What is Service Factor?
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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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Why do I need to purchase a new shaft seal?
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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.
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Why should I purchase a Tune Up Kit?
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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.
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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?
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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.
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I am replacing my motor in my Hayward SP4010x152NS.
Have I selected the correct motor ?
Thanks
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Hello Al - The correct replacement motor is model SPX1610Z2MNS.
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I just ordered this replacement motor. Does it come with toggle switch & cover? if not could you tell me which switch to get?
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The 1.5 HP 56J Thrd Full Rate Motor does not come with a toggle switch and cover, you will need the 2 Speed Toggle Switch (79129900).
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I want to confirm the replacement motor for AO Smith SP1615-Z-2-BC 2 speed 1.5 - 2 HP.
Do I need a tune up kit?
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We would strongly recommend a Tune Up Kit when replacing your motor. You would just need to know which manufacture and model of pump you have, you should be able to find your Tune Up Kit on your Tune Up Kit Page.
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I need the pump tune up kit that goes with my pump. All info if gone from the case.
The motor is a AO Smith B977,56J frame. The pump has 2" inlet and discharge.
The case seal fits into a circular groove.
Thank you for any help,
Robert
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Unfortunately I'd need the model of the pump to find the correct seal kit for your pump.
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Motor not starting on high speed. Starts on low, then high from running on low. Capacitor replacement or motor winding at fault?
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Hi, Bill. The reasons you've listed can lead to the problem that you're having. You can take the motor to a shop so that it can be tested to confirm which one is the culprit.
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Is the B2977 motor interchangeable with the STS 1152R? The only difference I found is the lower speed horse power, 0.2 hp compared to 0.25 for the STS. The B2977 seems to be a newer model. I have Hayward pump SP4010X152 and need to replace the motor.
Thanks
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This two motor are going to be the same, the STS1152R is just going to be the newer model.
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Will this work with a Hayward Super II housing ? What is the advantage of the newer STS1152r motor over this model?
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Hi, Steve. Yes, this B977 motor will fit the Hayward Super II Pump housing. The physical dimensions are the difference between the two motors.
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this is the exact replacement for the pump I have, but since I can't find anyone who can hook it up to the timer box to run two-speed, is there an exact one-speed alternative?
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I bought this motor from INYO to replace B977. All is OK except the terminal box cover is a different design and appears not to be compatible with the hi/lo switch which you recommend, P/N 5271-75 (17590450). The new terminal box cover is plastic. The old design was metal and had a hatch that could be replaced with the hi-lo switch assembly. I am currently using the motor in single speed mode. Do you have a suggested solution for this problem?
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Hi, Ronan. Century had a motor design change. You will need the Toggle Switch and Canopy Kit - 2512558-001. A return will be set up so that you return Part #17590450. You will have to purchase the Toggle Switch and Canopy Kit - 2512558-001.
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Hi, replacing pump motor SP -1615- z2- mc. The unit I have states 2 hp and this one appears to be 1.5 hp? Is there a model change since I replaced the last time?
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Is this replacement motor for hayward model sp4010x152NS which seems to be obsolete now.
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Hi Scott, This motor on this page is not the proper replacement motor for your Northstar. You will need this 1.5 HP Dual Speed Northstar Replacement Motor - SPX1610Z2MNS we do currently have this motor in stock ready to ship.
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Would this be the CA title 20 replacement for pump pictured? Just want to confirm before buying. Thanks for also linking the toggle switch.
Hello, Yes, this motor is Title 20 compliant. Please note that this motor is 230v only. If you are running 115v, you will need to upgrade to 230v.
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Can the 1.5 HP Full Rate Two Speed Motor W/ Timer - Round Flange (B977T, B2977T) be purchased in California?
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Hi, Roland. The B2977T motor is no longer being made, you can use this B2977 option but will need to purchase the Dual Speed Controller - T10604R or Toggle Switch - 2512558-001.
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I want to replace my Jandy PHP1.0 with your 1.5 HP Full Rate Two Speed Motor W/ Timer - Round Flange (B977T, B2977T) for my pool waterfall. Can I put this 1.5HP on if the previous motor was 1.0 HP ?
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What is your seals kit order# for the B2977 motor?
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Hi, Roland. Tune up kits are specific to the pump housing, not the motor. Finding the Tune-Up Kit for Your Pool Pump
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How long would it take to get this pump motor to me in Northern Virginia? (Century model B2977)
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Hello Thomas, as of 10/21/2020 these units are in stock. Shipping currently could be 3-5 business days.
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Do you have a 2hp version that is california compliant?
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The 2HP version would be part number 5389X (B2979).
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our pump has model ust1202 motor but since it is not california compliant this model was recommended. Do we need additional parts to be able to replace it with this b2977 model? Any electrical parts or connections needed?
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You will need a way to switch the high and low speeds. The switch is part number 17590450. You'd also want to replace the pump seals when you replace the motor. What is the make and model of the pump side? If you are unsure, send us a picture of the complete pump.
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Which 2 speed toggle switch does this motor need- 17590450 or 2512558-001 ?
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This motor will use this Dual Speed Switch - 17590450
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I am confused about square flange versus round flange. Does the square flange take the place of the square motor mounting plate that is part of the pump (Hayward Part SPX1600F5 for example)?
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Hello. The End Bell design of any given motor identifies it as a round (sometimes referred to as a C face) or square flange variety. Attached please find several pictures which may help clarify the difference. In answer to your question, no, the square motor mounting bracket does not allow for a change in the End Bell design. AOS Shaft End Bell Round Flange 203 Bearing (SAW-60 Motor ,Two Compartment C-Face Keyed 1.5HP Sgl Spd 115/230V (SK1152) Shaft End Bell, Sq.flange (203) (saw-49) Century 3/4 HP Square Flange 48Y Up Rate Motor - USQ1072
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