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Here's how you can check fuel delivery: first start the engine, then shut it off. Now disconnect the fuel line at the carb and direct it into a glass or clear plastic bottle.
Have someone (or you, if you can wrangle it) start the engine. You should see a heavy stream of fuel pumped into the bottle at idle. There are usually specs for this, but as a rule of thumb, if you see a thick stream it is fine.
If there is a clogged filter, faulty fuel pump etc. the fuel will just dribble out.
The carb will idle for quite some time with the fuel line disconnected, using the fuel remaining in the carburetor fuel bowl.

Oh yeah, make sure you can shut off the engine before the bottle overflows!
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