AMETEK Lamb 117157 Vacuum Motor for MD Central Vacuum – Part# 207X

AMETEK Lamb 117157 Vacuum Motor for MD Central Vacuum – Part# 207X

Available: In Stock
$386.27
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Quick Summary

This replacement vacuum motor is the Lamb 117157 model in a 220-240 volt configuration. It is used in some central vacuum brands and is listed for select MD central vacuum power units.

Available from Ace Vacuums, with help matching parts to your MD central vacuum system at our Fairfax and Leesburg, VA showrooms.

Quick Highlights

  • Lamb 117157 vacuum motor
  • 220-240 volt, 50-60 hertz
  • 2 fan stages
  • Fits MD B (240V) and MD SV (240V)
  • Part number 207X
  • Original Lamb Ametek motor

Product Overview

The 117157 vacuum motor is a brand new Lamb Ametek original motor, not a rebuilt unit. It is used in some central vacuum brands and models and is listed here for select MD central vacuum systems.

This motor is listed for MD B (240V) and MD SV (240V) power units. It may also be identified as 11-7157 or 7157, and it only replaces the 117157 motor.

Replacement is described as a straightforward job with three bolts and a couple of wires. The motor brushes can also be replaced separately, and two brushes are required if servicing the brushes.


Key Features

  • Original replacement motor: This is a Lamb Ametek original 117157 motor and is sold as a brand new motor, not a rebuilt one.
  • 220-240 volt operation: The motor is rated for 220-240 volts and 50-60 hertz.
  • Two-stage design: This motor has 2 fan stages as listed in the product specifications.
  • MD model fit: It is listed for MD B (240V) and MD SV (240V) central vacuum power units.
  • Direct 117157 replacement: This motor only replaces the 117157 motor.
  • Serviceable brushes: The carbon motor brushes can be replaced, and two brushes are needed.

MD Compatibility

This part is listed as the match for these MD central vacuum power units:

  • MD B (240V)
  • MD SV (240V)

Check the model number on your power unit label before ordering. Our team can confirm the match if you are unsure.


Technical Specifications

Specification Details
Brand AMETEK Lamb
Motor Model 117157
Part Number 207X
Voltage 220-240 volt
Hertz 50-60
Fan Stages 2
Bottom Diameter 7.2 in
Height 7.75 in
Bolt Height 1.5 in
Waterlift 122 in
CFM 104.9
AirWatts 437
Amps 5.8
Fits MD Models MD B (240V), MD SV (240V)
Compatibility Note AirMaster, Modern Day and Flo-Master
Also Marked As 11-7157 or 7157
Authorized Dealer Ace Vacuums

Best For

  • Replacing a worn or failed 117157 motor
  • MD central vacuum models MD B (240V) and MD SV (240V)
  • 220-240 volt central vacuum applications
  • Shoppers who want a new original Lamb Ametek motor

Not Ideal For

  • Not for replacing motors other than 117157
  • Not for buyers who have not confirmed 220-240 volt requirements
  • Mini breaker or relay issues may need separate diagnosis or parts

Why Buy from Ace Vacuums

When you purchase from Ace Vacuums, you receive:

  • Central vacuum parts matched to your MD system
  • Help choosing the right hose, tools and inlet parts
  • Knowledgeable support before and after the sale
  • Shipping or pickup at our Fairfax and Leesburg showrooms

Available Online & In-Store

The AMETEK Lamb 117157 Vacuum Motor for MD Central Vacuum is available online and in-store through Ace Vacuums.

Visit Our Showrooms

  • Fairfax, VA: 11110 Main St, Fairfax, VA 22030
  • Leesburg, VA: 300 Fort Evans Rd NE, Leesburg, VA 20176

Call 703-997-9292 (ext. 1 Fairfax, ext. 2 Leesburg).


Quick Summary

This replacement vacuum motor is the Lamb 117157 model in a 220-240 volt configuration. It is used in some central vacuum brands and is listed for select MD central vacuum power units.

Available from Ace Vacuums, with help matching parts to your MD central vacuum system at our Fairfax and Leesburg, VA showrooms.

