150BT carb issue

I have a 150BT backpack blower. the last month or so it’s been really hard to start. Maybe like 25 pulls. Normally 3-4. The primer bulb makes noise like it is working, but I don’t think it is. If I remove spark plug and dump a small but of gas directly in, it starts instantly.
I thought that the primer and the fuel followed the same route through the carb. So how could it run, but the primer not push fuel through the same orifices. BTW I removed fuel line from one side and primed...

150BT carb issue