While you wait for answers, we may have found some information which could help you.
Click here for Craftsman 17 Weedwackercraftsman wheeled weed trimmer?
17" 24 cc craftsman trimmer primer bulb replacement?
replace fuel line ?
How fuel lines connect between the carburetor, priming bulb and fuel tank ?
How can I fix my weedwacker?
Craftsman weed Wacker gas trimmer 32 cc md.989 796060?