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Description
21066-0787 – Voltage Regulator (Genuine Kawasaki OEM Part)
The Kawasaki 21066-0787 Voltage Regulator is a genuine OEM replacement electrical component engineered to control and stabilize the alternator’s output voltage on compatible Kawasaki small engines. This regulator helps ensure the charging system maintains the correct voltage range to charge the battery properly and support reliable electrical performance under varying engine loads.
Manufactured to Kawasaki original equipment specifications, the 21066-0787 voltage regulator provides dependable operation, correct fitment, and long-lasting durability in demanding outdoor power equipment applications.
Product Details
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Manufacturer Part Number: 21066-0787
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Brand: Kawasaki
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Part Type: Voltage Regulator / Rectifier
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System: Electrical / Charging System
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OEM Status: Genuine Kawasaki OEM Replacement
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Condition: New OEM Part
Function
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Regulates alternator output to maintain stable charging voltage
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Protects the battery from overcharging or undercharging
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Supports consistent starting and electrical system reliability
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Helps prevent voltage spikes that can damage components
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Designed for OEM-level fit, performance, and durability
Compatible With
The 21066-0787 Voltage Regulator fits select Kawasaki engine models and outdoor power equipment platforms that require this particular regulator design.
Common compatible engine families may include:
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Kawasaki FX Series engines
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Kawasaki FR Series engines
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Kawasaki FS Series engines
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Other Kawasaki small engines using compatible charging/rectifier systems
(Exact model compatibility varies by engine model, specification number, and serial range. Always verify fitment using your specific Kawasaki engine model and serial number before ordering.)
How It’s Used
This voltage regulator installs within the engine’s charging system, often mounted near the alternator and connected to the electrical harness. Proper installation ensures that the alternator produces the correct voltage to keep the battery charged and support electrical loads during operation.
Refer to your Kawasaki service or repair manual for correct installation procedures, wiring instructions, and torque specifications.



