My Tecumseh Premier 5 hp has been a really good engine. But the fuel line had to be replaced. Now the fuel leaks at the carburetor and I suspect that it is the elbow where it enters the carburetor. This part is almost hidden behind the carburetor and not accessible when the carb is on the engine. I have no clue as to how the elbow is supposed to seal to the carburetor. It appears to swivel in the carburetor. Anyone know about this from actual experience?