Here's another pic. This one is of a Homelite with an added external pulse line. I did an external pulse line on a Ryobi the other day, but I don't have a pic of it and the airplane isn't here.

If you add an external pulse line, plug the original pulse hole in the carb with some JB Weld or drill and tap it for a tiny set screw to close it off.

AV8TOR