I pulled the "L" brass fitting out of my tank sometime ago. After noticing my motor was fuel starving at high rpm, did troubleshooting, found the motor filter/separator empty after a high rpm run, and started troubleshooting some more and found ( using a clear rubber hose in ) that the fuel was picking up air bubbles from the tank. After pulling the L fitting with the long aluminum pick up tube, found that the alum tube had corroded at the threads, and had a pin point hole exactly where the tube joints the L fitting ( I guess due to galvanic corrossion because the L is brass and the tube alum ). Ended up cutting the tube 1/2" at the thread side and rethreading the tube. Problem solved.
Thread is NPT type on mine. Tube is 1/4" NPT, L is 1/2" NPT. Normal CCW thread to remove.
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