How to Read a Century Pool Motor Label

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When replacing a dead Century pool pump motor the motor label can appear to be jumble of numbers and letters. This "How to" will guide you through which information is useful in your replacement pump motor search. We also provide tips on essential parts that should be replaced when installing a new pump motor.

Click Here to Find Your Replacement Pool Pump Motor 


Video

Step by Step

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Step 1

Tools you may need: 1. A cloth and cleaning solution, this is needed to remove any dirt or grime causing your pump motor label to be unreadable 2. A Shaft Seal or GOKIT when replacing your motor. Working seals and gaskets are vital to the health of your pool pump. A malfunctioning shaft seal will cause water from the pump to leak into your electrical motor causing it to fail prematurely. A GOKIT includes the complete set of your pumps gasket's and O-rings, including the shaft seal.

Click Here to Find Your Replacement Pool Pump Motor

Click Here to Find Your Pump's Shaft Seal & Gasket Kit 


Step 2

When tracking down a Century replacement motor there are two main markings on the label that can identify a match with a few keystrokes. These are the Catalog (CAT) or Part number. The catalog number is generally listed in the upper left of the label. Century’s CAT number format varies from pump to pump. For example a Pentair pump Century motor may contain a CAT number formatted like B2853 or BN24, where as a Sta-Rite pump motor is formatted as USQ1102R or SQ1202R. If your motor label contains any of these variations a simple search in Inyo's search engine will find the exact motor match.

Step 3

The second of these quick searches is the part number. This number follows the format of a combination of 9 digits in the pattern of "x-xxxxxx-xx". To make this a searchable number first, you must remove the first set and third set of numbers, this will leave the middle six digits. These six digits are worth their weight in gold. If you input them into Inyo's search engine an exact match can be found.

Step 4

Without a CAT or Part number the task of identifying the correct motor becomes more challenging but still achievable.

Step 5

In the situation where the Part and CAT numbers are unreadable the next best option is to back trace the replacement through the Pump model number. The pump model number is located on a tag somewhere on the wet end of the pump usually near the outlet port.

Step 6

Let's use P6RA6E205L as a sample pump model number, if you input this into Inyo's search engine the result is the manufacturer, model, horsepower, and even the service factor category. From there you could click the results and follow a link to the parts breakdown to show a complete parts listing of the pump. If you require only a motor you can write down this information, click Pump Motors under our "Shop by Category" click through the make and model information to find your correct motor replacement.

Click Here to Find Your Replacement Pool Pump Motor

Step 7

A search for the numbers listed above will return with results that though they should be accurate will still need to be matched to your current motor. The information most necessary to confirm compatibility is Horsepower (HP), Service Factor (SF) and Frame (FR).

Step 8

The horsepower of your pump is the measure of power output generated by your motor. Similar to your car engine the higher the horse power the more it can move.

Step 9

The Service Factor of your pump is a somewhat complicated rating in how it actually affects your pump. A simple answer to "What is a service factor?" is that when the SF is multiplied with the HP your pump “True Horsepower” is the product. Service Factor is broken down into two categories Up Rated (1.27 and below) and Full Rated (1.30 and up). When selecting a replacement motor be sure that you are selecting a motor with the same HP in the same category of service factor.

Step 10

The Frame (FR) is how the flange of the pump and shaft side of the motor are configured. Most pool pumps have a frame of 48Y, 56Y, 56J or 56C. The "48" and "56" describe the diameter of the motor casing and the suffix letter is the shape of the flange. A "Y" frame is square, a "J" and "C" are round flanges. When confirming a replacement motor's compatibility be certain that the Frame does match or it will not bolt on to your pump housing.

Step 11

Other information that is on the tag that is not essential to locating a motor match but still good to know are Volts, Amps, and Frame. Volts - Pool pumps normally have a setting of 115v, 230v or 115/230 dual voltage. Tip: Dual voltage motors are set to 230v from the factory so if you plan on using it for the lesser voltage is sure to switch this setting during installation or you may damage your motor. Amps - this is the power consumption of your motor, the higher the amps the higher the electric bill. Your specific pump may have an Energy Efficient motor available as a replacement. Check our Pump Motor section. Time - Pool pump motors are universally rated a CONT (continuous duty). Meaning they run constantly without needing to be shut off RPM - This stands for Revolutions Per Minute, single speed pumps run at 3450 rpm with dual speeds running at 3450 on high and 1725 on low.

