Ryobi weedwacker RY5002 wont start any ideas?

[primerbulb120]

If you don't get a muffler, you'll burn a hole right through your engine casing over time due to the hot gases exiting the exhaust port. In addition, the exhaust port will be spitting out sparks and bits of flaming carbon/oil if you don't have a muffler to catch them. Run it in the dark and you'll see what I mean.