HONDA GX390 User Manual

Page 11

ENGLISH

Oil Bath & Single-Filter Element Types

Low Profile Types

WING NUT

CAP

GRID

AIR
CLEANER
CASE

OIL-BATH TYPE

AIR
CLEANER
COVER

OIL LEVEL

STEEL
WOOL

WING NUT

AIR
CLEANER
COVER

FOAM
FILTER
ELEMENT

GRID

AIR CLEANER COVER

CLIP

FILTER
ELEMENT

AIR FILTER ELEMENT

SINGLE-FILTER ELEMENT TYPE

AIR FILTER ELEMENT

Reassemble the air cleaner, and tighten the wing nut securely.

Wash the element in a solution of
household detergent and warm
water, then rinse thoroughly, or
wash in non-flammable or high
flash point solvent. Allow the
element to dry thoroughly.

Clean the air filter elements if they are to be reused.

Paper air filter element: Tap the filter element several times on a
hard surface to remove dirt, or blow compressed air [not
exceeding 207 kPa (2.1 kgf/cm , 30 psi)] through the filter
element from the inside. Never try to brush off dirt; brushing will
force dirt into the fibers.

Foam air filter element: Clean in warm soapy water, rinse, and
allow to dry thoroughly. Or clean in non-flammable 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.

CYCLONE TYPE ONLY: Remove the three pan-head screws from
the pre-cleaner cap, then remove the cyclone housing and air
guide. Wash the parts with water, dry them thoroughly, and
reassemble them.

Be sure to install the air guide as shown in the illustration.

Install the cyclone housing so the air intake tab fits into the
groove in the pre-cleaner cap.

Wipe dirt from the inside of the air cleaner case and cover using
a moist rag. Be careful to prevent dirt from entering the air duct
that leads to the carburetor.

Place the foam air filter element over the paper element, and
reinstall the assembled air filter. Be sure the gasket is in place
beneath the air filter. Tighten the air filter wing nut securely.

Install the air cleaner cover, and tighten the wing nut securely.

Remove the wing nut, and remove the air cleaner cap and cover.

Remove the air filter element from the cover. Wash the cover
and filter element in warm soapy water, rinse, and allow to dry
thoroughly. Or clean in non-flammable solvent and allow to dry.

Dip the filter element in clean engine oil, then squeeze out all
excess oil. The engine will smoke if too much oil is left in the
foam.

Oil capacities:

OIL BATH TYPE ONLY: Fill the air cleaner case to the OIL LEVEL
mark with the same oil that is recommended for the engine (see
page

Unsnap the air cleaner cover clips,
remove the air cleaner cover, and
remove the air filter element.

Soak the air filter element in clean
engine oil and squeeze out the
excess oil. The engine will smoke
during initial startup if too much
oil is left in the element.

Reinstall the air filter element and
the cover.

OIL BATH TYPE ONLY: Empty the used oil from the air cleaner
case, wash out any accumulated dirt with non-flammable
solvent, and dry the case.

60 cm (2.0 US oz , 2.1 Imp oz)
80 cm (2.7 US oz , 2.8 Imp oz)

GX270:
GX390:

07/10/25 14:41:13 32Z5F600_011