While you wait for answers, we may have found some information which could help you.
Click here for Fit Black DeckerGrass trimmer not working correctly?
Drive belt?
How do I replace a broken drive belt on my electric Black & Decker Strimmer?
Black & Decker GW250 leaf blower/vacuum Diagram?
trim & edge reflex 545?
how to rewind the spool on black & decker strimmer gl720?