 High speed / 4.7 Low Speed, Frame 48Y, Threaded Shaft


Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
1.5 HP BN50 & BN50SS Replacement Pool Motor
1.5/ .25 HP
3450/1725 RPM
115 V
16.4/4.4 amp
Service Factor:
Total HP:
1.5 HP
Stock #:
BN50 or BN50SS
Overload Protector:
Dimension Letter:
12.83 in.
Commonly Used On:
Sta-Rite, Hayward, American Products, Hydra Bath, Pac Fab, Jacuzzi, Doughboy

?     Asked on 9/19/2019 by Judy

So I must purchase elsewhere? Can I not use this motor? The part is for your motor right? Do you not know what type seal to use?

A  Answered on 9/26/2019 by InyoPools Product Specialist Hector F.

Yes, we do carry the BN50V1 and I was able to locate on Carvin/Jacuzzi's web page that the shaft seal is part number 5250-1212.  We just do not carry the actual complete seal kit, the complete pump or those pump main parts besides the motor. 

?     Asked on 9/18/2019 by Judy

What pump shaft seal is needed for Sharkjet pump 94022467? Also tune up kit. Purchasing BN50V1 motor.


A  Answered on 9/18/2019 by InyoPools Product Specialist Hector F.

Unfortunately, we do not carry parts for the Jacuzzi Sharkjet pool pump.

?     Asked on 9/7/2019 by Mike

Correct replacement? I ask also because the original is 2hp while this motor is 1.5hp. Is this an issue? Thanks!


A  Answered on 9/13/2019 by InyoPools Product Specialist Alex V.

Mike, Yes, the BN50 would be the correct replacement. A 2.0 HP SPL is actually a 1.5 HP. The "SPL" is a special rating that some manufacturers use to rate their pumps an motors. Please be sure to change your shaft seal when you replace the motor. 

?     Asked on 8/16/2019 by Tom

Will this replace a JWPS5YGL-A2 Sta-rite motor? I don' need the 2 HP so this 1 1/2 will be OK. Thanks


A  Answered on 8/18/2019 by InyoPools Product Specialist Lennox H.

Hi, Tom. This BN50V1 motor is okay to be used. 

?     Asked on 7/28/2019 by Grasham

I need to replace the pump and motor on a o Smith part 7-177803-02 frame u48y rpm 3450 115 volt 1.5 horse power cat BN50, 1 1/2 fittings. I also want to purchase the capacitor. Mine is in the inside cover of the motor. Could you help me. The BN50 looks like the motor I need to order but the capacitor is on the top


A  Answered on 8/9/2019 by InyoPools Product Specialist Joe S.

Good day, yes this would be the correct motor and the START CAPACITOR, 108-130 MFD (BC-108) PART # 5270-10

?     Asked on 5/22/2019 by

I have the A.O. Smith 1.5 HP Thru-Bolt 48Y Dual Speed Motor - BN50V1 already. Is there a pump that you recommend?

A  Answered on 5/22/2019 by InyoPools Product Specialist Lennox H.

Hi. This BN50V1 motor can be used with many different pumps for pool and spa applications. In order to assist you, I will need to know the model of your pump. 

?     Asked on 3/28/2019 by sue

Could this be used to replace a pentair dynamo 1hp? Yes, I realize the hi/low/off switch is also needed.


A  Answered on 3/31/2019 by InyoPools Product Specialist Lennox H.

Hi, Sue. Yes, this BN50V1 can be used as a replacement. You will also need the Dynamo Pump Tune Up Kit - GOKIT46.

?     Asked on 3/8/2019 by Ted

Hi, Will this pump work as a replacement for the Century P/N: 0-193391-02 pump? I am looking for a 2 speed pump to save some money in the long run and this seems to be it. I know I will need to purchase a switch. This a pic of current pump data plate. Thanks for any help-guidance.


A  Answered on 3/8/2019 by InyoPools Product Specialist Lennox H.

