1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the Rotary 13248 PTO Switch. This switch is a genuine Rotary replacement part designed to replace Scag part number 483957. It is rated for 10 Amps and is crucial for controlling the Power Take-Off (PTO) function in compatible lawn mowers and outdoor power equipment.
Please read this manual thoroughly before installation and use to ensure safe and effective operation.
2. Safety Information
Always observe the following safety precautions when handling and installing electrical components:
- Disconnect Power: Before attempting any installation or maintenance, ensure the equipment's power source (e.g., battery) is disconnected to prevent electrical shock or accidental startup.
- Qualified Personnel: Installation should ideally be performed by a qualified technician or individuals familiar with electrical systems and equipment maintenance.
- Proper Tools: Use appropriate tools for installation to avoid damage to the switch or surrounding components.
- Compatibility: Verify that this switch is the correct replacement part for your specific equipment model by consulting your equipment's owner's manual.
- No Returns: Please note that this item cannot be returned once purchased. Ensure compatibility before opening the package.
3. Product Specifications
| Feature | Detail |
|---|---|
| Model Number | 13248 |
| Replaces OEM Part | Scag 483957 |
| Brand | Rotary |
| Current Rating | 10 Amps |
| Operation Mode | Manual |
| Switch Type | Rotary |
| Number of Positions | 2 |
| Contact Type | Normally Open |
| Connector Type | Multiple Blade Terminals (Note: Product data listed "2 Pin", but physical switch has multiple blade terminals for wiring harness connection.) |
| Terminal Type | Blade Terminals (Note: Product data listed "Screw", but physical switch uses blade terminals for wiring harness.) |
| Mounting Type | Flush Mount |
| Material | Copper, Brass, Silver (Contact Material) |
| Approx. Dimensions (L x W x H) | 6 x 5 x 1 inches (Note: These are approximate packaging dimensions, not the switch itself.) |
| Approx. Item Weight | 0.06 Pounds (Note: This is approximate packaging weight.) |
4. Setup & Installation
Proper installation is critical for the safe and correct function of your equipment. Always consult your equipment's owner's manual for specific instructions and wiring diagrams related to your model. Please refer to the list for compatibility with your specific equipment.
- Prepare Equipment: Ensure the equipment is turned off, the engine is cool, and the spark plug wire (or battery terminals) is disconnected to prevent accidental starting.
- Locate Existing Switch: Identify the current PTO switch on your equipment's control panel.
- Remove Old Switch: Carefully disconnect the wiring harness from the old switch. Note the position of each wire on the terminals. It is recommended to take a photograph before disconnecting. Remove any retaining clips or nuts holding the old switch in place.
- Install New Switch: Insert the Rotary 13248 switch into the control panel opening. This is a flush mount switch, designed to snap into place. You may need to apply firm, even pressure to seat it correctly.
- Connect Wiring: Reconnect the wiring harness to the new switch's terminals. Refer to your photograph or the equipment's wiring diagram to ensure correct connections. The switch features multiple blade terminals, often labeled "COM" for common, and letters like A, B, C for specific circuits. Ensure each wire is securely attached.
- Secure Switch: Ensure the switch is firmly seated and secured in the control panel.
- Test Functionality: Reconnect the spark plug wire or battery. Test the PTO switch functionality in a safe environment, ensuring the blades engage and disengage as expected.

Image 1: Rotary 13248 PTO Switch. This image shows the switch with its yellow rotary knob and the multiple blade terminals at the rear, labeled 'COM', 'C', 'B', 'A'. These terminals are where the wiring harness connects to control the PTO function.
Note: The color of the knob may vary (e.g., black instead of yellow) but does not affect the switch's functionality or specifications.
5. Operation
The Rotary 13248 PTO Switch is a manual, 2-position rotary switch designed for engaging and disengaging the Power Take-Off (PTO) on compatible equipment, such as lawn mowers.
- Engaging PTO: To engage the PTO (e.g., to start mower blades), rotate the switch knob to the "ON" or "ENGAGE" position. The exact labeling or indicator will depend on your equipment's control panel.
- Disengaging PTO: To disengage the PTO (e.g., to stop mower blades), rotate the switch knob back to the "OFF" or "DISENGAGE" position.
- Safety Interlocks: Always ensure that all safety interlocks on your equipment (e.g., seat switch, brake engaged) are satisfied before attempting to engage the PTO. The switch will not function if safety conditions are not met.
6. Maintenance
The Rotary 13248 PTO Switch is a sealed unit and generally requires minimal maintenance. However, periodic inspection can help ensure its longevity and reliable operation:
- Visual Inspection: Periodically inspect the switch for any signs of physical damage, corrosion on terminals, or loose connections.
- Cleanliness: Keep the area around the switch clean and free from dirt, debris, and moisture, which can interfere with its operation or cause corrosion.
- Terminal Integrity: Ensure that the wiring harness connections to the switch terminals remain tight and free of corrosion.
- Replacement: If the switch exhibits intermittent operation, difficulty engaging/disengaging, or visible damage, it should be replaced.
7. Troubleshooting
If you experience issues with your PTO system after installing the Rotary 13248 switch, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| PTO does not engage |
|
|
| Intermittent PTO engagement |
|
|
| Switch knob feels loose or sticky |
|
|
Always refer to your equipment's specific service manual for detailed diagnostic procedures.
8. Warranty & Support
This product is a genuine Rotary replacement part. For specific warranty information, please refer to the documentation provided with your purchase or contact the retailer. As a replacement component, its warranty may be subject to the terms and conditions of the original equipment manufacturer or the retailer.
For technical support or further inquiries, please contact the point of purchase or the manufacturer, Rotary.



