Parsun TE18BM Owner's Manual page 8

If your model includes a portable fuel tank, its parts are as follows:
1
1. Fuel tank cap
2. Fuel joint
WARNING
The fuel tank supplied with this engine could only be used as supply of fuel for its running and
must not be as a fuel storage container.
2
3
3. Air vent screw
4. Fuel gauge
2
4