Restore your Black & Decker LST522 string trimmer to reliable operation with genuine OEM replacement parts from Repair Clinic. The LST522 is a cordless battery-powered string trimmer using a 20-volt lithium-ion battery, distinguishing its service needs from gas-powered trimmers with carburetors and fuel systems. The spool assembly, motor, battery, and trigger switch are the most frequently serviced components. Repair Clinic stocks genuine Black & Decker OEM parts for the LST522 including the Black and Decker trimmer spool parts, Black and Decker trimmer motor parts, and Black and Decker trimmer switch parts. Browse the Black and Decker string trimmer parts catalog filtered by LST522 for the complete parts inventory.
Black & Decker LST522: Cordless 20-Volt String Trimmer Service
The Black & Decker LST522 uses a 20-volt lithium-ion battery and electric motor rather than a gas engine, eliminating carburetor and fuel system maintenance entirely. Most service issues trace to the battery, the spool line-feed mechanism, or the trigger switch rather than engine components. The string trimmer repair help section covers LST522 spool reloading, battery diagnosis, and switch testing.
Most Replaced Parts on the Black & Decker LST522
Spool Assembly for the Black & Decker LST522
The spool houses the trimmer line and the automatic feed mechanism. A spool that no longer advances line automatically, has tangled line, or has a worn feed mechanism should be replaced as a complete assembly.
Motor for the LST522
A motor that runs slowly or stalls under light trimming load may have worn brushes or internal wear. Test with a fully charged battery before condemning the motor.
Battery for the Black & Decker LST522
A depleted or aged battery is the most common cause of a trimmer that will not turn on or loses power quickly. Test the battery in another compatible 20-volt tool to confirm it independently.
Trigger Switch for the LST522
A trigger switch that does not engage the motor when pressed, or that causes the motor to run continuously without trigger input, must be replaced.
Why Choose Repair Clinic for Black & Decker LST522 Parts
- Genuine Black & Decker OEM Components: Spool assemblies, motors, and trigger switches confirmed for the Black & Decker LST522 cordless 20-volt trimmer Black and Decker string trimmer parts.
- Cordless Service Profile: The LST522 has no carburetor or fuel system. Service needs center on the battery, motor, and spool feed mechanism instead.
- String Trimmer Repair Resources: Spool reloading and battery diagnosis documented through string trimmer repair help.
- 365-Day Returns: Return any uninstalled Black & Decker part within a full year of purchase with no restocking fees.
Black & Decker LST522 String Trimmer Parts FAQ
What is the Black & Decker LST522 and what power source does it use?
The Black & Decker LST522 is a cordless battery-powered string trimmer, distinguishing it from gas-powered trimmers that use a carburetor and fuel system. The LST522 uses a 20-volt lithium-ion battery driving an electric motor and spool-style trimmer head.
Why won’t my Black & Decker LST522 turn on?
A cordless trimmer that will not turn on most commonly has a depleted or failed battery, a battery not fully seated in the trimmer, or a failed trigger switch. Charge or test the battery in another compatible tool before testing the switch.
How do I reload the trimmer line on the Black & Decker LST522?
Press the release tabs on the spool cover to remove the spool. Wind the replacement line in the direction indicated by the arrow molded into the spool, leaving the manufacturer-specified length free, then thread the ends through the eyelets and reinstall the spool cover.
Why does my Black & Decker LST522 not feed new line automatically?
An automatic line feed that does not advance line most commonly has a spool that has run out of line, line that has become tangled on the spool, or a worn feed mechanism inside the spool housing. Inspect and rewind the spool before replacing the spool housing.
