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CARE AND MAINTENANCE
CHECKING/ADJUSTING
CLEARANCE
See Figure 36 and 37.
NOTICE
clearance must be done when the engine is cold.
l Turn off the generator 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
replaced.
l Remove the spark plug so the engine can be rotated.
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
compression 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
l If an adjustment is necessary, hold the rocker arm pivot
and loosen the pivot adjusting nut.
l Slide the appropriate feeler gauge between the rocker
arm and the valve stem.
l Turn the rocker arm pivot to obtain the specified
clearance. Hold the rocker arm pivot and re-tighten the
pivot adjusting nut to the specified torque.
Torque: 106 inch-pound (12 Nm)
l Recheck valve clearance.
l If no further adjustments are needed, perform this
procedure on the other valve.
l When finished, install the gasket, rocker arm cover, and
spark plug.
THE
Checking and adjusting valve
Exhaust Valve
0.0051 – 0.0067 in
(0.13 – 0.17 mm)
8-12 Nm
8-12 Nm
VALVE
FIGURE 36
A - Gasket
B - Rocker Arm Cover
C - Bolt
FIGURE 37
A
A - Valve Stem
B - Rocker Arm
C - Pivot Adjusting Nut
D - Rocker Arm Pivot
C
B
A
B
C
D
English | 31
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