Description
25 403 48-S Regulator Rectifier (2030 Amp) Kohler Genuine OEM Replacement Part
The Kohler 25 403 48-S Regulator Rectifier (2030 Amp) is a genuine OEM replacement charging system component designed for select Kohler small engines. This regulator/rectifier is responsible for converting alternator output into stable DC voltage while regulating electrical current to properly charge the battery and support engine electrical systems.
This higher-output unit (2030 amp) is commonly used in engines with greater electrical demands and is replaced when charging system problems or voltage regulation issues occur.
Product Details
-
Manufacturer Part Number: 25 403 48-S
-
Brand: Kohler
-
Part Type: Regulator Rectifier
-
Output Rating: 2030 Amp
-
Application: Engine Charging & Electrical System
-
OEM Status: Genuine Kohler OEM Replacement Part
-
Condition: New
Function
The Kohler 25 403 48-S Regulator Rectifier is designed to:
-
Convert alternator AC output into usable DC voltage
-
Regulate electrical current to prevent battery overcharging
-
Maintain consistent charging performance under load
-
Replace faulty or damaged charging regulators
-
Support reliable battery and electrical system operation
Compatibility
This OEM regulator/rectifier fits select Kohler small engines commonly used in:
-
Riding lawn mowers
-
Lawn tractors
-
Zero-turn mowers
-
Commercial outdoor power equipment
-
Engines with higher electrical output requirements
Always confirm your engine model and specification number before ordering to ensure correct fitment.
Installation / Usage
The regulator rectifier installs as part of the engine charging system and connects between the alternator and battery circuit. Replacement is recommended if experiencing:
-
Battery not charging properly
-
Voltage fluctuations or electrical failure
-
Dead battery after operation
-
Charging system warning symptoms
For best results:
-
Inspect wiring harness and connectors before replacement
-
Follow Kohler service manual installation procedures
-
Use only genuine Kohler OEM electrical components
Maintenance Tips
-
Keep electrical terminals clean and corrosion-free
-
Inspect charging system output regularly
-
Replace faulty regulators promptly to avoid battery damage
-
OEM parts ensure correct voltage regulation and durability
