Honda EX5D Owner's Manual page 16

NOTE:
• According to season and ambient temperature, a different grade of diesel
fuel should be used. The fuel might freeze and prevent the engine from
starting if summer fuel is used in winter. If winter fuel is used in summer,
it could result in a lack of power. Be sure to use the proper grade of diesel
fuel which complies with the ambient temperature.
• Refill the fuel frequently, especially in winter. water could accumulate if
there is much air in the fuel tank. We recommend that you refill after each
use of the generator.
Air bleeding (Restart of the engine after the fuel has run out)
The generator is equipped with an automatic air bleeding system. The
engine can be started after refilling the fuel.
12