Benchmark BG Serie Guide De L'utilisateur page 56

Draining the Carburetor
1. Turn OFF the engine and allow it to cool. Turn the fuel valve to OPEN.
2. Position a container under the carburetor drain screw. Loosen the drain
screw.
3. Allow fuel to completely drain and re-tighten the drain screw.
4. Turn the fuel valve to CLOSED.
Note on Automatic Voltage Regulation (AVR)
Your generator is equipped with an Automatic Voltage Regulator which ensures
a constant voltage and presents a waveform similar to what you get from the city
power grid. They are an improvement over basic generators but not as effective at
safely running sensitive electronics as an inverter generator or the power grid, which
produces almost perfect sine waveforms.
Therefore powering sensitive electronics with this generator is not recommended
because there is a risk damage will occur to electrical components.
TM
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Carburetor
Drain Screw
Container