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MAINTENANCE
REPLACING THE FUEL VALVE
See Figure 26.
Overtime, the fuel filter inside the fuel valve may become
dirty or clogged. To reduce the risk of engine failure, replace
the entire fuel valve including the filter according to the fig-
ures specified in the maintenance schedule or the engine
manual (if applicable).
l Turn the generator off and allow the engine to cool for
30 minutes.
l Drain the fuel tank as described previously.
l Locate the fuel valve and note the valve's orientation.
NOTE: Place an approved gasoline container beneath
the fuel valve to catch any remaining fuel.
l Using pliers, squeeze the fuel line clip and slide the fuel
line away from the filter.
l Using a wrench (22 mm) [not included], loosen and remove
the fuel valve from the tank.
l Thread the new fuel valve onto the fuel tank and tighten
securely.
l Install the fuel line onto the new fuel valve.
CHECKING/ADJUSTING THE VALVE
CLEARANCE
See Figures 27 - 28.
NOTICE
Checking and adjusting valve clear-
ance must be done when the engine is cold.
l Turn the generator off and allow the engine to cool for
30 minutes.
l Place the generator on a level surface in a well-ventilated
area.
l Remove the rocker arm cover and carefully remove the
gasket. If the gasket is torn or damaged, it must be re-
placed.
l Remove the spark plug so the engine can be rotated more
easily.
l Pull the recoil handle to rotate the engine to top dead
center (TDC). Looking through the spark plug hole; the
piston should be at the top (both valves are closed).
l Both rocker arms should be loose at TDC on the com-
pression stroke. If they are not, rotate the engine 360°.
l Insert a feeler gauge between the rocker arm and the
valve stem to measure valve clearance.
Intake Valve
Valve
0.0031 – 0.0047 in
Clearance
(0.08 – 0.12 mm)
Torque
8-12 Nm
l If an adjustment is necessary, loosen the jam nut.
l Slide the appropriate feeler gauge between the rocker
arm and the valve stem.
24 | English
FIG. 26
A - Fuel Line
B - Fuel Valve
C - Wrench (22 mm) [Not Included]
FIG. 27
A - Gasket
B - Rocker Arm Cover
C - Bolt
FIG. 28
A - Adjustment Screw
B - Jam Nut
C - Feeler Gauge
D - Rocker Arm
E - Valve Stem
Exhaust Valve
F - Push Rod
0.0051 – 0.0067 in
l Tighten the adjustment screw onto the push rod to obtain
(0.13 – 0.17 mm)
8-12 Nm
l Hold the adjustment screw in place and tighten the nut.
B
A
B
A
D
C
E
the specified clearance.
NOTE: You should be able to feel the rocker arm touch
the feeler gauge.
Torque: 106 inch-pound (12 Nm)
C
C
A
B
F
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