Quick Highlights

  • Lamb 117157 vacuum motor
  • 220-240 volt, 50-60 hertz
  • 2 fan stages
  • Fits MD B (240V) and MD SV (240V)
  • Part number 207X
  • Original Lamb Ametek motor

Product Overview

The 117157 vacuum motor is a brand new Lamb Ametek original motor, not a rebuilt unit. It is used in some central vacuum brands and models and is listed here for select MD central vacuum systems.

This motor is listed for MD B (240V) and MD SV (240V) power units. It may also be identified as 11-7157 or 7157, and it only replaces the 117157 motor.

Replacement is described as a straightforward job with three bolts and a couple of wires. The motor brushes can also be replaced separately, and two brushes are required if servicing the brushes.


Key Features

  • Original replacement motor: This is a Lamb Ametek original 117157 motor and is sold as a brand new motor, not a rebuilt one.
  • 220-240 volt operation: The motor is rated for 220-240 volts and 50-60 hertz.
  • Two-stage design: This motor has 2 fan stages as listed in the product specifications.
  • MD model fit: It is listed for MD B (240V) and MD SV (240V) central vacuum power units.
  • Direct 117157 replacement: This motor only replaces the 117157 motor.
  • Serviceable brushes: The carbon motor brushes can be replaced, and two brushes are needed.

MD Compatibility

This part is listed as the match for these MD central vacuum power units:

  • MD B (240V)
  • MD SV (240V)

Check the model number on your power unit label before ordering. Our team can confirm the match if you are unsure.


Technical Specifications

Specification Details
Brand AMETEK Lamb
Motor Model 117157
Part Number 207X
Voltage 220-240 volt
Hertz 50-60
Fan Stages 2
Bottom Diameter 7.2 in
Height 7.75 in
Bolt Height 1.5 in
Waterlift 122 in
CFM 104.9
AirWatts 437
Amps 5.8
Fits MD Models MD B (240V), MD SV (240V)
Compatibility Note AirMaster, Modern Day and Flo-Master
Also Marked As 11-7157 or 7157
Authorized Dealer Ace Vacuums

Best For

  • Replacing a worn or failed 117157 motor
  • MD central vacuum models MD B (240V) and MD SV (240V)
  • 220-240 volt central vacuum applications
  • Shoppers who want a new original Lamb Ametek motor

Not Ideal For

  • Not for replacing motors other than 117157
  • Not for buyers who have not confirmed 220-240 volt requirements
  • Mini breaker or relay issues may need separate diagnosis or parts

Why Buy from Ace Vacuums

When you purchase from Ace Vacuums, you receive:

  • Central vacuum parts matched to your MD system
  • Help choosing the right hose, tools and inlet parts
  • Knowledgeable support before and after the sale
  • Shipping or pickup at our Fairfax and Leesburg showrooms

Available Online & In-Store

The AMETEK Lamb 117157 Vacuum Motor for MD Central Vacuum is available online and in-store through Ace Vacuums.

Visit Our Showrooms

  • Fairfax, VA: 11110 Main St, Fairfax, VA 22030
  • Leesburg, VA: 300 Fort Evans Rd NE, Leesburg, VA 20176

Call 703-997-9292 (ext. 1 Fairfax, ext. 2 Leesburg).


Frequently Asked Questions

Will this fit my MD central vacuum?

This motor is listed for MD B (240V) and MD SV (240V). If you are not sure about your exact MD central vacuum model, confirm the model before ordering.

Is this a rebuilt motor?

No. This is a brand new Lamb Ametek original motor, not a rebuilt motor.

What motor does this replace?

It only replaces the 117157 motor.

Are there other numbers I might see on this motor?

Yes. The 117157 motor may also say 11-7157 or 7157.

What are the electrical specs for this motor?

It is rated for 220-240 volts and 50-60 hertz, with 5.8 amps.

What are common signs that the motor needs replacement?

Signs listed include a mini breaker popping, electrical smell, excessive blue sparks from the motor top, only hearing a click, the motor shutting down on its own but working later, or the motor reaching its 900-1,200 hour life.

Can the brushes be replaced instead of the whole motor?

Yes. The carbon motor brushes can be replaced, and you will need to buy two brushes.

Is replacing this motor difficult?

The description says it is not difficult to replace. It uses three bolts and a couple of wires.

Visit Our Showrooms

Check real-time traffic and travel time from your location in VA, DC, or MD.

