# Yamaha Regulator Rectifier 15-404 – SBT OE Replacement
The **Yamaha Regulator Rectifier 15-404** is a new aftermarket OE replacement electrical component manufactured by **SBT**, designed for compatible Yamaha WaveRunner personal watercraft.
This regulator/rectifier is suitable for listed Yamaha **Raider 1100, Venture 1100, GP 800, XL 800, XLT 800 and GP 800R** applications.
Manufactured as a replacement for Yamaha OEM part number **63M-81960-00-00**, this component provides a practical solution for replacing a faulty or damaged original regulator/rectifier.
The regulator/rectifier is an important part of the watercraft’s electrical charging system, helping regulate charging voltage and convert alternating current (AC) into direct current (DC).
Whether you’re troubleshooting charging problems, carrying out electrical repairs or restoring an older Yamaha WaveRunner, the SBT 15-404 offers a replacement option for compatible models.
## Product Details
– **Brand:** SBT
– **SKU:** 15-404
– **Product Type:** Voltage Regulator / Rectifier
– **Application:** Yamaha Personal Watercraft
– **Replacement Type:** Aftermarket OE Replacement
– **Replaces OEM:** 63M-81960-00-00
– **Condition:** New
## Compatible Yamaha Models
The **Yamaha Regulator Rectifier 15-404** is listed for compatible applications including:
– Yamaha Raider 1100
– Yamaha Venture 1100
– Yamaha GP 800
– Yamaha XL 800
– Yamaha XLT 800
– Yamaha GP 800R
**Important:** Exact compatibility may vary depending on model year and electrical system configuration.
Please confirm the original OEM part number and electrical connections before purchasing.
## Features & Benefits
– **SBT Replacement Component:** New aftermarket regulator/rectifier manufactured by SBT.
– **Multiple Yamaha Applications:** Listed for compatible Raider, Venture, GP, XL and XLT models.
– **OE Replacement:** Replaces Yamaha OEM part number 63M-81960-00-00.
– **Voltage Regulation:** Helps maintain the intended charging voltage.
– **AC to DC Conversion:** Converts generated alternating current into direct current.
– **Charging System Maintenance:** Suitable for replacing a faulty original regulator/rectifier.
– **Electrical Repairs:** Useful for diagnosing and repairing compatible Yamaha charging systems.
– **Restoration Projects:** Suitable for maintaining older Yamaha WaveRunner models.
## What Does a Regulator Rectifier Do?
The **Yamaha Regulator Rectifier 15-404** performs two essential functions within the personal watercraft’s electrical charging system.
### Voltage Regulation
The regulator helps control the voltage produced by the engine’s charging system.
Correct voltage regulation is important for maintaining normal battery charging and protecting electrical components from unsuitable charging voltages.
### AC to DC Conversion
The rectifier converts alternating current (AC) generated by the engine into direct current (DC).
This allows electrical energy produced by the charging system to be used by the battery and onboard electrical components.
Together, these functions help maintain normal electrical charging system operation.
## Signs of a Faulty Regulator Rectifier
A failing regulator/rectifier may cause a range of electrical problems.
Common symptoms include:
– Battery not charging correctly
– Battery repeatedly going flat
– Charging voltage outside the recommended range
– Intermittent electrical problems
– Difficulty starting due to low battery charge
– Overcharging or undercharging
– Electrical components behaving unexpectedly
These symptoms can also result from a faulty battery, stator, damaged wiring or poor electrical connections.
Proper testing is recommended before replacing the regulator/rectifier.
## Why Replace Your Yamaha Regulator Rectifier?
Personal watercraft electrical systems operate in demanding conditions where moisture, vibration and heat can contribute to component deterioration.
Over time, the original regulator/rectifier may become faulty and affect the charging system’s performance.
Replacing a defective regulator/rectifier with a compatible component can help restore normal charging operation.
The **Yamaha Regulator Rectifier 15-404** provides an SBT aftermarket replacement for the specified Yamaha OEM part number.
## Important Installation Information
Before installing the replacement regulator/rectifier:
1. Disconnect the battery before working on the electrical system.
2. Confirm that OEM 63M-81960-00-00 matches your original component.
3. Inspect the wiring harness and electrical connections.
4. Compare the replacement unit’s connectors and mounting arrangement.
5. Remove the faulty regulator/rectifier.
6. Install the new component according to the applicable Yamaha service manual.
7. Ensure all electrical connections are secure.
8. Reconnect the battery and test charging system operation.
Professional installation is recommended if you are unfamiliar with marine electrical systems.
## Important Fitment Information
**Brand:** SBT
**SKU:** 15-404
**Product:** Regulator / Rectifier
**Application:** Yamaha WaveRunner Personal Watercraft
**Replaces OEM:** 63M-81960-00-00
**Condition:** New
**Listed Compatible Models:**
– Yamaha Raider 1100
– Yamaha Venture 1100
– Yamaha GP 800
– Yamaha XL 800
– Yamaha XLT 800
– Yamaha GP 800R
Please confirm your exact Yamaha model, year, original OEM part number and electrical connector configuration before ordering.
This listing is for the **regulator/rectifier only**. Other electrical charging system components are not included unless specifically stated.
The **Yamaha Regulator Rectifier 15-404** is a new SBT aftermarket OE replacement designed for compatible Yamaha WaveRunner models, providing a practical option for charging system maintenance, electrical repairs and restoration projects.
