MSW Motor Technics MSW-TW-ET20000 Manual De Instrucciones página 33

In order to empty the fuel from the tank, place a fuel container under the
device near the leg, and place under the wheels some wooden blocks, etc., so
that the device is slightly tilted towards the transport handle (see the picture
above). Then unscrew the drain plug located at the bottom of the tank and
drain the fuel completely. After draining and before refueling, tighten the drain
plug.
3.4.2 Cleaning the electrodes and checking the space between them
1. Motor
2. Fan
3. Ignition electrodes
4. Oil nozzle
5. End of exhaust
6. Combustion chamber