Honda GX610 Owner's Manual page 35

SERVICING YOUR HONDA ENGINE
Paper air 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 kg/cm2)] through the filter element from the air cleaner cover side.
Never try to brush off dirt; brushing will force dirt into the fibers. Replace the
paper element and both gaskets if it is excessively dirty.
Foam air 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 body and cover, using a moist
rag. Be careful to prevent dirt from entering the air chamber that leads to
the carburetor.
7. Place the foam air filter element to the air cleaner body. Be sure the gaskets
are in place, then reinstall the paper airfilterelement and cover. Tighten the
air filter wing bolt securely.
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