Kohler 18RESL Operation Manual - Page 25

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3.4 Spark Plugs

Reset the spark plug gap or replace the plugs with new

plugs as necessary.

1. Clean the area around the base of the spark plug to

keep dirt and debris out of the engine.

2. Remove the spark plug and check its condition.

Replace the spark plug if it is worn or if its reuse is

questionable.

3. Check the spark plug gap using a wire feeler

gauge. Adjust the gap to 0.76 mm (0.030 in.) by

carefully bending the ground electrode.

Figure 3-4 and Figure 3-5.

Figure 3-4 Checking the Spark Plug Gap

Figure 3-5 Adjusting the Spark Plug Gap

TP-6517 1/11

3.5 Air Cleaner Element and

Precleaner

The engine has a replaceable high-density paper air

cleaner element with an oiled foam precleaner. See

Figure 3-6.

Check for a buildup of dirt and debris around the air

cleaner system. Keep this area clean.

Note: Operating the engine with loose or damaged air

cleaner components could allow unfiltered air

into the engine causing premature wear and

failure.

See

1--514

1--511

1. Cover knob

2. Air cleaner cover

3. Element cover nut

4. Element cover

Figure 3-6 Air Cleaner Components

Section 3 Scheduled Maintenance, 12 kW Models

586536

5. Foam precleaner

6. Air cleaner element

7. Air cleaner base