Honda EG5000X Owner's Manual page 26

Foam element : Wash the element in a solution of household detergent and warm
water, then rinse thoroughly, or wash in nonflammable or high flash point solvent.
Allow the element to dry thoroughly.
Soak the element in clean engine oil, and squeeze out the excess oil.
The engine
will smoke during initial start-up if too much oil is left in the foam.
Paper element : Tap the element lightly several times on a hard surface to remove
excess dirt, or blow compressed air through the filter from the inside out.
I
Never try to brush the dirt off; brushing will force dirt into the fibers.
Replace the paper element if it is excessively dirty.
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PAPER ELEMENT
FOAM ELEMENT
24