Century 3/4 HP Full Rated North Star Replacement Motor - SN1072



Part # SN1072

By Century Motors

  4.8 Average  



Part # SN1072

Warranty 1 Year

Dimensions 13" L x 7" W x 6.5" D

Alternate Part #'s 187629, 193220, 193682, 7-187629-02, ESN1072, SN1072, SN1102, SP1607Z1BNSC, SPX1607Z1BNS, SPX1610Z1BNS, 35-150-3102, AOS-60-6007, AOSSN1072

Product Description

Full rated 3/4 HP motor; 3450 rpm, 208-230/115; 6.0-5.5/11.0 full load amps; 1.85 service factor; 56J frame

Note: NOT California Title 20 Compliant. 

California Title 20 Compliant Options:


Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
0.75 HP SN1072 & SP1607Z1BNSC Replacement Pool Motor
0.75 HP
3450 RPM
208 - 230/115 V
6 - 5.5/11 amp
Service Factor:
Total HP:
1.39 HP
Stock #:
SN1072 or SP1607Z1BNSC
Dimension Letter:
13.10 in.
Commonly Used On:
Hayward Northstar Pump
Pump Model:
California Title 20 Compliant

?     Asked on 6/10/2021by Neil F Fildes

I have a Hayward Northstar motor 7-187629-02 that went bad, it is 1hp vs this 3/4 hp that matches the part number here. Does the 1/4hp make any difference or do I need to be at 1hp like the previous motor?

A  Answered on 6/10/2021 by InyoPools Product Specialist Craig C.

Hello.  In addition to the motor Horse Power (HP), the motor's Service Factor (SF) plays a significant part in selecting a replacement motor.  The Service Factor is the Horse Power multiplier.  HP X SF = Total Horse Power (THP)  The SF rating can be located on the motor's label.  The Century Motors 3/4HP Full Rated motor model SN1072 has a SF of 1.85, THP of 1.4.  The Century Motors 1.0HP Up Rated motor model USN1102 has a SF rating of 1.4, THP 1.4.  Both motors have identical THP, but different HP and SF.  Providing your current motor's SF rating will further define the correct replacement.   Century 3/4 HP Full Rated North Star Replacement Motor - SN1072     Century 1.0 HP Up Rated NorthStar Replacement Motor - USN1102

?     Asked on 8/30/2018by dave

How many KW per hour does this use? Is it 220 volt like the original Hayward motor?

A  Answered on 8/30/2018 by InyoPools Product Specialist Lennox H.

Hi, Dave. This motor uses 1.27 kW/h

?     Asked on 4/5/2017by gus

I have a hayward 3/4hp northstar pump, motor sn1072. I would like to replace with variable speed motor. Which motor would fit? ECM 16CU?

A  Answered on 4/6/2017 by InyoPools Product Specialist Scott W.

The replacement variable speed motor would be part number ECM16CU.

?     Asked on 11/16/2014by Stu

How many gallons per minute does this model move?

A  Answered on 11/17/2014 by InyoPools Product Specialist Robert M.

Hello Stu - The SN1072 is used on a 3/4HP full rated Northstar Pump. The GPM of a pump is determined by the "total dynamic head" or TDH . Example: At 40' of TDH, the 3/4HP full rated Northstar pump would push 80 GPM.

?     Asked on 1/18/2012by 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 1/12/2012by 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 1/12/2012by 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 1/11/2012by 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.


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Socket Set, Wrench Set, Adjustable Wrench

1     0

bad pool pump motor that needs to be replaced along with seals and gasket.

Written on 7/5/2017 by Guest

Bought two motors, as the first turned out to be defective, would not start; highly unusual. The second motor worked fine. Replacing the motor, seals and gasket required complete disassembly and reassembly of the pump. the process involved disconnecting power, removal of the plate attached to the motor , removal of the non rotating seal in its housing , the rotating seal on the motor shaft and the impeller from the shaft. Replacing the parts and re assembling is straight forward, except that the run capacitor on the motor must be removed to allow locking the motor shaft rotation to assemble the impeller on the shaft. Replacing the finished assembly to the pump is fairly easy, except that if becomes difficult to mate to the body of the pump, because the gasket makes for a tight fit. Use a lot of approved gasket lubricant to all mating surfaces to help the process. Everything takes two or more hours to complete, except that I had to do it twice, due to the defective first motor.

Filing a warranty claim for the bad motor if fairly easy through INYO, except that it seems to take forever to get a resolution. Still waiting for some kind of answer after more than two weeks.

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