The Homelite classic hlt15 does not have a clutch.
The primer bulb or the fuel tubing may have a pin hole in it. Has the carb been messed with?
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I am a current oldtime HOMELITE dealer with an extensive inventory of NEW, NOS & USED parts.
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Bill Walcott
Brauchi Bros Inc-almost 50 yrs with HOMELITE
700 N 12th
Marysville KS 66508 USA
785-562-3539