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Tim might be on to something, hard to say it's not an optical illusion. Is this a longer shaft motor on a shorter transom? Another words, why the jack plate? But if it's to high your RPM's would go up.
To me it looks like this is NOT your problem.
Lots of aftermarket Evinrude fuel ends that don't quite work. Get an OEM one.
Don't run the motor anymore until fuel lines, carb and impeller have been redone. Mechanically you should have a great motor.
Pumping the primer bulb suggests fuel pump diaphragm. A good spin on water separating fuel filter is best in your situation. Any bad fuel line left after a carb clean means you have a carb that's plugged again.