📍 AceVacuums Fairfax (DMV Hub)

Address: 11110 Main St, Fairfax, VA 22030
Landmark: Opposite Havertys Furniture Store
Best for: Bethesda, Potomac, Arlington, NW Washington D.C.

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📍 AceVacuums Leesburg

Address: 300 Fort Evans Rd NE, Suite 104, Leesburg, VA 20176
Landmark: Next to Home Depot in Leesburg
Best for: Ashburn, Sterling, Frederick MD, Loudoun County

Get Real-Time Traffic & Directions

Shipping, Return & Refund Policy

Shipping Policy

In-stock merchandise generally ships from our Leesburg, Virginia location within 3–5 business days. Processing time is separate from carrier transit time and is not a guaranteed delivery date. Weekends and holidays can affect timing. Special-order, backordered or unavailable items may take longer; contact us to confirm timing before purchase when a deadline matters.

Shipping options and charges are shown at checkout. After dispatch, follow the carrier's tracking updates. Weather, carrier delays, order verification and inventory confirmation may affect delivery. Inspect packages promptly and retain packaging if there is damage or an incorrect or missing item.

Returns and refunds

Eligible unused items have a 30-calendar-day return request window for refunds or exchanges, measured from delivery or in-store purchase. Return authorization is required. Final-sale exclusions, the 15% restocking fee for change-of-mind returns and shipping responsibilities are explained in our Return and Refund Policy. That policy is the governing source for return eligibility and fees.

For shipping or return help, email sales@acevacuums.com or call 703-997-9292.


30-Day Returns, Refunds and Exchanges

Updated September 27, 2026. Request a return for an eligible unused item within 30 calendar days of delivery (or purchase for items collected in store). Eligible returns may be refunded to the original payment method or exchanged, subject to availability. The same 30-day request window applies to both refunds and exchanges; there is no separate seven-day or 15-day refund deadline.

Eligibility and authorization

Items must be unused, clean, complete and in their original packaging with all accessories, manuals and proof of purchase. Contact sales@acevacuums.com or 703-997-9292 before sending anything back. Include your order number, item and reason for return. We will confirm eligibility, charges and return instructions. Unapproved or cash-on-delivery returns are not accepted.

Fees and shipping

For an approved change-of-mind return, a 15% restocking fee applies to the returned merchandise price. Original shipping charges are not refundable and the customer pays return shipping. These charges do not apply to an approved return caused by our shipping error or a damaged/defective item claim. Contact us first so we can arrange the appropriate remedy and shipping instructions. Do not assume a prepaid label is included.

Final-sale and excluded items

Air purifiers; discounted, clearance, trade-in, holiday-sale and price-matched purchases; gift cards; custom or special-order products; electrical parts; used or installed items; opened cleaning solutions; and used bags, filters, belts or other consumables are not eligible for change-of-mind returns. Other items clearly marked final sale at purchase are also excluded. An opened box alone does not disqualify an otherwise eligible unused, complete item, but consumables and cleaning solutions must remain unopened.

Damaged, defective, incorrect or missing items; recalls

Inspect your order promptly and contact us as soon as you discover a problem, with your order number and photos where helpful. Keep the packaging. Change-of-mind exclusions and deadlines do not remove applicable defect, warranty, recall or statutory rights. Warranty coverage requires evaluation under the manufacturer's terms; dealer status does not guarantee free repair. Recalled products must follow the manufacturer's recall process.

Refund timing and exchanges

After we receive and inspect the return, we will notify you of approval or the reason it cannot be accepted. Approved refunds are issued to the original payment method within 10 business days of approval; your bank may take additional time to post them. Contact us if more than 15 business days have passed since approval. Exchanges require authorization and replacement availability; any price difference and applicable charges will be explained before processing.

Applicable rights and earlier purchases

This policy applies to online and in-store purchases. We will honor more favorable written return terms provided with an earlier purchase. Applicable consumer rights remain unaffected. Where the European Union 14-day cancellation right applies, customers may cancel or return eligible orders within 14 days of receipt, subject to applicable legal exceptions, without giving a reason.


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For 25+ years, Ace Vacuums has filled the gap left by big-box retailers. We provide the expert repairs, warranty support, and genuine OEM parts that Amazon and Walmart simply don't offer. From free estimates to same-day service, we are your local alternative for professional home care solutions.

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