Draining
If the fuel filter warning light comes on while the engine is running "", then drain the water as follows:
1. Place a container under the fuel filter to drain (1).
2. Drain the water by unscrewing the drain valve (2) 4-5 turns. To prevent the valve from falling out, do not unscrew it too much. In the event that the water does not drain properly, manually move the piston of the low pressure pump up and down (3).
3. After the water is completely drained, tighten the drain valve (4).
4. Remove air from the fuel system (see section "Bleeding air from the fuel system").