Maintaining The Engine Air Cleaner; Checking The Engine Spark Plug - Generac Power Systems 004703-1 Owner's Manual

3.3 MAINTAINING THE ENGINE
AIR CLEANER
3.3.1 CLEANING THE FOAM PRECLEANER
Clean and re-oil the foam pre-cleaner every three months or every
100 hours of operation, whichever occurs first. Service the foam
pre-cleaner more frequently if operating the generator in extremely
dusty or dirty conditions. Use the following procedure (Figure
3.3).
1. At the Air Box Cover, turn the plastic wing screw counter-
clockwise to loosen.
2. Remove the Air Box Cover by pulling up and left to clear the
three locating tabs.
3. Turn the exterior steel wing nut on the left side of the Air Box
Compartment counterclockwise and remove.
4. Pull the Air Filter Assembly to the right and out of the front of
the compartment.
5. Remove the foam pre-cleaner from the air filter.
6. Wash the foam pre-cleaner in liquid detergent and water.
7. Wrap the foam pre-cleaner in a clean cloth and gently squeeze
it dry.
8. Saturate the foam pre-cleaner in clean engine oil. Gently
squeeze it in a clean cloth to remove excess oil and to distrib-
ute the oil evenly (DO NOT TWIST).
9. Slide the foam pre-cleaner onto the air filter.
10. With your right hand on the air filter end, angle the assembly
into the compartment and insert the Offset Stud into the hole
on the left side of the Air Box Compartment. Before the air
filter gasket contacts the sheet metal wall, ensure the rubber
snout of the carburetor intake adapter is "captured" within the
footprint of the Air Filter.
11. Replace the steel wing nut onto the Offset Stud and tighten
clockwise.
12. Replace the Air Box Compartment Cover back into all three
locating tabs and replace the plastic wing screw (Tighten
clockwise carefully).
Figure 3.3 – Engine Air Cleaner
AIR BOX COVER
PLASTIC
WING SCREW
STEEL
WING
NUT
3.3.2 REPLACING THE PAPER AIR FILTER
Replace the Paper Air Filter Element after every 250 hours of
operation. Use the following procedure (Figure 3.3).
1. At the Air Box Cover, turn the plastic wing screw counter-
clockwise to loosen.
LOCK
WASHER
GASKET
PRE-CLEANER
OFFSET
FLAT
STUD
WASHER
AIR FILTER
2. Remove the Air Box Cover by pulling up and left to clear the
three locating tabs.
3. Turn the exterior steel wing nut on the left side of the Air Box
Compartment counterclockwise and remove.
4. Pull the Air Filter Assembly to the right and out of the front of
the compartment.
5. Twist the steel wing nut counterclockwise while holding the
offset stud. Set aside and save all this hardware for use with
the new air filter and pre-cleaner.
6. Discard old air filter and pre-cleaner safely.
7. Insert the flanged end of the Offset Stud into the new air filter
and through the hole in the end plate.
8. Install the gasket, flat washer, lock washer and wing nut in that
order. Tighten the wing nut clockwise while aligning the Offset
Stud as in Figure 3.3.
9. Saturate the foam pre-cleaner in clean engine oil. Gently
squeeze it in a clean cloth to remove excess oil and to distrib-
ute the oil evenly (DO NOT TWIST).
10. Slide the foam pre-cleaner onto the air filter.
11. With your right hand on the air filter end, angle the assembly
into the compartment and insert the Offset Stud into the hole
on the left side of the Air Box Compartment. Before the air
filter gasket contacts the sheet metal wall, ensure the rubber
snout of the carburetor intake adapter is "captured" within the
footprint of the Air Filter.
12. Replace the steel wing nut onto the Offset Stud and tighten
clockwise.
13. Replace the Air Box Compartment Cover back onto all three
locating tabs and replace the plastic screw (Tighten clockwise
carefully).
3.4 CHECKING THE ENGINE
SPARK PLUG
Clean the spark plug and reset the spark plug gap every 100 hours
of operation.
1. Clean the area around the base of the spark plug to keep dirt
and debris out of the engine. Clean by scraping or washing
using a wire brush and commercial solvent. Do not blast the
spark plug to clean.
2. Remove the spark plug and check the condition. Replace the
spark plug if worn or if reuse is questionable.
3. Check the spark plug gap using a wire feeler gauge. Adjust the
gap to 0.040 inch (1.02 mm) by carefully bending the ground
electrode (Figure 3.4).
STEEL
WING
NUT
Figure 3.4 – Setting the Spark Plug Gap
Maintenance
13