Wuzeautk Universal SM550 Bathroom Exhaust Fan Motor Replacement Kit — 120V, 3000 RPM, 50 CFM; Replaces 65100, VFM100, EM550, EM750

Upgrade your bathroom vent with the Wuzeautk SM550 replacement kit

The SM550 kit combines a durable motor and paddle-style fan designed to replace a wide range of 50 CFM bathroom exhaust fans. Built for 120V operation and a top speed around 3000 RPM, it aims to restore steady airflow and reliable operation in older or noisy units.

Compatibility and versatility

Engineered to work with many common brands and models, this replacement covers Nu-Tone 65100 and other era fans, along with Uppco, Ventorola E498-1, VFM100 AC-65878Bay Motors, Sears 569, and similar 50 CFM units. The motor supports both CW and CCW rotation, adding flexibility for installation in tighter cabinets or retrofit projects.

• Replaces: 65100, VFM100, C65878, EM550, EM750, 33-100, 82423K, and many more
• Designed for nearly all 50 CFM bathroom exhaust fans

Technical snapshot

• Voltage and speed: 120V, 60Hz, up to about 3000 RPM
• Current draw: approximately 0.65 amps
• Airflow class: around 50 CFM (varies by ducting and housing)
• Shaft: 3/16 inch x 1 3/4 inch
• Lead length: 6 inches; plug: 2-prong
• Mounting: 1 7/8 inch on-center studs; coil stack: 5/8

What’s included

• 1 x SM550 replacement motor
• 1 x 4.5-inch paddle-style fan

Installation tips and expected performance

For best results, ensure the power is off before handling wiring. Check the fan housing for debris and confirm compatibility with your mounting pattern. If you hear startup vibrations or notice unusual noise, this kit may offer a smoother, more consistent operation compared with an aging motor.

Note: Always use gloves when handling electrical components and follow local electrical codes.

Practical benefits and considerations

While not a guarantee, upgrading to the SM550 can contribute to steadier airflow, reduced wear on your existing ductwork, and a possibly quieter experience compared with older fans. The reversible rotation and broad compatibility make it a versatile option for DIY repairs and professional service projects.