Generac
®
Power Systems, Inc.
17
4.5.10 CHANGING ENGINE OIL
Refer to maintenance performed by authorized serv-
ice facilities for engine oil and filter change frequen-
cies.
Drain the oil while the engine is still warm from run-
ning. This means warm up the engine, shut it down
and drain immediately as follows:
1. Remove OIL DRAIN HOSE from its retaining clip.
2. Loosen and remove OIL DRAIN HOSE CAP. Drain
oil completely into suitable container.
3. When all oil has drained, install and tighten OIL
DRAIN HOSE CAP, and re-install into its retaining
clip.
4. Turn OIL FILTER (Figure 4.2) counterclockwise
and remove. Dispose of old filter.
5. Apply light coating of new engine oil to seal of new
oil filter. Install FILTER and tighten by hand only.
DO NOT OVERTIGHTEN.
6. Remove OIL FILL CAP. Add recommended oil (see
SPECIFICATIONS). DO NOT FILL ABOVE THE
DIPSTICK “FULL” MARK. Crankcase oil capacity
is 4.0 U.S. quarts (3.8 liters).
After refilling the crankcase with oil, always
check oil level on dipstick. NEVER OPERATE
ENGINE WITH OIL BELOW THE DIPSTICK
“ADD” MARK.
7. Start engine and check for oil leaks.
Figure 4.2 - Oil Filter
4.5.11 CHANGING THE ENGINE AIR CLEANER
To replace the engine air cleaner, (part number
0A4637), remove the air cleaner cover and replace
the air filter making sure it is positioned properly
before reattaching the cover.
See the “Service Schedule,” Section 6, for air cleaner
maintenance.
4.5.12 SPARK PLUGS
Reset the spark plug gap or replace the spark plugs
as necessary. See Section 6.
1. Clean the area around the base of the spark plugs
to keep dirt and debris out of the engine. Clean by
scraping or washing using a wire brush and com-
mercial solvent. Do not blast the spark plugs to
clean.
2. Remove the spark plugs and check the condition.
Replace the spark plugs if worn or if reuse is
questionable. See the “Service Schedule,” Section
6, for recommended inspection.
3. Check the spark plug gap using a wire feeler
gauge. Adjust the gap to 1.01 mm (0.040 inch) by
carefully bending the ground electrode (Figure
4.3).
Figure 4.3 – Setting the Spark Plug Gap
4.5.13 COOLANT CHANGE
Every year, have an Authorized Service Facility drain,
flush and refill the cooling system. See SPECIFICA-
TIONS (Section 1.10) for cooling system recommen-
dations.
4.6
MISCELLANEOUS MAINTENANCE
4.6.1 CLEANING THE GENERATOR
Keep the generator as clean and as dry as possible.
Dirt and moisture that accumulates on internal gen-
erator windings have an adverse effect on insulation
resistance.
Periodically clean generator exterior surfaces. A soft
brush may be used to loosen caked on dirt. Use a
vacuum system or dry, low pressure air to remove
any accumulations of dirt. The generator is housed
inside an all-weather enclosure, clean the enclosure
with a soft, damp cloth or sponge and water.
Once each year, have the generator cleaned and
inspected by an Authorized Service Dealer. That deal-
er will use dry, low pressure air to clean internal
windings. Parts inside the control console should be
cleaned and inspected at this time as well.
Oil Filter
!
Section 4 — Maintenance
Generac Liquid-cooled Generators
SET PLUG GAP AT 1.01 mm
(0.040 inch)
