While you wait for answers, we may have found some information which could help you.
Click here for Primer Prime Lineshow do i remove and replace clutch assbly on sears 34cc 4cycle weedwacker m?
how to remove gearbox on sears weed trimmer?
Sears Model 316-791880 Gas Trimmer?
fuel line installation?
How do i set the idle,low and high speed jets?
How can I fix my Sears 25cc line trimmer?