TP-6517 4/09 27Section 3 Scheduled Maintenance, 12 kW Models
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. See
Figure 3-4 and Figure 3-5.
1--514
Figure 3-4 Checking the Spark Plug Gap
1--511
Figure 3-5 Adjusting the Spark Plug Gap
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.
1
2
3
4
5
6
7
586536
1. Cover knob
2. Air cleaner cover
3. Element cover nut
4. Element cover
5. Foam precleaner
6. Air cleaner element
7. Air cleaner base
Figure 3-6 Air Cleaner Components
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