1. Place a drainage container under the filter.
Pic. 1.58. Plug location (1) fuel drain hole in the fuel filter
2. Connect the hose at one end to the drain plug 1 (pic. 1.58), and lower the other end into a drainage container.
3. Unscrew plug 1 a few turns, and when clean fuel flows, screw it back in.
4. Remove air from the power system.