Honda GCV520 Owner's Manual page 31

5. Clean the air filter elements if they are to be reused.
Paper filter element: Tap the filter element several times on a hard
surface to remove dirt, or blow compressed air [not exceeding 30 psi
(207 kPa, 2.1 kgf/cm )] through the filter element from the clean side
that faces the engine. Never try to brush off dirt; brushing will force
dirt into the fibers. Replace the paper filter element if it is excessively
dirty.
Foam filter element: Clean in warm soapy water, rinse, and allow to
dry thoroughly. Or clean in nonflammable solvent and allow to dry.
Dip the filter element in clean engine oil, then squeeze out all excess
oil. The engine will smoke when started if too much oil is left in the
foam.
6. Wipe dirt from the inside of the air cleaner base and cover, using a
moist rag. Be careful to prevent dirt from entering the air duct that
leads on the carburetor.
7. Place the foam filter element into the air cleaner cover.
8. Install the grid over the paper filter element then install the
assembly into the air cleaner base. The grid must be placed between
the foam element and the paper element to prevent oil from
transferring to the paper element.
9. Install the cover and tighten the two air cleaner cover bolts securely.
Excess oil will restrict air flow through the foam filter element and may
transfer to the paper filter element, soaking and clogging it.
DRY
SOLVENT
SERVICING YOUR ENGINE
SQUEEZE THOROUGHLY
ENGINE OIL
PAPER ELEMENT
29