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MAINTENANCE
CLEANING THE SPARK ARRESTOR
Check and clean the spark arrestor after every 100
hours of use or 6 months.
1. Stop the inverter and let it cool for several minutes
if running.
2. Move the inverter to a flat, level surface.
3. Remove the 4 screws holding the muffler cover in
place (see Figure 22).
Figure 22: Remove screws holding muffler cover
4. Once the cover is removed take a pair of plyers and
pull off the spark arrester. (see Figure 23)
Figure 23: Remove and clean spark arrestor
5. Using a wire brush or compressed air, remove any
dirt and debris that may have collected on the
spark arrestor screen.
6. If the spark arrestor screen shows signs of wear
(rips, tears or large openings in the screen), replace
the spark arrestor screen.
7. Install the spark arrestor back into the muffler. Make
sure to fully push it in so that it is tight on the tip of
the mufler.
10. Replace the mufler cover and tighten all 4 screws.
22 | Westinghouse Portable Power
SPARK ARRESTOR SCREEN
CHECKING AND ADJUSTING VALVE LASH
CAUTION
Checking and adjusting valve lash
must be done when the engine is cold.
1. Remove the rocker arm cover and carefully remove
the gasket. If the gasket is torn or damaged, it must
be replaced.
2. Remove the spark plug so the engine can be rotated
more easily.
3. Rotate the engine to top dead center (TDC) of the
compression stroke. Looking through the spark plug
hole, the piston should be at the top.
4. Both the rocker arms should be loose at TDC on the
compression stroke. If they are not, rotate the engine
360°.
5. Insert a feeler gauge between the rocker arm and the
push rod and check for clearance (see Figure 24).
See Table 2 for valve lash specifications
1
(1) Push Rod, (2) Feeler Gauge Area
(3) Rocker Arm, (4) Jam Nut, (5) Adjusting Nut
Table 2: Standard Valve Lash
Intake Valve
Valve Lash
.0023-.0039in
(.06-.10mm)
Bolt Torque
6. If an adjustment is required, hold the adjusting nut
and loosen the jam nut.
7. Turn the adjusting nut to obtain the correct valve lash.
When the valve lash is correct, hold the adjusting nut
and tighten the jam nut to 106 in-lb (12 N•m).
8. Recheck the valve lash after tightening the jam nut.
9. Perform this procedure for both the intake and ex-
haust valves.
10. Install the rocker arm cover, gasket and spark plug.
2
3
4
5
Figure 24
Exhaust Valve
.0031-.0048in
(.08-.12mm)
8-12N.m
8-12N.m
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