Thanks for the tips.
This is apparently a Poulan motor in the Craftsman chain saw.
The three fuel lines appear clear and unbroken. Chain saw is only a year old. Fuel filter appears unclogged when I blow on it and has no visible deposits. It's bright white. When I press the bulb, gas flows (I can tell because I emptied it accidentally while I was holding it in my hands and it filled right up with gas).
Gas is new. Mix is new.
I'm working on the carb screw as I type ...