Honda EM25 Manuel De L'utilisateur page 33

Oil Alert system
The Oil Alert system is designed to prevent engine damage caused by
an insufficient amount of oil in the crankcase. Before the oil level in the
crankcase falls below a safe limit, the Oil Alert system will
automatically shut down the engine (the engine switch will remain in
the ON position).
If the Oil Alert system shuts down the engine, the Oil Alert indicator
light (red) will come on when you pull the starter grip, and the engine
will not run. If this occurs, add engine oil (see page 14).
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OIL ALERT INDICATOR
LIGHT (RED)