Hello Everyone:

I hope this doesn't turn into a "Ford vs Chevy" discussion, however, on there are things which go by the name of "bubbleless clunks" which are supposed to cut down on air bubbles getting into the fuel line.

Do they work?

The reason why I'm asking this is because I have something like this fitted to my plane, last Sunday for no obvious reason the engine went lean. When I got home I notice that the bubbleless clunk was partly blocked. If it cuts down on air bubbles getting into the fuel line, I will gladly clean it every few months, however, I'm now wondering if it's doing any real good.

Bye, Ian