To Clean The Generator; Engine Maintenance; Checking Oil Level; Changing The Oil And Oil Filter - Generac Power Systems Guardian Ultra Source 004451-1 Owner's Manual


Never insert any object or tool through the air cooling
slots, even if the engine is not running.
DO NOT use a garden hose to clean generator. Water can enter
the engine fuel system and cause problems. In addition, if water
enters the generator through cooling air slots, some water will
be retained in voids and crevices of the rotor and stator winding
insulation. Water and dirt buildup on the generator internal
windings will eventually decrease the insulation resistance of
these windings.

3.3.2 TO CLEAN THE GENERATOR

• Use a damp cloth to wipe exterior surfaces clean.
• A soft, bristle brush may be used to loosen caked on dirt, oil,
etc.
• A vacuum cleaner may be used to pick up loose dirt and
debris.
• Low pressure air (not to exceed 25 psi) may be used to blow
away dirt. Inspect cooling air slots and openings on the generator.
These openings must be kept clean and unobstructed.

3.3.3 ENGINE MAINTENANCE


When working on the generator, always disconnect
negative cable from battery. Also disconnect spark plug
wires from spark plug and keep wire away from spark
plug.

3.3.4 CHECKING OIL LEVEL

See the "BEFORE STARTING THE GENERATOR" section for
information on checking the oil level. The oil level should be
checked before each use, or at least every eight hours of operation.
Keep the oil level maintained.

3.3.5 CHANGING THE OIL AND OIL FILTER


Hot oil may cause burns. Allow engine to cool before
draining oil. Avoid prolonged or repeated skin exposure
with used oil. Thoroughly wash exposed areas with soap.
Change the oil and filter after the first eight hours of operation.
Change the oil every 100 hours thereafter. If you are running this
unit under dirty or dusty conditions, or in extremely hot weather,
change the oil more often.
14
Section 3 — Maintenance
Portable Generator System
NOTICE:
DANGER
Use the following instructions to change the oil while the engine
is still warm:
• Clean area around oil drain hose and plug.
• Remove oil drain plug from end of hose and oil fill plug to drain
oil completely into a suitable container.
• When oil has completely drained, install oil drain plug and
tighten securely.
• Place a suitable container beneath the oil filter and turn
filter counterclockwise to remove. Discard according to local
regulations.
• Coat gasket of new filter with clean engine oil. Turn filter
clockwise until gasket contacts lightly with filter adapter. Then
tighten an additional 3/4 turn.
• Fill oil sump with recommended oil. (See "Before Starting the
Generator" for oil recommendations).
• Wipe up any spilled oil.
• Dispose of used oil at a proper collection center.

3.3.6 REPLACING THE SPARK PLUG

Use Champion RC14YC spark plug or equivalent. The correct air
gap is 1.01 mm (0.040 in.). Replace the plug once each year. This
will help your engine start easier and run better.
1. Stop the engine and pull the spark plug wire off of the spark
plug.
2. Clean the area around the spark plug and remove it from the
cylinder head.
3. Set the spark plug's gap to 1.01 mm (0.040 in.). Install the
correctly gapped spark plug into the cylinder head.
Figure 18 - Spark Plug Gap

3.4 SERVICE AIR CLEANER

Your engine will not run properly and may be damaged if you run it
using a dirty air cleaner. Clean or replace the air cleaner paper filter
once a year. Clean or replace more often if operating under dusty
conditions. Clean foam pre-cleaner every month or more often
under dusty conditions.
To clean or replace foam pre-cleaner:
• Remove air cleaner cover, then foam pre-filter.
• Wash pre-cleaner in soapy water. Squeeze pre-filter dry in clean
cloth (DO NOT TWIST).
• Clean air cleaner cover before re-installing it.