I must slightly beg to differ BB
My FC GMC leaf blower has always started first or second pull from cold - picked it out of the skip
A friend also has a half crank gmc trimmer - no clutch. Same engine as weedeater featherlite. He never cleaned the filter, plug or anything.
Spontaneously died 2018 after 12 ish years - put a used coil in and still goes within 2 pulls no word of a lie. bump feed was crap though