While you wait for answers, we may have found some information which could help you.
Click here for Black Decker Strimmer
How do I thread the line on to my Black and Decker GL546 Strimmer?
Black and decker strimmer with cutting cord just pushes in?
black and decker grass strimmer?
Black and Decker GL565C?
Black and Decker GL 540?
How easy is it to replace a pull chord on a black and decker petrol strimm?