Honda EU3000IS1AG Owner's Manual page 60

SERVICING YOUR GENERATOR
10. Install the upper muffler protector and the rear cover in the reverse order of
removal.
OIL FILLER NECK
RUBBER DRIP
GUARD
When installing the rear cover, carefully fit the rubber drip guard around the
oil filler neck and oil drain neck.
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OIL DRAIN NECK
UPPER MUFFLER
PROTECTOR
REAR COVER