While you wait for answers, we may have found some information which could help you.
Success
Message
Black and Decker GL565C?
replacing spool on grass trimmer?
Grass trimmer not working correctly?
How can I spool on my Black & Decker Strimmer GL220?
how to rewind the spool on black & decker strimmer gl720?
trim & edge reflex 545?
My black & decker GL565 strimmer does not rotate?
How do I replace a broken drive belt on my electric Black & Decker Strimmer?
Drive belt?
Black & Decker GW250 leaf blower/vacuum Diagram?
How easy is it to replace a pull chord on a black and decker petrol strimm?
Black & Decker GL540 trimmer nylon cord unravelling how can I fix that?