1. Unscrew the plug, close the hole with a cloth and, pressing the manual priming pump, pump the system until fuel begins to flow through the cloth without air bubbles.
2. Install a new plug with gasket and tighten the plug to 5 Nm.
3. After tightening, press the fuel priming pump button until you feel sufficient resistance.
4. When finished, remove the wet rag, wipe down the engine compartment and check for fuel leaks.