3. Wipe away dust or debris from inside of the air
box and around edges.
4. Install the new air cleaner into the air box.
5. Install the cover. Turn the two cover screws clock-
wise to tighten.
See the “Service Schedule,” Section 4.13 for air
cleaner maintenance. See Section 1.5.1 for air filter
replacement part number.
Figure 4.6 — 7 kW, Engine Air Cleaner Location
Air Cleaner
Fuel
Re
g
ulator
3/4" Hole
Figure 4.7 — 12 kW and 15 kW Engine
Air Cleaner
Cover
Filter
Screw
4.6 SPARK
PLUG(S)
Reset the spark plug(s) gap or replace the spark
plug(s) as necessary. See Section 4.13 for mainte-
nance requirements.
1. Clean the area around the base of the spark
plug(s) 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(s) to clean.
2. Remove the spark plug(s) and check the condi-
tion. Replace the spark plug(s) if worn or if reuse
is questionable. See Section 4.13 for recommend-
ed inspection.
3. Check the spark plug gap using a wire feeler
gauge. Adjust the gap to 0.76 mm (0.030 inch)
for 7 kW and 0.50 mm (0.020 inch) for 12/15 kW
by carefully bending the ground electrode (Figure
4.8).
Figure 4.8 – Setting the Spark Plug Gap
4.7 BATTERY
MAINTENANCE
The battery should be inspected per the “Service
Schedule,” Section 4.13. The following procedure
should be followed for inspection:
1. Inspect the battery posts and cables for tightness
and corrosion. Tighten and clean as necessary.
2. Check the battery fluid level of unsealed batteries
and, if necessary, fill with DISTILLED WATER
ONLY. DO NOT USE TAP WATER IN BATTER-
IES.
3. Have the state of charge and condition checked.
This should be done with an automotive-type bat-
tery hydrometer.
DANGER
Do not dispose of the battery in a fire. The
battery is capable of exploding.
A battery presents a risk of electrical shock
and high short circuit current. The following pre-
cautions are to be observed when working on
batteries:
• Remove watches, rings or other metal objects;
• Use tools with insulated handles;
• Wear rubber gloves and boots;
• Do not lay tools or metal parts on top of the
battery; and
• Disconnect charging source prior to connecting or
disconnecting battery terminals.
Section 4 — Maintenance
Air-cooled 7 kW, 12 kW and 15 kW Generators
SET PLUG GAP AT 0.76 mm (0.030 inch) 7kW
(0.508 mm (0.020 inch) 12/15kW
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