Hi, Ted. Yes, this BN50V1 along with the Two-Speed Toggle Switch Assy. - Lo/Off/Hi - 18313301 can be used as a dual speed replacement for your existing motor. You can also use the Hayward OEM Motor w/ Switch - SPX1515Z2ES.

?     Asked on 4/15/2018 by MB

Trying to replace a magnetek century pool spa pump and motor catalog # 7-184843-03 serial# BT8-19. Will this product replace it?

A  Answered on 4/16/2018 by InyoPools Product Specialist Hector F.

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

?     Asked on 2/23/2018 by jesse

Looking to get a replacement motor for an Avalanche AV60. The label on the motor shows 1.5 Spl (2spd); serial: BY09-18; part: 7-181327-03; Type: CSM; FR: R48Y; RPM 3450/1725; Volts: 115; Amps: 12.0/3.1; TIME: CONT; ENCL: DP; FORM: PHM; CODE: A. The Label on the housing shows S15TLR9-3-S1.

A  Answered on 2/23/2018 by InyoPools Product Specialist Lennox H.

Hi, Jesse. The correct replacement motor is the Century BN37V1 motor. The SPL HP is not the actual horsepower of the motor so you cannot use that. I will also recommend that you get the Jacuzzi LR Series Tune Up Kit - GOKIT41.

?     Asked on 9/16/2017 by Bob

I have a OptiFlo high performance pump. It's 1.5 HP spl. Serial # 0360257 1201398 and model # 193262. What would be the correct replacement motor? Thanks for your help.

A  Answered on 9/20/2017 by InyoPools Product Specialist Lennox H.

Hi, Bob. The Century 1 H.P 115V Thru Bolt Motor - BN25 is the correct replacement for model #193262. 

?     Asked on 6/17/2017 by

I previously asked if this motor will replace my flow master xp2. The model number is 06614000-5. Could this work?

A  Answered on 6/18/2017 by InyoPools Product Specialist Lennox H.

Hi. Yes, this motor can be used to operate the XP2 Pump 06614000-5.

?     Asked on 6/16/2017 by paola

I am trying to replace my flow master XP2, 2 speed for my hot tub. Will this be compatible?

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

Hi, Paola. This motor can be used to operate selected Flo-Master XP2 pumps models. I can not confirm without the pump model or the motor's part or cat number.

?     Asked on 5/28/2017 by Daniel Lewis

Trying to match a magnatek 1.5 hp, 2 speed, part # 10-181327-03 type CSM, 115 volt, AMPS 12.0/3.1, rpm 3450/1725, FR R48Y, serial BU3-13 Thanks, Dan

A  Answered on 5/28/2017 by InyoPools Product Specialist Patrick P.

Hi Daniel, This motor here would be the proper replacement motor for your 10-181327-03 motor.

?     Asked on 5/23/2017 by Gary

Looking for motor bearings for the BN50 and can't seem to find them described anywhere in a parts reference.

A  Answered on 5/23/2017 by InyoPools Product Specialist Stacey M.

Hello Gary, I apologize, but we don't have any listed for that type motor.

?     Asked on 11/1/2016 by tom n

is it possible that the seal on the motor goes bad and I just have to buy a motor ? the pump is apart from the motor right?

A  Answered on 11/1/2016 by InyoPools Product Specialist Scott W.

If you are replacing the motor you will also need to replace the shaft seal. I can help you with that, I just need the model of your pump. If you do not know attach a picture of your complete pump and I will identify it for you.

?     Asked on 9/26/2016 by half hand

can this motor's speed be varied or are the rpms fixed?

A  Answered on 9/26/2016 by InyoPools Product Specialist Stacey M.

Hello, normally on a single speed motor the RPM is 3450, but for a duel it's 3450/1725. This BN50 is a duel speed motor which has 1.5hp or .25hp.

