Having primed the bulb,The bulb does'ent seem completly full.Having pulled the starter cord,The engine starts momentary then cuts out.No matter how many times I prime it and try to start it,It won't run.
Stating the obvious this is fuel starvation, things to check, fuel filter in the tank blocked, fuel hoses leaking, non return valve in the purge bulb not working, whip the muffler off and check the condition of the piston through the exhaust port, strip carb clean internal filter, check diaphram condition, always check the easy things first before going on to the carb strip down.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix chainsaws.