AMETEK Lamb 117478 Vacuum Motor for Beam Central Vacuum – Part# 201P

AMETEK Lamb 117478 Vacuum Motor for Beam Central Vacuum – Part# 201P

Available: In Stock
$393.90
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Quick Summary

The 117478 Lamb motor is a brand-new replacement motor for select central vacuum systems and blowers. It fits listed Beam models and replaces the 117549 motor with higher stated airwatts.

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

Quick Highlights

  • Original Lamb Ametek 117478 motor
  • Two fan stages
  • 110–120V, 50–60 Hz
  • 549 AirWatts and 115.8 CFM
  • Replaces motor 117549
  • Carbon motor brushes can be replaced

Product Overview

The 117478 Lamb Ametek motor is used in select SilentMaster, Beam, Electrolux, and Vacuflo central vacuum systems. It may also be marked 7478 or 11-7478, and is compatible with 117478 motors such as the 117478-12.

This brand-new motor installs with three bolts and a couple of wires. The carbon brushes are replaceable, and the motor can replace a 117549 motor when the system and fit are confirmed.


Key Features

  • Replacement motor: Replaces the Lamb 117549 motor and provides 549 AirWatts compared with the 117549 motor’s stated 483 AirWatts.
  • Broad system compatibility: Listed for select SilentMaster, Beam, Electrolux, and Vacuflo systems.
  • Beam model fit: Fits the listed Beam 2875, 310, 387, and 875 models in 120V versions.
  • Two fan stages: The motor has two fan stages for central vacuum applications.
  • Replaceable brushes: Its carbon motor brushes can be replaced before the motor reaches the end of its service life.
  • Straightforward installation: Replacement involves three bolts and a couple of wires.

Beam Compatibility

This part is listed as the match for these Beam central vacuum models:

  • Beam 2875 (120V)
  • Beam 310 (120V)
  • Beam 387 (120V)
  • Beam 875 (120V)

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 part number 117478
Alternate markings 7478 or 11-7478
Compatible motor numbers 117478, including 117478-12
Replacement for 117549
Fan stages 2
Bottom diameter 7.2 inches
Voltage 110–120V
Frequency 50–60 Hz
Height 7-3/4 inches
Bolt height 1-3/4 inches
Waterlift 120 inches
Airflow 115.8 CFM
Airwatts 549
Amps 13.5
Listed Beam models 2875 (120V), 310 (120V), 387 (120V), 875 (120V)
Core trade-in None
Authorized Dealer Ace Vacuums

Best For

  • Replacing a failed 117478 or 117549 central vacuum motor
  • Listed 120V Beam models
  • Select SilentMaster, Electrolux, and Vacuflo systems
  • Systems showing motor failure symptoms such as electrical smell or excessive blue sparks

Not Ideal For

  • Systems that do not match the listed motor or model specifications
  • Installations where the motor’s voltage and physical fit have not been confirmed
  • Replacing a relay when the motor itself is still operating

Why Buy from Ace Vacuums

When you purchase from Ace Vacuums, you receive:

  • Central vacuum parts matched to your Beam 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 117478 Vacuum Motor for Beam 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

The 117478 Lamb motor is a brand-new replacement motor for select central vacuum systems and blowers. It fits listed Beam models and replaces the 117549 motor with higher stated airwatts.

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

Quick Highlights

  • Original Lamb Ametek 117478 motor
  • Two fan stages
  • 110–120V, 50–60 Hz
  • 549 AirWatts and 115.8 CFM
  • Replaces motor 117549
  • Carbon motor brushes can be replaced

Product Overview

The 117478 Lamb Ametek motor is used in select SilentMaster, Beam, Electrolux, and Vacuflo central vacuum systems. It may also be marked 7478 or 11-7478, and is compatible with 117478 motors such as the 117478-12.

This brand-new motor installs with three bolts and a couple of wires. The carbon brushes are replaceable, and the motor can replace a 117549 motor when the system and fit are confirmed.


Key Features

  • Replacement motor: Replaces the Lamb 117549 motor and provides 549 AirWatts compared with the 117549 motor’s stated 483 AirWatts.
  • Broad system compatibility: Listed for select SilentMaster, Beam, Electrolux, and Vacuflo systems.
  • Beam model fit: Fits the listed Beam 2875, 310, 387, and 875 models in 120V versions.
  • Two fan stages: The motor has two fan stages for central vacuum applications.
  • Replaceable brushes: Its carbon motor brushes can be replaced before the motor reaches the end of its service life.
  • Straightforward installation: Replacement involves three bolts and a couple of wires.

Beam Compatibility

This part is listed as the match for these Beam central vacuum models:

  • Beam 2875 (120V)
  • Beam 310 (120V)
  • Beam 387 (120V)
  • Beam 875 (120V)

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 part number 117478
Alternate markings 7478 or 11-7478
Compatible motor numbers 117478, including 117478-12
Replacement for 117549
Fan stages 2
Bottom diameter 7.2 inches
Voltage 110–120V
Frequency 50–60 Hz
Height 7-3/4 inches
Bolt height 1-3/4 inches
Waterlift 120 inches
Airflow 115.8 CFM
Airwatts 549
Amps 13.5
Listed Beam models 2875 (120V), 310 (120V), 387 (120V), 875 (120V)
Core trade-in None
Authorized Dealer Ace Vacuums

Best For

  • Replacing a failed 117478 or 117549 central vacuum motor
  • Listed 120V Beam models
  • Select SilentMaster, Electrolux, and Vacuflo systems
  • Systems showing motor failure symptoms such as electrical smell or excessive blue sparks

Not Ideal For

  • Systems that do not match the listed motor or model specifications
  • Installations where the motor’s voltage and physical fit have not been confirmed
  • Replacing a relay when the motor itself is still operating

Why Buy from Ace Vacuums

When you purchase from Ace Vacuums, you receive:

  • Central vacuum parts matched to your Beam 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 117478 Vacuum Motor for Beam 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

Which Beam models does this motor fit?

The record lists Beam 2875, 310, 387, and 875 models, all in 120V versions. Confirm your model before ordering.

Is this a genuine Beam motor?

No. This is an AMETEK Lamb motor listed for use with select Beam central vacuum systems.

What motors does the 117478 replace?

The 117478 can replace motor 117549 and is also compatible with 117478 motors, including 117478-12.

What are the motor’s electrical specifications?

The motor is rated for 110–120V, 50–60 Hz, and 13.5 amps.

How do I know if my motor may need replacement?

Possible signs include a popping mini breaker, electrical smell, excessive blue sparks from the motor top, hearing only a click, or a motor that shuts down and later works again.

Can the motor brushes be replaced?

Yes. The Lamb 117478 has carbon motor brushes that can be replaced, and two brushes are needed for a brush replacement.

Is installation difficult?

The record describes installation as involving three bolts and a couple of wires. Follow the appropriate replacement instructions for your system.

Does this motor fit every Beam central vacuum?

No fit is universal. Confirm your Beam model or inlet and compare the motor specifications before ordering, especially if your system is not one of the listed models.

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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