Originally Posted by eduardo_garcia
The main problem is that the trigger does not close the cooper tubes (where the air enters during the refuiling). So, if you point the fuel gun up and then point it down, a swall amount of fuel leaks thru the tubes. Moreover, if fill the gun and and keep injecting fuel, it also leaks from the small tubes. However, it is a problem of all fuel guns.
It is not a problem, that is the design. The guns are meant to be propped up vertical until they are ready to be used. See http://www.rbproducts.com/mainEn.php...Messina(I).htm
down on the left. The RB pit box is designed to hold the fuel gun upright. If you don't have the fancy pit box, many people just cut open an old fuel bottle for a drain and hang the gun over the side. Not too messy at all.
The small tubes are vent tubes and their design is twofold. First is to let air into the main body of the gun so fuel will actually come out at a reasonable speed. Second is to stop the flow of fuel once the fuel level reaches the vent tubes.
Not saying you, but many people have bitched and moaned about leaky fuel guns over the years and really don't know what they are talking about. The tool is what it is and yes they naturally leak a little. Get rid of the vent tubes and try your gun and you'll find it doesn't flow but a dribble. I'd rather have the faster flow, wouldn't you?