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GX340
A
A
A
K
A
・
GX390 Maintenance Information
REGULAR SERVICE PERIOD (1)
Perform at every indicated month or operating
hour interval, whichever comes first.
ITEM
Engine oil
Air cleaner
Sediment cup Clean
Spark plug
Spark arrester
(applicable types)
Idle speed Check-adjust
Valve clearance Check-adjust
Combustion chamber Clean
Fuel tank and filter Clean
Fuel tube Check
(1) For commercial use, log hours of operation to determine proper maintenance intervals.
(2) Service more frequently when used in dusty areas. (3) Replace paper element type only.
(4) These items should be serviced by your servicing dealer, unless you have the proper tools and are mechanically proficient.
Refer to Honda shop manual for servicing procedures.
(5) In Europe and other countries where the machinery directive 2006/42/EC is enforced, this cleaning should be done by your servicing dealer.
A
OIL FILLER CAP/DIPSTICK
UPPER LIMIT
C
A
JI
Check level
B
Change
Check
Clean
D
Replace
E
Check-adjust
F
Replace
Clean
G
H
L
M
N
B
Each use
●
●
SAE Viscosity Grades
First
month
or
20 hrs.
●●
After every 500 hrs. (4)
Every 2 years (Replace if necessary) (4)
Every
3 months
or
50 hrs.
(2)
●
C
Every
6 months
or
100 hrs.
●
●
(5)
●
●
(4)
<LOW PROFILE TYPE>
ELEMENT
300 hrs.
Every
year
or
●
(3)
●
(4)
●
●
(4)
SPARK ARRESTER
G
SPARK ARRESTER
SCREEN
WIRE BRUSH
Clean the carbon deposits from the spark
arrester screen with a wire brush. Be careful
not to damage the spark arrester screen.
I
TOP HOLE
LIGN
TRIANGLE MARK
Set the piston at top dead center of the
compression stroke (both valves fully closed).
H
Specified idle speed:
1,400 ± 150 rpm
THROTTLE STOP SCREW
・On some applications the engine speed is
fixed and does not idle.
・The standard idle speed may be different
depending on the application.
Refer to the equipment manufacturer's
instructions for specific idle speed setting.
FEELER GAUGE
J
Valve clearance: 0.15 mm ± 0.02 mm (IN)
0.20 mm ± 0.02 mm (EX)
AMBIENT TEMPERATURE
Recommended oil: SAE 10W-30 or SAE 30
OIL DRAIN BOLT
D
C
PAPER
ELEMENT
NUT
IR CLEANER
COVER
WING NUT
FOAM
ELEMENT
<DUAL ELEMENT TYPE>
NONFLAMMABLE
SOLVENT
SQUEEZE THOROUGHLY
API service category: SJ or later
Engine oil capacity:
FOAM ELEMENT
D
ENGINE OIL
1.1 ℓ
PAPER ELEMENT
Paper element: Tap the element lightly several times on a hard surface to remove dirt, or blow
compressed air (not exceeding 207 kPa, 2.1 kgf/cm²
, 30 psi) through the element from the inside.
Never try to brush off dirt; brushing will force dirt into the paper fibers.
IR FILTER 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 air filter element in clean engine oil
and squeeze out the excess oil.
E
Loosen the drain screw
to drain the carburetor
thoroughly before
removal.
0.7 - 0.8 mm
O-RING
F
SEDIMENT
CUP
Standard spark plug:
BP6ES, BPR6ES (NGK)
W20EP-U, W20EPR-U (DENSO)
K
VALVE
ROCKER ARM
ROCKER ARM
PIVOT
ROCKER ARM
PIVOT LOCK NUT
・To increase valve clearance, screw out.
・To decrease valve clearance, screw in.
M
K
· Clean the fuel tank
with nonflammable
solvent and allow the
fuel tank to dry
thoroughly.
· Clean the filter with
nonflammable
solvent. Inspect the
fuel filter to be sure it
is undamaged.
O-RING
FUEL FILTER
FUEL FILTER
JOINT NUT
L
WIRE BRUSH
Remove any carbon deposits from the
combustion chamber using a wire brush.
N
FUEL TUBE
Check the fuel tubes for deterioration, cracks,
and other damage. Replace fuel tube(s) if
necessary.
© Honda Motor Co., Ltd. 2009
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