Honda ER2500CX Manual De Explicaciones página 40

4.With the generator in a level position, fill with the recommended oil
(see page 38) to the outer edge of the oil filler hole.
5.Reinstall the oil filler cap securely.
Wash your hands with soap and water after handling used oil.
SEALING WASHER
(Replace)
SERVICING YOUR GENERATOR
OIL FILLER CAP
DRAIN PLUG
UPPER LIMIT
37