A trimmer head spool for a vegetation trimmer machine. The spool includes a hub that defines a bore and has at least one flange or a plurality of spokes extending radially outwardly therefrom. A trimmer line conduit is defined in the spool and includes a first funnel defined in a first region of the flange or spokes and a second funnel defined in a second region of the flange or spokes. A non-radial guide channel is in fluid communication with the first and second funnels. The non-radial guide channel spans the hub's bore and does not extend through a central axis of the spool about which the spool is rotatable. The non-radial guide channel may be provided on a module that is selectively inserted into the bore and aligned with the first and second funnels. In other embodiments the entire trimmer line conduit is integrally formed in the spool.
