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I have a century lasar spa motor 177803, I bought it to put into my small hot tub, what heater/controls are compatiable with this pump?

I am looking to put a 115 system into my tub. I don't have the money to wire 220 to my tub. I have 220 heater & pump that should work... but it would be at least $600 to get it wired. I have and old 115 pump/heater combo but the bearings seemed to have seized. Any help?

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  • rayrezek
    rayrezek Oct 26, 2012

    Okay, I found a Century Lasar pool/spa 177803, I can get it for $50, but where do I find a heater that is compatiable with it?



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If you are looking for a stand alone heater here are a few options:
Brett Aqualine HT-1
Therm Products 5.5kW
The above heaters only have Thermostat's for temperature control. They also include hi limit & pressure switches, those two are safety devices to prevent an over heat.
A Hydro-Quip CS500 system, can plug into a regular outlet. It also comes with a time clock & air buttons to allow motor control.

Posted on Oct 30, 2012


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Posted on Jan 02, 2017

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SOURCE: We have a AO Smith

Here is a replacement motor:
You might have to sign up for shipment, but it looks like they have them.
Good luck, and hope this gets you going again.

Posted on Sep 12, 2010

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How to replace seal on century lasar spa motor

split the motor from the wet end then take off the cover to the impeller remove screw for impeller backwards thread might have to hold the shaft on the back of the motor then unscrew the impeller regular threads separate the motor from the backing plate replace seals then reverse process

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A Century pool spa motor part # 7/177803/02. I have a black, white, red wires. Can someone please tell me how to hook it up to the motor. than you very much

Is this a two speed motor?
motor for a spa pump?
or, are you trying to hook up a capacitor to the motor?
your question is very vague!
if you have a pump connection cord, with the colors you mentioned, did you purposely leave out the fact that there is a Green wire as well?
please be more specific as to the assistance you are seeking.
but if we're intending us to play a guessing game... then if had those colors PLUS a green wire, that would be power supply wires for a TWO speed pump motor, commonly found on SPA pumps.
  • Green will always be Ground.
  • White is your Common Hot LINE WIRE #1
  • Black will be a SWITCHING/TOGGLE Hot LINE WIRE #2
    • Most Commonly a HIGH Speed
  • Red will be a SWITCHING/TOGGLE Hot LINE WIRE #2
    • Most Commonly a LOW SPEED
There will be a decal on the side of the motor telling you which post will be what. If not, the wire up posts will have a letter designations right next to them...
C for Common
H for High
L for Low
green wire will go right onto motor

Aug 25, 2013 | Pool & Spa

1 Answer

I have century lasar pool/spa motor bn50 115volts 16.4/4.4amps 1.5hp 2spd runs on lowspeed but will not run on high speed can it be repaired or what?

I'd start by checking the relay that controls the motor first. Put a meter on it and verify that the high speed terminal is getting voltage. If not, it is the relay or something other than the motor. If the high speed terminal is getting voltage but not kicking on, a fix is possible, but you may want to weigh that against the price of a new motor.

Aug 16, 2013 | AO Smith A O Smith Motors Century 1hp 115v...

1 Answer


Water heater can be added to any incoming water line, either on hot or cold.
Under-counter water heater located near tub will supply hot water just like ordinary household water heater. But it will not reheat water that circulates inside the spa tub.
Otherwise, a spa heater is made with electric element that can work with 120V or 240V. Water from tub circulates through tank that holds element. Element must be fully immersed in water.
To retrofit spa tub with this heater would require cutting water line near pump, running both ends of water line into tank with element.
Then of course you would need to retrofit adjustable thermostat to control when element is on. And integrate element operation into air control switch at tub that can override thermostat so element is not heating when tub is not in use.
Unless there is a pre-packaged kit to retrofit heater, I think adding heater would be difficult.

Jun 05, 2013 | Maax Crescendo - 100085-000 Bathtub

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My pool motor does not turn when I turn it on it just makes a humming sound. Can it be fixed ? Century LASAR Pool/Spa motor model # SD-20-2N11CD

Probably the capacitor is bad.
It can be replaced.
Do not let motor hum, because motor is getting hot and will burn up pretty quick, or trip the reset.
Call pool company.
Motor resources:

Apr 18, 2013 | Pool & Spa

1 Answer

Motor will not come on. flashing OH on tub display dial. Dream maker Model #8003 x 400 series 86L Just purchased used spa and have no manual or directions. thanks

OH stands for Over Heat situation.
If the motor is not working at all, you are getting the OH code because of that. The OH happens when there is not enough circulation in the hot tub which causes the water near the heater to overheat the sensor located in that area. It sounds like either the pump has failed, the wiring has shorted to the motor, or the control board is not telling the pump to come on.
Its probably a bad motor since the heater is obviously activating, which it wouldnt if the pumps motor was getting no power. Replace motor and all should be well again.

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Installing a replacement pool pump and motor

there is a green screw and two other screws. green is ground and the others two are universal, it's not like a DC motor.

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How long does it take to heat the tub

Make sure that the inline heater has power. It should not take very long to heat since your putting hot water into it anyway. The heater is to keep water warm.

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