Westpro Westinghouse WH3250 Series, Service Manual, Page: 39 / 64

7-9
MAINTENANCE
CLEANING THE SPARK
ARRESTOR
Check and clean the spark arrestor after every 100
hours of use or 6 months.
1. Stop the generator and let it cool for several
minutes if running.
2. Move the generator to a fl at, level surface.
3. Using a fl athead screwdriver, loosen the spark
arrestor band clamp (see Figure 7-19) .
3
1
2
Figure 7-19 – Spark Arrestor Assembly
1 - Spark Arrestor
Band Clamp
2 - Spark Arrestor
Screen
3 - Muffl er
4. Slide the spark arrestor band clamp off the spark
arrestor screen.
5. Pull the spark arrestor screen off the muffl er
exhaust pipe.
6. Using a wire brush, remove any dirt and debris that
may have collected on the spark arrestor screen.
7. If the spark arrestor screen shows signs of wear
(rips, tears or large openings in the screen), replace
the spark arrestor screen.
8. Install the spark arrestor components in the
following order:
a - Place spark arrestor screen over the muffl er
exhaust pipe. Push on the screen until it fully
bottoms out.
b - Place the spark arrestor band clamp over the
screen and tighten with a fl athead screwdriver.
CHECKING AND ADJUSTING
VALVE LASH
!
CAUTION
!
Checking and adjusting valve lash
must be done when the engine is cold.
1. Loosen the clamp and disconnect the breather
hose from the rocker arm cover (see Figure 7-20) .
2
3
1
Figure 7-20
1 - Clamp
2 - Breather Hose
3 - Bolts
2. Remove the bolts (see Figure 7-20) and rocker arm
cover and carefully remove the gasket. If the gasket
is torn or damaged, it must be replaced.
3. Remove the spark plug so the engine can be
rotated more easily.
4. 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.
5. Both the rocker arms should be loose at TDC on
the compression stroke. If they are not, rotate the
engine 360°.