An easy way to do the external pulse on a Homelite, is to put one in the backplate. If you put it in the center of the backplate, it is not in the way of anything, and you don't even have to drill and tap; just use a pressure tap with a nut. (You also don't have to take the engine apart; just remove the backplate.) Be sure to use Loctite or CA glue on the nut however, so that it can't come off and make a mess inside the engine!!

On the carb in the fuel pump cover, there is a raised boss that is used on many Walbro carbs for a factory external pulse. All you have to do is drill through that boss, tap it and insert a pressure tap fitting. Then connect it with your backplate pressure tap with a piece of tubing, and you're "Good to go!"

AV8TOR