593490 Voltage Regulator — Briggs & Stratton OEM Charging System Regulator The Briggs & Stratton 593490 Regulator is a genuine OEM voltage regulator designed to control and stabilize the electrical output of the engine’s charging system. This component ensures the battery receives the proper charging voltage while preventing overcharging or electrical system damage. It is a critical replacement part for maintaining reliable battery performance and consistent operation of lawn mowers, garden tractors, and other outdoor power equipment equipped with 12 V charging systems. Product Details Item Number: 593490 Brand: Briggs & Stratton Part Type: Voltage Regulator / Charging System Regulator Design: OEM electrical regulator for small engine charging circuits Condition: New Genuine OEM Replacement Part Voltage System: Designed for 12 V battery charging systems Application: Regulates alternator/stator output to protect battery and electronics Typical Dimensions: Approx. 3.5″ × 2.5″ × 1.5″ (may vary slightly by engine model) Function This voltage regulator is engineered to: Maintain safe, consistent charging voltage to the battery Prevent overcharging that can damage batteries and electrical components Support proper operation of headlights, ignition systems, and accessories Replace faulty regulators causing weak charging, dead batteries, or voltage spikes Provide OEM-correct electrical performance and durability Verify Fitment Before Ordering Before purchasing, confirm: Your engine uses a 12 V charging system with a regulator-equipped alternator/stator The 593490 regulator matches your engine’s parts diagram Mounting holes and connector style match the original part ⚠️ Charging regulators vary widely by engine series — always verify the correct part number using your engine model/type code before ordering. Compatibility This OEM voltage regulator is commonly used on a range of Briggs & Stratton engines found in: Select V-Twin Intek engine series 44T and 49T engine families Riding mower and garden tractor applications Engines equipped with regulated charging alternators (Compatibility list is representative — confirm exact fitment with your engine parts lookup.) Installation / Usage Disconnect the battery before servicing electrical components. Locate the regulator near the flywheel housing or engine shroud. Unplug the wiring connector from the old regulator. Remove mounting bolts and detach the regulator. Install the new 593490 regulator in the same position. Reconnect wiring harness securely. Reconnect battery and test charging output with engine running. Maintenance Tips Keep regulator cooling fins and mounting area clean for proper heat dissipation. Inspect wiring harness for corrosion or loose connections. Test battery health regularly — weak batteries can stress charging components. Replace regulator if battery repeatedly fails to charge or voltage is unstable. Notes / Equivalent Replacements Genuine Briggs & Stratton OEM part 593490 ensures correct voltage regulation, proper connector fit, and long-term reliability compared to aftermarket alternatives. Always use OEM regulators to protect sensitive electrical systems.
