How do I know when my Attwood 1670 90° P-Trap Fuel Tank Vent needs maintenance?

[OAlexis]

Several signs indicate your Attwood 1670 90° P-Trap Fuel Tank Vent requires maintenance. If you notice a rush of vapor when opening the fuel fill cap, or experience fueling difficulties like fuel splashing back or the pump repeatedly shutting off, it's time to inspect the vent. Debris and spider webs can commonly clog the vent, especially after periods of storage. To clean your Attwood 1670 vent, follow these steps: First, use a 3/16" (5mm) hex wrench to unscrew the cap counter-clockwise and set it aside. Next, taking care to prevent debris from falling into the vent tube, remove the screen and clean it with solvent or compressed air. Replace the screen in its original position, and then reattach the vent cap, tightening it to a torque of 30 to 35 in·lb (3.39 to 3.95 N·Meters). Regular maintenance, ideally before and after storage or at least annually when your boat is out of the water, will help ensure your Attwood 1670 90° P-Trap Fuel Tank Vent functions correctly, preventing ventilation problems.