Westinghouse iGen2800 User Manual page 22

MAINTENANCE
CHECKING/ADJUSTING THE VALVE
CLEARANCE
See Figures 21 - 22.
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.
l Tighten the adjustment screw onto the push rod to obtain
the specified clearance.
NOTE: You should be able to feel the rocker arm touch
the feeler gauge.
l Hold the adjustment screw in place and tighten the nut.
Torque: 106 inch-pound (12 Nm)
l Recheck valve clearance.
l If no further adjustments are needed, perform this proce-
dure on the other valve.
l When finished, install the gasket, rocker arm cover, and
spark plug.
22 | English
FIG. 21
A - Rocker Arm Cover
B - Bolt
C - Gasket
FIG. 22
A - Adjustment Screw
Exhaust Valve
B - Jam Nut
C - Feeler Gauge
0.0051 – 0.0067 in
D - Rocker Arm
(0.13 – 0.17 mm)
E - Valve Stem
F - Push Rod
8-12 Nm
B
A
C
D
C
E
A
B
F