3/4 HP Standard Motor - Full Rate (B847, B2847)



  (4.7 out of 5 Stars on 10 Ratings)

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Product Details


ALTERNATE PART #'S0-177474-01, 1-168919-06, 10-168919-06, 10-177079-04, 1103655401, 1103655402, 135105, 15815, 164652, 164961, 165190, 165903, 168452, 168919, 177079, 177215, 177474, 190021, 193267, 193985, 35-5339, 35-5399, 355339, 5KC38SN6085AX, 5KC38SN6085X, 5U124, 5U159, 6-177079-40, 7-168452-04, 7-168452-84, 7-177079-04, 7-177474-01, 7-177474-61, 7-177474-81, 75233, 8-165903-20, 8-165903-21, 8-168452-04, 8-168452-20, 8-177079-04, 8-177079-40, 8-177474-01, 8-177474-10, A0104900, A100DH, A100DHL, B623, B847, C1305, C48K2EB102A2, EB847, ESQ1072, P712, S88-380, SQ107, SQ1072, SQD75FL1, V15815

Product Description

A.O. Smith Centurion replacement motor for Pentair WhisperFlo and Challenger full rated pumps. Specifications: HP = 3/4, RPM = 3450, Voltage = 115/230, Amps = 14.2/7.1, Service Factor = 1.65, Frame = 56Y, Shaft = Threaded. *Please Note: This is the correct replacement motor for the Challenger 3/4 HP full-rated pump.

Motor Dimensions Motor Dimensions Motor Image Motor Image
Motor Name:
0.75 HP B847 & B2847 Replacement Pool Motor
0.75 HP
3450 RPM
230/115 V
7.1/14.2 amp
Service Factor:
Total HP:
1.24 HP
Stock #:
B847 or B2847
Overload Protector:
Dimension Letter:
12.4 in.
Commonly Used On:
Pentair WhisperFlo and Challenger
Ask a Question

Asked on 02/16/2012 by Guest

I just finished replacing the shaft seal on my booster pump. As soon as I turned the pump on water was leaking from the shaft seal. Is it defective or am I doing something wrong?

Answered on 02/16/2012 by Product Specialist Patrick P.

Depending on the model, the installation of a booster pump shaft seal can be slightly different than a pool pump shaft seal. Some booster pump and pool pump shaft seals require that a silicone sealant be used on the outer areas of the metal seat of the shaft seal. The seal will need to be lightly hammered into the body of the pump. You can use a 1 inch PVC coupling or a piece of 1 1/4 inch PVC pipe and a rubber mallet. This procedure will apply to any pool pump or booster pump using a >PS-1000 style shaft seal.

Asked on 01/19/2012 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?

Answered on 01/19/2012 by 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 01/12/2012 by Guest

Why should I purchase a Tune Up Kit?

Answered on 01/12/2012 by 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 01/12/2012 by Guest

Why do I need to purchase a new shaft seal?

Answered on 01/12/2012 by 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 01/11/2012 by Guest

What is Service Factor?

Answered on 01/11/2012 by 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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Customer Reviews

Ratings Summary

Average Rating:   (4.7 out of 5 Stars)

Recommended: (100%) 10 of 10 customers would recommend this product to a friend.

10 Ratings 5 star:   (7) 4 star:   (3) 3 star: (0) 2 star: (0) 1 star: (0)

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The Most Helpful Review

21 of 23 people found the following review helpful:

   (5 out of 5 Stars) Pool Filter Motor

Reviewed By: from Bowie, Maryland ()

Pros: Customer service, shipping time, price and product

Cons: None that I can think of

Best of all is the wonderful customer service help provided by Inyopools. The product was here in the time specified and the price was considerably less than the 5 other companies I checked with first. The product was as specified and ordered and hasn't given me any problems to date. It was installed about a month ago.

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The Most Recent Reviews

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   (5 out of 5 Stars) Quiet and inexpensive

Reviewed By: from Palm Bay,FL ()

So far so good. Replacement is the same as the on removed. I'll give you a full report in 8 years like the first one lasted.

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   (5 out of 5 Stars) Motor runs great

Reviewed By: ()

Ships quick received motor installed & runs great so far. Good customer service with Inyo.

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   (4 out of 5 Stars) works great

Reviewed By: ()

It arrived when they said it would. Easy to install and works great.

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   (5 out of 5 Stars) perfect pool pump that fit exaxt!

Reviewed By: from Ruskin, FL ()

Pros: exact fit and fast shipping

Cons: none

The pump fit exactly like it should, shipping was fast and I would highly recommend

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   (5 out of 5 Stars)

Reviewed By: from Arcadia, Fl. ()

Pros: quick ship, installed same day, runs great, no surprises

Cons: none

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3 of 3 people found the following review helpful:

   (5 out of 5 Stars) The replacement motor you want

Reviewed By: from Raleigh, NC ()

Pros: Easy to install

Cons: none

I installed this motor on a five year old Pentair pump with failing bearings. It took me under an hour and I had never done it before. It's working great and is quieter than the pump was when it was new. You should replace the seal and use the kit they sell at INYO and you can replace some gaskets at the same time.

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