Which Hayward Pumps Fit the SPX1607Z1M Maxrate Motor?

Quick answer: the Hayward SPX1607Z1M is a genuine 1 HP, 56J square flange replacement motor made for select Hayward single speed pumps, most commonly the 1 HP Super Pump and Max-Flo families. If your current motor is a 1 HP, 56J frame unit with a threaded shaft, this is very likely your match.

We sell a lot of these, and the same questions come up every time. Will it fit my pump? Do I need the 3/4 HP or the 1 HP version? Is a motor swap even worth it? Let's walk through all of it so you can order once and be done.

What is the SPX1607Z1M, exactly?

The SPX1607Z1M is Hayward's Maxrate replacement motor rated at 1 HP. It's not a complete pump. It's just the motor, the part with the electrical guts that spins the impeller. Everything else on your pump (the strainer housing, the diffuser, the impeller, the seal plate) stays put.

That's the whole appeal. When a motor dies but the wet end of the pump is still in good shape, swapping in an SPX1607Z1M costs a lot less than buying a whole new pump.

Which Hayward pumps is the SPX1607Z1M compatible with?

It fits select Hayward pumps that use a 1 HP, 56J frame motor with a threaded shaft, which covers popular 1 HP models in the Super Pump and Max-Flo lines. The safest way to confirm fit is to check the label on your existing motor.

Here's what to verify before ordering:

• Horsepower. The label should say 1 HP. Match it exactly. Going up or down in HP without changing the impeller causes problems.
• Frame. Look for 56J on the label. The frame determines how the motor bolts to the pump and how the shaft engages the impeller.
• Shaft type. The SPX1607Z1M uses a threaded shaft. If your impeller threads directly onto the motor shaft, you're in the right place.
• Voltage. Check whether your pump is wired for 115V or 230V and make sure your new motor supports your setup.

If the old label is faded or missing, snap a photo of the motor and the pump body and send it to us. We match motors to pumps all day and can usually identify yours in a couple minutes.

How do I know my motor is the problem and not the pump?

A motor that hums but won't turn on, trips the breaker, or grinds and screeches is usually the culprit. The wet end rarely kills a pump on its own.

Common signs your motor is done:

• The pump hums loudly but the shaft won't spin (often failed bearings or a bad start capacitor)
• The breaker keeps tripping the moment the pump starts
• A burning smell or visible scorching near the back of the motor
• Loud grinding or squealing that gets worse over time

One caveat: a bad capacitor can mimic a dead motor and it's a much cheaper fix. If your motor hums and won't start, it's worth testing the capacitor first. If the motor has been screeching for weeks or smells burnt, skip the capacitor and replace the motor.

SPX1607Z1M vs. SPX1605Z1M: which one do you need?

Simple rule: match the horsepower on your old motor's label. The SPX1607Z1M is the 1 HP version, and the SPX1605Z1M is the 3/4 HP version. They're both 56J frame Maxrate motors, so the mounting is the same, but they are not interchangeable on the same pump.

Your impeller was sized for a specific horsepower. Put a bigger motor behind a smaller impeller (or the reverse) and you'll get poor flow, overheating, or an overloaded motor. Stick with what you have.

What's the replacement cost, and what else should you buy?

The SPX1607Z1M runs $389.00, which is well under the price of a complete new pump. But don't install a new motor with old seals.

Any time the motor comes off, replace the shaft seal and the gaskets. They're cheap, and a worn shaft seal is the number one reason a fresh motor fails early. Water sneaks past the old seal, drips into the new motor, and ruins it. A go-kit with the seal and gaskets adds a few dollars and saves you from doing the whole job twice.

Bottom line

If your Hayward pump has a 1 HP, 56J frame motor with a threaded shaft and the wet end is still solid, the SPX1607Z1M Maxrate motor is the straightforward fix. Confirm the HP, frame, and voltage off your old label, grab a seal kit with it, and your pump should be back to normal in an afternoon.

Hayward | SPX1607Z1M | Maxrate 56J Replacement Motor, 1 HP, For Select Hayward Pumps

$389.00

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