Well, it's been three weeks since I started flying, everything is going pretty well, only a few repairs needed so far.... But I have a question. There are small air bubbles in the fuel line between the "remote" needle valve and the carb. If the engine stops, it only takes a few seconds for this part of the fuel line to empty of fuel. There are no bubbles from tank to the valve. Is it worth the trouble to get rid of the remote needle valve and replace it with a vavle at the carburetor? Is this a part that can be purchased? I tried tightening the connections of the tubes to the needle valve, wire tightened at each location, but the bubbles are still there. I think they caused one stall and a small crash, at least that is my story and I'm sticking to it!! Any information on replacing the remote needle valve and if it is possible would be appreciated! The engine is an OS 40LA, with only four or five hours on it. Thanks.