Charcoal canister, help me understand.

I have a clear filter before the carb, and the gas siphons back once the car is turned off. It will run off the bowl, then stall. Usually have to crank for a while, id say up to 20 seconds before getting fuel back to the carb. Not sure if the capped purge on the canister is causing this or a tired fuel pump.

Does the oil in your engine smell like fuel?

Not a /6 expert, but I believe the only way the fuel should be able to leave that section of fuel line the way you describe it is through the fuel pump diaphragm and into the crankcase. Assuming there's no outside leak in the line.