Chainsaw Repair

there shouldn't be anything but a blank hole in that area in the cylinder. deffinatly no pulse port. no idea why there would be a piece of tubing placed there.
the carb's fuel pump runs off the the back through the carb adapter. if you remove the gasket, there is a slot or groove behind it that geos around the intake track, and will line up with the pulse port in the back of the carb. nothing about these snappers are special compared the green ones.