Step 12

If by chance any of the above information on the pump is unreadable you may have to do some real digging to find a replacement motor. Read our, "How to identify your Pool Motor without the label guide, this will walk you through which parts have the information necessary to track down a replacement.

Click Here to Find Your Replacement Pool Pump Motor

Click Here to Find Your Pump's Shaft Seal & Gasket Kit 


Comments

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(1 to 40 of 69)

 Posted: 4/6/2020 

My Century Lasar Pool/Spa Motor Serial # is 01918J2. What is my date of manufacture?
 Reply

InyoPools Product Specialist  Posted: 4/6/2020 

Unfortunately, only the manufacturer would be able to identify the date of manufacture of the motor.
 Reply

Anonymous  Posted: 4/7/2020 

Thanks!
 Reply

 Posted: 3/23/2020 

I manage to get it together without the bolts! But I now need a new capacitor my B2853 century
 Reply

InyoPools Product Specialist  Posted: 3/24/2020 

The capacitor replacement for the B2853 is the Run Capacitor, 30 MFD (5VR0303) (2444)
 Reply

 Posted: 3/22/2020 

I need replacement bolts for my B2853 century motor, does your company have any in stock?
 Reply

InyoPools Product Specialist  Posted: 3/23/2020 

What bolts are you referring to? Something like 10-inch thru-bolts? Or the four bolts that connect the motor to the pump. For the latter, we would need to know the model number of the pump housing.
 Reply

 Posted: 12/18/2019 

Wiring diagram for century 2hp motor A B L1 L2 Ground Brother took apart off terminal he forgot how it was took pics but not clear view
 Reply

 Posted: 12/19/2019 

Century Centurion Cat: B855 Serial:31514CH Part: O-177897-22 2.20HP
 Reply

InyoPools Product Specialist  Posted: 12/26/2019 

The image link shows one hot line should be attached to L1 and L2.
 Reply

InyoPools Product Specialist  Posted: 12/18/2019 

If you would like a wiring diagram for the specific motor, we would need to identify that specific motor. What is the part, catalog, or model number from the motor label? See the above guide for examples.
 Reply

 Posted: 3/8/2020 

SP20111NCD 303669 part number
 Reply

InyoPools Product Specialist  Posted: 3/9/2020 

Neither of those numbers bring back a result. Are you sure, those are the Catalog, Part, or Model number and not part of the serial?
 Reply

 Posted: 12/3/2019 

I am trying to determine manufature date of a century B129 pump motor. The serial # is24415CH
 Reply

InyoPools Product Specialist  Posted: 12/4/2019 

As of August 2006 Regal a.k.a. Century motors began stating the day of the year(in your case 244th day) followed by the last two digits of the year(in your case 2015) With that said your motor manufacturer date was September 1st of 2015. 
 Reply

 Posted: 11/6/2019 

Hello, I am trying to identify a replacement for a pump in my hot tube. It is a Century Lasar Pool/Spa Motor, NO Cat #, Part # 7-187554-01, Serial 104103M, Type CXSM Fr Y48Y, RPM 3450/1725, Volts 230, Amps 12.0/3.5, Time CONT, Encl DP, Form PHM, Code D, Any help would be great from a replacement pump. Thanks in advance
 Reply

InyoPools Product Specialist  Posted: 11/7/2019 

You should verify if you copied down that part number correctly. The part number 7-187554-01 does not cross-reference to any motor in our database or catalogs.
 Reply

 Posted: 11/7/2019 

Do you have an email so I may send you a picture of the label from the side of the pump?
 Reply

InyoPools Product Specialist  Posted: 11/8/2019 

You may email us at upload@inyopools.com
 Reply

 Posted: 7/15/2019 

I’m trying to replace my old motor. On the HP and SF reading I have dashes. But then next to the label I have a smaller label that reads HP
 Reply

InyoPools Product Specialist  Posted: 7/16/2019 

The important info needed to match a motor is the part, catalog, or model number. Can you see that info on the motor label?
 Reply

 Posted: 7/11/2019 

I am being given a Century part No. C48D48701 with a 1HP. Is this a valid number? Thanks!
 Reply

