Please see the attachemet;
1.The fuel tube is not safe for non-blocking of fuel. I suggest you to turn the direction of Intake fuel pipe and go the green line way.

2.It seems the fuel tank already broken. This will make the engine lean. Fully clean its outside. Then start your engine and check if it still oily outside.

3.Try to make the throttle linkage and servo arm vertical. Then make sure it will back to the idle place everytime when you close the TX throttle. Why you don't have return spring? Or I can't see it?

Hope this help...take another photo for me. I want to see the whole throttle linkage system.