TB360 Rattles when running until I pull on rope to tighten then stops

Hi, I have a TB360 190CC. For the past couple years when I am cutting with it, it rattles like a chain a loose. Once I tighten the pull start assemble rope and hold the rattle disappears. I am wondering if I were to buy a hole new pull start assembly will this rattle disappear, or is there a chance it is something else. Pull start assembly is in good shape.
Thanks in advance.
 
Look on The metal housing which has the recoil attached for the engine numbers. The pic you posted is an EPA tag only.
 
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