Part # B849

Warranty 1 Year

Alternate Part #'s 10-168345-25, 10-168787-07, 1103675401, 135107, 164960, 168787, 177477, 177896, 17789600, 190023, 193268, 35-5333, 7-168345-25, 7-168787-07, 7-168787-87, 7-177896-22, 717789622, 8-168345-25, 8-168787-01, 8-168787-02, 8-168787-06, 8-168787-07, A0104700, A100FH, A100FHL, B747, C1307, MGT605113, S88-382, SQ115, _B849, AOSB849, B2849, MGT-60-5113

Product Description

Century 1.5 HP Square Flange 56Y Full Rate Motor - B849

Note: NOT California Title 20 Compliant. 

Dual Speed Option: (Not Compliant)

California Title 20 Compliant Option:

Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
1.5 HP B849 & B2849 Replacement Pool Motor
1.5 HP
3450 RPM
230 V
10 amp
Service Factor:
Total HP:
2.25 HP
Stock #:
B849 or B2849
Overload Protector:
Dimension Letter:
13.4 in.
Commonly Used On:
Pentair, Sta-Rite, Jandy and Waterway

?     Asked on 1/11/2012by 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 12/13/2016by Jim

I have the AO Smith Part #7-177896-22, HP 1.5, SF 1.50 and FR Y56Y. Recently it started making a very loud noise while it is pumping. It continues to pump the water for my pool, but makes this loud noise. Can the pump be repaired or does it need to be replaced?

A  Answered on 12/13/2016 by InyoPools Product Specialist Adam Y.

Good afternoon Jim, Sounds like bearings. This is repairable but a little technical we do sell the bearings and have a how to guide on our site with a video. You can purchase the bearings also part#6203. I would recommend taking it to a professional motor repair shop if you are unsure.

?     Asked on 12/19/2016by Jim

Adam, Thank you for your assistance. I think the best is for me to buy a new motor rather than tackle the bearings. Do I also need the repair kit which has the various O rings, etc. ? Thanks, Jim

A  Answered on 12/20/2016 by InyoPools Product Specialist Adam Y.

Good morning Jim, Yes I would recommend replacing the seal and o-rings. The shaft seal is the most important but since you have it out you might as well replace everything. If you let me know what type of pump you have I can refer the correct kit.

?     Asked on 9/4/2018by Chris

I need to replace this motor on a waterfall pump. Is there a more energy efficient option?

A  Answered on 9/6/2018 by InyoPools Product Specialist Lennox H.

Hi, Chris. The Century B2842 is an energy efficient option to this B2849.

?     Asked on 4/2/2019by KM

Can you tell me the part numbers for both the run and start capacitor for the A.O. Smith motor B849? Thanks.

A  Answered on 4/4/2019 by InyoPools Product Specialist Hector F.

This motor only has a run capacitor part 5270-05


Est. Repair Time

Less than 1 hr

Tools Needed

Screwdriver, Wrench Set

Old motor was loud and noisy.

Written on 5/24/2021 by Guest

I ordered the new motor and replaced it very easily with the new one. Once the motor was installed, I turned on the pool and it worked perfectly without any problems.

Were these instructions helpful? 


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 (Average 4.75  out of 5 stars)
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