U.S. Motors (Nidec) replacement pool pump motor – 3/4 HP, 115V, two speed, 56Y frame

⚙️ What this motor is

This is a replacement motor only, not a complete pump. It is a square flange motor, which you can recognise by a square plate on the pump end with a bolt through each corner. It is a 56Y frame with a threaded shaft. It runs on 115V, two speed. It bolts to the wet end you already have, so the pump housing, impeller and plumbing stay where they are.

✅ Check these before you order

Compare total horsepower, not nameplate horsepower. Multiply the horsepower on your old motor’s label by the service factor next to it, and compare that figure. This motor is rated 3/4 HP.
Mounting. Square flange, C-face and thru-bolt motors are not interchangeable and there is no adapter between them, so check yours matches before ordering.
Frame size. Measure across the round body of the motor: roughly 5-1/2 to 5-7/8 inches is a 48 frame, roughly 6-1/2 to 6-3/4 inches is a 56 frame. Measuring beats reading the old label, because some makers labelled 48 frame motors as 56. This one is a 56Y frame.
Shaft. This motor has a threaded shaft. A threaded shaft has the impeller screwed straight onto it; a keyed shaft is smooth with a groove down it. The two are not interchangeable.
Voltage. This motor is 115V. Read it off the old motor’s label rather than assuming from the wiring – a spa wired for 240V can still run a 120V pump.

🔧 When you fit it

Fit a new shaft seal at the same time. A failed shaft seal lets water into the motor and is the most common reason a motor dies. Reusing the old one on a new motor is the quickest way to ruin it.
Rotation. Pool and spa motors turn counter-clockwise seen from the shaft end, shown on the label as CCW or CCWPE. They cannot be reversed by swapping wires, so check the old label if it says anything different.
Keep the horsepower the same unless you are changing the impeller too – the impeller is matched to the motor’s output.

🔩 Technical specifications

Specification	Value
Manufacturer part number	EB981
UPC	786382051495
Brand	U.S. Motors (Nidec)
Application	Pool pump motor
Horsepower	3/4 HP
Speed	2-speed
Voltage	115V
Frequency	60 Hz
Current draw	14.5 A high speed / 5.3 A low speed at 115V
Phase	Single phase
RPM	3,450 / 1,725 RPM
Motor frame	56Y frame
Frame dimensions	56Y frame, 6-1/2 in frame diameter, 5/8 in threaded shaft (1/2-20 UNC-2A)
Mounting style	Square flange
Shaft	Threaded

Find the right pump or motor

Enter what is printed on the label of the one you are replacing. Anything that differs is shown with the difference spelled out, so you can judge it for yourself.

Make or modelHorsepowerVoltageSpeedAmpsPort size (pumps)Frame (motors)

Port size is the plumbing thread, not the pipe — a 2 inch union measures about 3 inches across the male thread. Amps are compared to within half an amp, since published figures round differently between motor brands. Voltage is never treated as a near miss: a 115V motor is not one step from a 230V supply. Anything whose page does not publish a figure you entered is left out rather than offered with a caveat — search it by name to see it anyway.

🔧 Parts and fittings for this

Part	Our part number	Availability	Price
Tool, Seal Setting	SS2136	9 in stock	$103.11	Add to cart
Tool, Pool Tool, Armature Holding	128	29 in stock	$32.88	Add to cart
Tool, Pool Tool, Impeller Wrench, Closed	127	13 in stock	$53.79	Add to cart

Brand	Nidec-Motor-Corp/US-Motors
Phase	1 Phase (1ph)
Horsepower	0.75hp
Voltage	115v
Speed	2 Speed (2-Spd)
Motor Type	Pool
Motor Shaft Type	Threaded
Motor Style	Square Flange
Frame Type	56Y
H Part#	35-184-1248

Manufacturer part number	EB981
UPC (GTIN)	786382051495
Warranty	1 year manufacturer warranty
Returns	30-day returns – see our returns policy

Motor, Nidec/US Motor, 0.75hp, 115v, 2-Spd, 56Yfr, SQFL, Full | EB981