117939 Lamb Vacuum Motor

Product Details

Our brand new (not rebuilt) Lamb Ametek 117939 Motor is used in some central vacuum brands and models. 117939 motor is a Lamb Ametek original motor.

  • Fan Stages - 3
  • Bottom Diameter - 5.7"
  • Voltage - 110-120
  • Hertz - 50-60
  • Height - 8"
  • Bolt Height -3-1/2"
  • Waterlift -138.6"
  • CFM - 101.2
  • AirWatts - 458
  • Amps - 13.6
What to note: The 117939 vacuum motor may say 7939 or 11-7939.

What motors it replaces: Only replaces 117939 motor.

When to replace: The signs that a 117939 Lamb motor needs to be replaced include: mini breaker popping, electrical smell, excessive blue sparks seen from motor top, you only hear a click, motor shuts down on its own but works later, or its life of 900-1,200 hours has been used up. (If you don't hear a click, then your relay most likely needs to be replaced and your motor may be fine). Five percent of the time, the mini breaker will go bad as well as the motor. If this happens, replace the motor and then evaluate the mini breaker.

How to replace: It is not difficult to replace the 117939 Ametek Motor. There are three to four screw brackets and a couple of wires. All of our customers are amazed at how easy it is. NOTE: There is no core trade-in. Used motors are thrown away or taken to a metal recycling center. Click here to read and print out our step-by-step motor replacement instructions. Note that if the unit bolts into metal brackets, then the ground wire can be snipped. If plastic, then attach the ground wire to the ground from the power cord or anywhere to metal on the unit.

Replacing motor brushes: The Lamb 117939 vacuum motor has carbon motor brushes that can be replaced. This should be done before a motor is "on its last legs." Read more about changing the motor brush on the detailed motor brush how-to page. If you are ready to replace your motor brushes, here is a link to the Ametek 117939 Motor Brush. You will need to buy two.
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Compatible with many popular brands

This includes: and.

Also compatible with:

  • S

    • SilentMaster

Note: This product may be incompatible with brands not listed. Please call our Customer Care Team at (800) 997-2278 for assistance.

Part #199R
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Latest Top Reviews

5 Stars
Dec 7 2019 9:36AM
My Stealth, in-home vac has received various parts over the last 19 years. Finally the motor died. The new motor (and gasket) work just fine now. Thank you!

5 Stars
Mar 4 2019 6:33AM
It sucks!!

5 Stars

Jan 30 2019 5:31AM
MD came thru when no one else could. Two other suppliers said they had the motors in stock, but that proved not to be the case. Within 5 days of my order, MD had my motors on hand.

5 Stars
Dec 26 2018 12:27PM
This is the second time we've replaced one of the two motors in our two-motor central vac. We've been using it a lot (5,000+sq. ft.) since 1995, so it's been very nice to have a dependable appliance.

5 Stars

Oct 6 2017 8:06AM
Received the 2 motors promptly and I installed them in less than 30 minutes.

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