While you wait for answers, we may have found some information which could help you.
i have a qualcast B43 Strinmer where can i get a service done on it I live?
Qualcast B43 - non starter?
where can I get a new battery for qualcast trimlite 23 ?
Set screw size Qualcast B43 Mo Line Strimmer?
qualcast mo-line b43 fuel tube?
qualcast med lineauto?
where can I upload the manual for a qualcast mo - line b43 auto?