InyoPools Product Specialist  Posted: 7/11/2019 

That number does not cross-reference to a part.
 Reply

 Posted: 7/2/2019 

Hi, I have a MagneTek Century Pool and Spa Duty pump...PART = 165124 - 40....HP = 2....TYPE = CS....VOLTS = 220-240....AMPS = 9.7....HZ = 5....RPM = 2850....SF = 1.0....TIME = CONT....CODE = F....FR = N56J....FORM = KJM....INSUL CLASS = B. What is the performance curve or the flow vs head curve like ?
 Reply

InyoPools Product Specialist  Posted: 7/2/2019 

Motors do not have a head rating, only the pump housings do. The same goes for the performance curve. It is matched to the pump and not to a motor.
 Reply

 Posted: 6/28/2019 

Is a C frame and J frame the same?
 Reply

InyoPools Product Specialist  Posted: 7/2/2019 

Yes, they are both round flanges.
 Reply

 Posted: 5/13/2019 

I have a Speck Pool pump with a Century AO Smoth motor. the is no CAT# but the PART # is 7-193005-01. TYPE = CS, FR = W48Y, 1.5 HP , SF = 1.0, 230/115 volts, 8.0/16.0 amps. I need a replacement motor. Can someone guide me to the right part?
 Reply

InyoPools Product Specialist  Posted: 5/13/2019 

Using the method shown in step 3, Inyo's parts search brings up the B854 - 1.5 HP Square Flange 56Y Up Rate Motor as the replacement motor.
 Reply

 Posted: 4/8/2019 

I have a Nordic Impulse hot tub with this spa motor.. PART 7-177781-02 TYPE SPM FR R48Y. How do i know if it has a circulation pump with it TY
 Reply

InyoPools Product Specialist  Posted: 4/8/2019 

I'm a little confused by the question. The motor is a part of the pump, so if there is a motor there is a pump.
 Reply

 Posted: 4/8/2019 

Well...i read where not all spas have a circulation pump but just a 2 speed pump without circulation. When programming the Low Level configuration...level 1 is without circulation etc. 1 pump and 2 speed. What i can't determine is if mine does indeed have circulation so i choose correct configuration
 Reply

InyoPools Product Specialist  Posted: 4/8/2019 

If you only see one pump piped to your hut tub, then that would be a one pump system. If you search the part number in your original post 7-177781-02, it comes back as a two-speed motor.  You may want to contact the manufacturer Nordic Spa if still are not sure what you have.
 Reply

 Posted: 3/31/2019 

The GFCI on my spa kept tripping whenever I turned on the pump motor, a Century model #S48AA11A01. I expected to find corroded contacts or the like, but the guts, wire connections, bearings, coils are clean as new with the exception of a bit of surface rust on the rotor/armature. The line cord has no cracks or obvious issues. How would you continue to troubleshoot this problem?
 Reply

InyoPools Product Specialist  Posted: 4/1/2019 

We have quite a few motor troubleshooting guides. A couple guides to check out first would be: How To Use a Multimeter to Test a Pool Pump Motor - Winding Resistance and How To Troubleshoot a Pool Pump Motor - Motor Shuts Down
 Reply

 Posted: 4/3/2019 

Thank you for your time and suggestion.
 Reply

 Posted: 8/3/2018 

Hello Justin - gallons per minute (GPM) is dependant on the pump housing and the feet of head of your plumbing system as much as it is on the motor. The B854 can be fitted to dozens of pump models, and those pump models have different flow rates. There are pumps for high head and medium head situations. Entry level pumps that can pump just enough and then premium high performance pumps for large pools. Essentially, there is more information needed to properly answer this question.
 Reply

 Posted: 6/27/2018 

I have a Century B2854 and need to know the gallons per minute?
 Reply

 Posted: 6/7/2018 

Hello Ricardo - We do not carry an HST110 motor. To calculate the watts, multiply the voltage by amps.
 Reply

 Posted: 6/7/2018 

I have a Century pool motor, model # HST110. I need to know how many watts, is this motor. I'm planning to run the pump, using Solar energy, you know, panels, controller, battery, inverter an then the motor. Watts info. not on label, can anyone answer, this one?
 Reply