1. Introduction
This instruction manual provides essential information for the proper installation, maintenance, and troubleshooting of your Scag Genuine OEM V-Belt. This V-belt is specifically designed for Scag SW, SWM, and SWZ series mowers equipped with 52-inch, 61-inch, and 72-inch decks. Adhering to these instructions will help ensure optimal performance and longevity of the belt.
2. Safety Information
- Always turn off the engine and remove the spark plug wire before performing any maintenance or installation on your mower.
- Wear appropriate personal protective equipment, including gloves and eye protection, when handling parts or working on machinery.
- Ensure the mower is on a stable, level surface and cannot move unexpectedly.
- Refer to your specific Scag mower's owner's manual for detailed safety procedures and instructions related to deck removal and belt replacement.
- Keep hands and clothing clear of moving parts.
3. Product Overview
The Scag Genuine OEM V-Belt (Part Numbers 483518, 265-876) is a critical component for transmitting power within your mower's deck system. It is engineered to meet Scag's specifications for durability and performance.

This image displays the Scag Genuine OEM V-Belt, part number 483518, coiled. The belt is black with white text indicating 'SCAG 483518 EB' and 'MADE IN MEXICO'. This V-belt is designed for power transmission in specific Scag mower deck applications.

A top-down view of the Scag Genuine OEM V-Belt, showing its circular form when coiled. This perspective highlights the uniform width and construction of the belt, essential for consistent power transfer.
4. Specifications
| Specification | Detail |
|---|---|
| Part Numbers | Scag: 483518, 265-876 (Replaces OEM: 48286, 483518) |
| Belt Application | Deck |
| Belt Type | Covered V-Belt |
| Width | 5/8 inches (0.63 inches) |
| Length | 92 5/8 inches (92.63 inches) |
| Compatible Scag Models | SW, SWM, SWZ series with 52", 61", and 72" decks |
| Item Weight | 2 pounds |
5. Installation Instructions
Replacing a V-belt on a mower deck requires careful attention to detail. Always consult your specific Scag mower's owner's manual for precise, model-specific instructions and diagrams. The following are general steps:
- Preparation: Ensure the mower engine is off, cool, and the spark plug wire is disconnected to prevent accidental starting. Place the mower on a flat, stable surface.
- Access the Deck: Depending on your mower model, you may need to remove the mower deck from the tractor or lift the mower to access the belt system. Follow your mower's manual for deck removal or access procedures.
- Remove Old Belt: Carefully observe the routing of the old belt around all pulleys (engine, idler, spindle pulleys). Take photos or draw a diagram if necessary. Release any tensioning mechanisms (e.g., idler pulley spring) and remove the worn belt.
- Inspect Pulleys: While the belt is off, inspect all pulleys for wear, damage, or debris. Clean any accumulated grass or dirt from the pulley grooves. Ensure all pulleys spin freely.
- Install New Belt: Route the new Scag Genuine OEM V-Belt according to the diagram or photos you took. Ensure the belt is seated correctly in all pulley grooves.
- Tension the Belt: Re-engage any tensioning mechanisms. The belt should be taut but not overly tight. Refer to your mower's manual for proper belt tension specifications.
- Reassemble: Reattach the mower deck if it was removed. Reconnect the spark plug wire.
- Test: Start the mower and engage the deck at a low RPM in a safe, open area to ensure the belt operates smoothly without slipping or unusual noises.
6. Maintenance
Regular inspection and maintenance will extend the life of your V-belt:
- Routine Inspection: Periodically inspect the belt for signs of wear, such as cracks, fraying, glazing, or missing chunks. Check for proper tension.
- Cleaning: Keep the belt and pulleys free of grass clippings, dirt, and other debris. Debris can cause premature wear and slippage.
- Storage: If storing the mower for an extended period, ensure the belt is clean and dry. Store in a cool, dry place away from direct sunlight and chemicals.
- Replacement: Replace the belt if it shows significant signs of wear or damage, or if it consistently slips even after proper tensioning.
7. Troubleshooting
Common issues related to V-belts and potential solutions:
- Belt Slipping:
- Cause: Insufficient tension, worn belt, glazed belt, oil/grease on belt/pulleys.
- Solution: Adjust tension, replace belt, clean belt/pulleys.
- Excessive Noise (Squealing/Screeching):
- Cause: Improper tension (too loose or too tight), misaligned pulleys, worn belt, foreign object.
- Solution: Adjust tension, check pulley alignment, replace belt, remove obstruction.
- Premature Belt Wear:
- Cause: Incorrect tension, misaligned pulleys, worn pulleys, improper belt type, debris in system.
- Solution: Verify tension, check pulley alignment and condition, ensure correct belt part number, keep system clean.
8. Warranty and Support
For information regarding the warranty of your Scag Genuine OEM V-Belt, please refer to the documentation provided with your original Scag mower or contact an authorized Scag dealer. For technical support or further assistance, please reach out to Scag Power Equipment customer service or visit their official website.





