1. Introduction
This manual provides essential information regarding the Arco Premium Replacement Alternator, Model 20826. It covers product specifications, general installation guidelines, operational principles, maintenance recommendations, and troubleshooting tips. Please read this manual thoroughly before installation and operation to ensure proper function and longevity of the unit.
2. Product Overview
The Arco Premium Replacement Alternator, Part #20826, is an OEM-quality replacement unit designed for marine Pleasurecraft applications. It operates at 12 Volts and provides 95 Amperes of power. Key features include an internal fan for cooling, a 2-inch mounting foot for secure installation, and a 65-mm serpentine pulley for efficient belt drive.
This alternator is a direct replacement for Pleasurecraft Alternator RA097009, SIERRA Alternator 18-6452, and MPPARTS Alternator SFD0026. Each unit undergoes stringent quality assurance to ensure it meets or exceeds original equipment manufacturer (OEM) performance standards before packaging.
Figure 1: Overall view of the Arco Premium Replacement Alternator 20826, showing its compact design and mounting points.
Figure 2: Side view of the alternator, displaying the ARCO label with part number 20826 and key specifications.
Figure 3: Front view of the alternator, highlighting the 65-mm serpentine pulley and primary mounting bracket.
Figure 4: Rear view of the alternator, illustrating the electrical connection points for power output and regulation.
3. Setup and Installation
Installation of an alternator requires technical knowledge and proper tools. It is highly recommended that installation be performed by a qualified marine technician to ensure correct wiring, mounting, and system compatibility. Incorrect installation can lead to damage to the alternator or the vessel's electrical system.
General Installation Steps:
- Safety First: Disconnect the vessel's battery before beginning any work on the electrical system.
- Remove Old Alternator: Carefully disconnect all wiring and mounting bolts from the existing alternator. Note the position of all connections.
- Mount New Alternator: Secure the Arco 20826 alternator using its 2-inch mounting foot. Ensure it is firmly bolted to prevent vibration.
- Connect Wiring: Reconnect all electrical wires to the appropriate terminals on the new alternator. Refer to your vessel's service manual for specific wiring diagrams.
- Belt Tension: Install the serpentine belt onto the 65-mm pulley and adjust tension according to manufacturer specifications. Proper belt tension is crucial for efficient operation and to prevent premature wear.
- Test System: Reconnect the battery and perform system checks to verify proper charging voltage and current output.
4. Operating Instructions
The Arco Premium Replacement Alternator is designed to automatically regulate voltage output to maintain the vessel's battery charge and power the electrical system while the engine is running. Once properly installed, no manual operation is required.
Ensure that the engine's drive belt is in good condition and properly tensioned to allow the alternator to spin freely and efficiently. Monitor your vessel's voltage gauge to confirm the alternator is charging correctly (typically around 13.8-14.4 volts when the engine is running).
5. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your alternator.
- Belt Inspection: Periodically inspect the serpentine drive belt for signs of wear, cracking, or fraying. Replace the belt if any damage is observed.
- Belt Tension: Check and adjust belt tension as needed. A loose belt can slip, reducing charging efficiency, while an overly tight belt can stress bearings.
- Electrical Connections: Ensure all electrical connections to the alternator are clean, tight, and free of corrosion. Loose or corroded connections can lead to poor performance or overheating.
- Cleanliness: Keep the alternator free from excessive dirt, oil, and debris. A clean unit dissipates heat more effectively.
6. Troubleshooting
If you experience issues with your vessel's charging system, consider the following common troubleshooting steps:
- No Charge/Low Voltage:
- Check the drive belt for proper tension and condition.
- Inspect all electrical connections for looseness or corrosion.
- Verify the battery is in good condition and fully charged.
- Check the main fuse or circuit breaker for the charging system.
- Overcharging/High Voltage:
- This often indicates a fault with the internal voltage regulator. Professional diagnosis is recommended.
- Noise from Alternator:
- A squealing noise usually points to a loose or worn drive belt.
- Grinding or rattling noises may indicate internal bearing failure, requiring professional inspection.
For persistent issues, consult a certified marine electrical technician.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | 20826 |
| Brand | Arco |
| Voltage | 12 Volts |
| Amperage | 95 AMP |
| Fan Type | Internal Fan |
| Mounting Foot | 2-inch |
| Pulley Type | Serpentine |
| Pulley Size | 65-mm |
| Product Dimensions | 9 x 7 x 7 inches |
| ASIN | B0753H1MHL |
| UPC | 693006009612 |
8. Warranty Information
ARCO Marine stands behind the quality of its products. If an ARCO product is determined to be defective under proper installation and utilization conditions, ARCO is obligated to replace or repair the product or issue a refund of the purchase price. Should a customer incur additional labor costs for a professional installation due to a confirmed defect, ARCO will reimburse said customer. This commitment underscores ARCO's confidence in its product quality and reliability.
For specific warranty claims or details regarding an additional year of parts warranty upon registration, please refer to the official ARCO Marine website or contact customer support.
9. Support and Contact
ARCO Marine is a USA-based manufacturer located in Pensacola, FL, established in 1960. They are recognized for pioneering the O/E replacement parts segment and maintaining a reputation for premium quality and part reliability. ARCO engineers its parts to exceed and outlast O/E standards, often addressing original part deficiencies.
For technical assistance, warranty claims, or any product-related inquiries, please contact ARCO Marine directly. Contact information can typically be found on the official ARCO Marine website or product packaging.
