How to replace a throttle cable on a mcculloch 2816 string trimmer

SOURCE: Replacing the bump head on homelite string trimmer

undo the 2 screws on top of the carb. The bulb is part of a 2 piece cap undo that and it fall out.

SOURCE: looking for a copy of the owners manual for

Try mymowerparts.com

SOURCE: replace string on trimmer

Hi
check in you tube .
The video is talking about trimmer strings in general , but my experience is that all trimmers are more or less the same.
hope it helps

http://www.youtube.com/watch?v=WFu66Q6J62Q

SOURCE: Need info on putting line on troy bilt 4-cycle

Hold orange spool containing string while twisting the black plastic cap in the center, counterclockwise. This retaining cap is loosely spring loaded, so watch for the spring falling out. Once this locking cap is removed, the spool pulls right off.