Originally Posted by
Raleighcopter
Are you sure you're not getting small air bubbles leaking in where the tubing is connected to the solenoid or even at the tank? I usually double up the tubing at the nipples.
Everything holds pressure solid at 3 psi, no leak down. That's with the carb line plugged and applying pressure through the muffler pressure line.
Bubbles in the fuel line stopped with the installation of the heat isolators.