Marathon/Protech 51-102826-10 Belt Drive Blower Motor - 10 HP, 208-230-460V, 3-Phase, 1725 RPM
The marathon (Rheem-Ruud) 51-102826-10 is a genuine OEM 10 HP belt-drive blower motor built for large commercial air handling and packaged HVAC equipment. Rated 208-230-460 volts, 3-phase, 50-60 Hz at 1725 RPM single-speed, this heavy-duty replacement motor delivers the airflow horsepower required by big commercial rooftop units, packaged systems, and modular/commercial air handlers that originally shipped with a 10 HP three-phase belt-drive blower motor.
Is the 10 HP 51-102826-10 the Right Motor for Your Unit?
This is a large-frame, three-phase belt-drive blower motor intended for commercial-grade air handling equipment, not residential furnaces or small package units. Residential blower motors are typically fractional-horsepower, single-phase, direct-drive designs; a 10 HP, 208-230-460V, 3-phase motor at this size belongs in commercial applications only.
Because a single motor part number can be used across many pieces of equipment, the correct way to confirm fitment is to match the OEM part number stamped on your existing motor rather than the unit model alone. Verify horsepower (10 HP), voltage (208-230-460V), phase (3-phase), and RPM (1725), then confirm the OEM number 51-102826-10 on the motor nameplate or in your unit's parts breakdown.
Ideal for: OEM replacement in large commercial Rheem, Ruud, and WeatherKing rooftop/packaged units and commercial air handlers that were factory-equipped with a 10 HP, 3-phase, 1725 RPM belt-drive blower motor.
Need a different horsepower or voltage? Browse our full selection of indoor and outdoor fan & blower motors, or let us match the exact OEM motor to your equipment.
Fitment guidance is general. Always confirm the OEM part number, horsepower, voltage, phase, and RPM against your unit's nameplate before ordering. Request free part-matching help, contact Budget Heating, or call 813-885-7999.
Specifications
| Part Number (MPN) | 51-102826-10 |
|---|---|
| Brand | Marathon (Rheem-Ruud OEM) |
| Motor Type | Belt Drive Blower Motor |
| Horsepower | 10 HP |
| Voltage | 208-230-460V |
| Phase | 3-Phase |
| Frequency | 50-60 Hz |
| Speed / RPM | 1 Speed / 1725 RPM |
| Application | Commercial Air Handling / Packaged HVAC Equipment |
| Condition | New / Genuine OEM |
The 51-102826-10 is a direct OEM-specification replacement, engineered to the same electrical and mechanical values as the original factory motor so it drops into the existing belt-drive blower assembly without modification.
Features & Installation Notes
Motor Features
- Genuine ProTech/Marathon (Rheem-Ruud) OEM replacement part
- 10 HP output for high-airflow commercial blower assemblies
- Multi-voltage 208-230-460V wiring flexibility
- 3-phase power for commercial electrical service
- 1725 RPM single-speed operation
- 50-60 Hz rated for domestic and export equipment
- Belt-drive design for use with adjustable blower sheaves
- Built to original factory electrical and mechanical specifications
Before You Install
- Confirm the OEM number and/or motor specifications 51-102826-10 on your motor nameplate
- Verify HP, voltage, phase, and RPM match your application
- Inspect the blower wheel/sheave — worn or unbalanced wheels cause premature motor failure from vibration
- Check and re-tension belts to manufacturer specification
- Confirm correct rotation before final start-up
- Installation by a licensed HVAC technician is required to maintain warranty coverage
Frequently Asked Questions
How do I confirm the 51-102826-10 is the correct motor for my unit?
Match the OEM part number stamped on your existing motor nameplate, then confirm the horsepower (10 HP), voltage (208-230-460V), phase (3-phase), and speed (1725 RPM). A single motor part number is used across many pieces of equipment, so the part number is the most reliable way to verify fitment.
Is the 51-102826-10 a residential or commercial blower motor?
Strictly commercial. At 10 HP, 3-phase, 208-230-460V it is designed for large commercial air handling and packaged equipment. Residential systems use fractional-horsepower single-phase direct-drive motors.
Can this motor run on 208, 230, and 460 volts?
Yes. The 51-102826-10 is rated 208-230-460V and is wired to the appropriate voltage for your commercial electrical service. It is a three-phase motor, so single-phase power is not compatible.
Why is this a belt-drive motor instead of direct-drive?
Large commercial blowers commonly use a belt-drive arrangement with an adjustable sheave so airflow can be fine-tuned to the system. The 51-102826-10 mounts to the blower assembly and drives the wheel through belts and pulleys.
Should I replace anything else when I change this motor?
Inspect the blower wheel and sheave, and check the belts. A worn or unbalanced blower wheel transmits vibration into a new motor and can shorten its life, so replace worn drive components at the same time and re-tension the belts to specification.
Does installation affect the warranty?
Yes. These parts are intended for installation by licensed HVAC technicians only. Installation by anyone other than a licensed technician can void warranty coverage and forfeit technical support.
