Clean Spark Arrestor Screen; Adjusting Valve Clearance - Generac XP Serie Manuel De L'utilisateur

3.4.9 CLEAN SPARK ARRESTOR SCREEN

The engine exhaust muffler has a spark arrestor screen. Inspect
and clean the screen at least once each year (Figures 24 and 25).
If unit is used regularly, inspect and clean more often.
NOTE: If using the generator on any forest-covered, brush-
covered or grass-covered unimproved land, it must equipped
with a spark arrestor. The spark arrestor must be maintained in
good condition by the owner/operator.
Clean and inspect the spark arrestor when the engine is at
ambient temperature as follows:
3.6kW
1. Insert a flat blade screwdriver through the slot on the side of
the muffler heat shield to access the spark arrestor clamp.
Loosen the clamp and remove the spark arrestor screen from
the muffler.
2. Inspect screen and replace if torn, perforated or otherwise
damaged. DO NOT USE a defective screen. If screen is not
damaged, clean it with commercial solvent.
3. Replace the spark arrestor and tighten the clamp.
Figure 24 - 3.6kW Spark Arrestor
ARRESTOR
SCREEN CLAMP
SPARK
ARRESTOR
SCREEN
6.5 - 10kW
1. Remove spark arrestor from muffler by removing the screw.
2. Inspect screen and replace if torn, perforated or otherwise
damaged. DO NOT USE a defective screen. If screen is not
damaged, clean it with commercial solvent.
3. Replace the spark arrestor and secure with the screw.
INSERT SCREWDRIVER
THROUGH SLOT IN HEAT
SHIELD TO ACCESS
ARRESTOR SCREEN CLAMP
Figure 25 - 6.5, 8 & 10kW Spark Arrestor

3.4.10 ADJUSTING VALVE CLEARANCE

After the first 50 hours of operation, check the valve clearance
in the engine and adjust if necessary.
Important: If feeling uncomfortable about doing this procedure or
the proper tools are not available, please take the generator to the
nearest service center to have the valve clearance adjusted. This is
a very important step to insure longest life for the engine.
To check valve clearance:
1. Make sure the engine is at room temperature (60 ° - 80 °F)
(15.5 ° - 26.6 °C).
2. Make sure that the spark plug wire(s) is removed from the
spark plug and out of the way. Remove spark plug(s).
3. Remove the four screws attaching the valve cover(s).
4. Make sure the piston is at Top Dead Center (TDC) of its
compression stroke (both valves closed). To get the piston
at TDC, remove the intake screen at the front of the engine to
gain access to the flywheel nut. Use a large socket and socket
wrench to rotate the nut and hence the engine in a clockwise
direction while watching the piston through the spark plug
hole. The piston should move up and down. The piston is at
TDC when it is up as high as it can go.
5. Insert a 0.002 - 0.004 inch (0.05 - 0.1mm) feeler gauge
between the rocker arm and valve stem. Correct clearance
is when a slight drag is felt when sliding the gauge back and
forth. If the clearance is either excessively loose or tight the
rocker arms will need adjusting.
To adjust valve clearance:
1. Loosen the rocker jam nut (Figure 26). Use an 8mm allen
wrench for the 3.6kW/10kW and 10mm allen wrench for
the 6.5kW/8kW to turn the pivot ball stud, while checking
clearance between the rocker arm and the valve stem with a
feeler gauge. Correct clearance is 0.002-0.004 inch (0.05-0.1
mm).
NOTE: The rocker arm jam nut must be held in place as the
pivot ball stud is turned.
Maintenance
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