?     Asked on 9/13/2016 by Robin

We have an AO Smuth spa motor and are looking into buying parts to fix a leak, or possibly replacing the entire motor. Current part#: 7-177803-02, FR: U48Y, Type: CDM, PH: 1, CAT: BN50, Volts: 115. Would this be the correct replacement motor? Also, are there any replacement parts available for the pump we currently have?

A  Answered on 9/14/2016 by InyoPools Product Specialist Scott W.

The BN50 is the correct replacement motor. For me to find the correct seals and gasket for your pump, I'll need to know what model your pump is that the motor goes to.

?     Asked on 8/7/2016 by Kay

Is the BN50V1 the replacement pump for A>O> Smith century lasar 101458

A  Answered on 8/12/2016 by InyoPools Product Specialist Lennox H.

Hi Kay, I was not able to cross reference the info provided to the BN50V1 motor. If you can provide additional info like the pump model, CAT, PART or MOD number I can confirm if it is.

?     Asked on 7/10/2016 by Bob

I am getting a1 1/2 HP 2 Speed 115V Thru Bolt Motor (External Capacitor) - BN50 motor to replace a bad motor in my spa. (this is supposed to replace the bad motor: Emerson T55MWBLJ motor). The pump attached to the end of the motor is: 6500-345. Can you tell me which "tuneup" o-ring seal kit to get for this pump? Thanks, Bob

A  Answered on 7/14/2016 by InyoPools Product Specialist Lennox H.

Hi Bob, We do not have a tune up kit available for the 6500-345 model pump but the Jacuzzi Shaft Seal 200 3/4" (10150209) and Cover Gasket (47025853) are the parts needed. If you need any other parts they can be found on the Jacuzzi Piranha Series Pump Parts page.

?     Asked on 6/26/2016 by Jeff

I'm looking to replace my motor for my waterway pump. I have a A.O. Smith motor HP 1.5 - .18 SPL, MODEL # PH2150-3R, CAT # BN37, PART # 7-177782-03, FR R48Y, VOLTS 115, AMPS 11.0/2.9, TWIST LOCK CORD

A  Answered on 7/3/2016 by InyoPools Product Specialist Lennox H.

Hi Jeff, The BN37 motor is the correct motor for the PH2150-3R pump. The "SPL" does not reference the actual hp of the pump.

?     Asked on 4/11/2016 by andrea

I am looking for a 50 cycle motor for my 1.5 hp Pentair Opti Flow pump.

A  Answered on 4/11/2016 by InyoPools Product Specialist Alan M.

Hello Andrea, I found the Pentair Optiflo Pump - 3/4 to 1 1/2 HP Parts breakdown. In the motor section (#15) the single speed replacement for your pump is the 1.5 H.P 230/115V Thru Bolt Motor (BN35). I was not able to find reference to any additional 50 cycle motor. (There is also a 1 1/2 HP 2 Speed 115V Thru Bolt Motor available as well part #BN50)

?     Asked on 7/15/2015 by T Nonan

Hi, I have a Magnatek 7-177803-02 pool/spa motor , 2 speed, 115 v, 16.4/4.4 amps that has a broken toggle switch. Can you furnish part number, price and availability? Thanks T Nonan

A  Answered on 7/16/2015 by InyoPools Product Specialist Lennox H.

Hi, We will have to know what model or p/n of the 2 Speed Toggle Switch that you have operating that motor. If you're not sure you can replace the entire cover with the 2 Speed Toggle Switch (18313301).

?     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.

?     Asked on 5/16/2007 by Guest

Can you replace single speed pump motor with dual speed pump motor?

A  Answered on 5/16/2007 by InyoPools Product Specialist Patrick P.

Yes but you can't go with a higher HP than the single speed motor. For example if you have a 1 HP single speed you cannot go with a 1.5 HP dual speed motor; you would be able to use a 1 HP dual speed motor. Customer would need to purchase a toggle switch or timer to switch from high speed to low speed.


Review Summary

 (Average 5  out of 5 stars)
3 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews