Polaris P61 replacement motor for the PB4-60 booster pump, Century B625Polaris PB4-60 Booster Pump Replacement Motor P61, Century B625 Compatible In stock$38099
Polaris P61 replacement motor for the PB4-60 booster pump, Century B625
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Polaris PB4-60 Booster Pump Replacement Motor P61, Century B625 Compatible

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$38099
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Quick overview

  • Direct fit for the PB4-60 Sold as Polaris P61 and Century (A.O. Smith) B625, the motor the PB4-60 booster pump was built around.
  • 3/4 HP with a 1.5 service factor Label horsepower 3/4, effective horsepower 1.125, matched to the booster pump wet end.
  • Dual voltage Wires for 115 or 230 volts single phase, drawing 6.4 or 12.8 amps depending on the supply.
  • 56CZ frame, threaded shaft The impeller threads straight onto the motor shaft, no coupling to line up.
  • Top mounted start capacitor The 124 to 149 uF, 110 VAC start capacitor sits on top of the motor where it is easy to reach.
  • Compact package 10 in. long excluding the shaft, 6-1/2 in. in diameter, with a 3-3/4 in. shaft.
Full description and specifications ↓

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Product details

The Polaris P61 is the replacement motor for the PB4-60 booster pump that drives Polaris pressure side cleaners. It is the same motor Century (formerly A.O. Smith) sells as catalog number B625, part number 7-173840-23, so whichever number is on your old motor, this is the match.

Electrical

Label horsepower is 3/4 with a 1.5 service factor, for an effective 1.125 HP. The motor runs on 115 or 230 volts single phase and draws 6.4 or 12.8 amps depending on the voltage selected. The start capacitor, rated 124 to 149 uF at 110 VAC, is mounted on top of the motor rather than buried inside it, which makes a future capacitor swap a five minute job.

Mechanical

It is a 56CZ frame with a threaded shaft, so the booster pump impeller spins directly onto it. The body is 10 in. long excluding the shaft and 6-1/2 in. in diameter, and the shaft extends 3-3/4 in. It appears in both the standard and new style PB4-60 parts diagrams.

Before you order

The shaft seal is not included. Replace it whenever the motor comes off, and check the impeller and seal plate for wear while the wet end is open.

From Pool School

Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read

Where this part goes

1 Key 1 on the Polaris PB4-60 Booster PumpFits every model in the drawing.See it on the diagramAll Polaris Booster Pump Parts 34 parts and the drawing
Specifications
Brand Polaris
Manufacturer part number P61
Century catalog number B625
Century part number 7-173840-23
UPC 738919002678
Fits Polaris PB4-60 booster pump
Frame 56CZ
Shaft Threaded
Label horsepower 3/4
Service factor 1.5
Effective horsepower 1.125
Voltage 115/230 V single phase
Amp draw 6.4/12.8
Start capacitor 124-149 uF, 110 VAC, mounted on top of the motor
Length 10 in. excluding shaft
Shaft length 3-3/4 in.
Diameter 6-1/2 in.
Shipping weight 25.2 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Is this the same motor as the Century B625?
Yes. Polaris sells it as P61 and Century, formerly A.O. Smith, catalogs it as B625 with part number 7-173840-23. Either number gets you this motor.
Does it fit both the old style and new style PB4-60?
It is listed in both the Polaris PB4-60 and the PB4-60 new style parts breakdowns, so it serves either version of the pump.
Can I run it on 115 volts?
Yes. It is a dual voltage single phase motor, 115 or 230 volts. Set the voltage selector to match your supply before wiring it. Draw is 6.4 or 12.8 amps depending on the voltage.
Should I replace anything else while the pump is apart?
The motor ships on its own. Any time a booster pump motor comes off, the shaft seal should be replaced too, so order a PB4-60 seal kit with it and do both in one visit.
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