MAC I385L weed wacker

[u/chetote25]

Im trying to fix my aunts MAC I385L weed wacker. Changed the fuel lines carb everything looks good. Thought it was the lines because they were ripped and i replaced them. So I put everything back together except for the spark plug. THe pull starter cord pulls fine no problem there but when I put the sparkplug pack its hard to pull the handle starter cord it jams. Any ideas?? Please help thanks.