Kohler 4EFRKM, Operation, Page: 24 / 40

TP-6081 4/00 12 Section 3 Scheduled Maintenance
1. 0.7--0.8 mm (0.028--0.031 in.) gap
2. Spark plug electrode
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1
2
Figure 3-5 Spark Plug Gap Inspection
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Figure 3-6 Spark Plug Gap Adjustment
5. Clean the spark plug by wiping it with a rag.
Note: Do not sandblast, wire brush, scrape, or
otherwise service a spark plug in poor
condition. Obtain a new plug for the best
results.
6. Check the spark plug gap before installing any
spark plug. See Figure 3-5. Attain a correct gap
when the feeler (or wire) passes between the spark
plug electrode. It should pass easily but with some
resistance or drag; otherwise adjust as necessary.
The correct gap is 0.7--0.8 mm (0.028--0.031 in.).
7. Use a gapping tool to gently bend the side
electrode closer to or farther from the center
electrode to set the correct gap. See Figure 3-6.
Position the side electrode directly over the center
electrode.
8. Reinstall the spark plug by hand so as not to cross
thread. Do not bump the electrode against the
cylinder head. Rotate the spark plug clockwise
until feeling resistance.
9. Use a torque wrench to torque the spark plug to
20 Nm (14 ft. lb.). Otherwise, hand-tighten the
spark plug until feeling resistance.
10. Use a ratchet wrench to final tighten an additional
1/4 turn. Do not overtighten, as doing so may strip
threads or alter the electrode gap setting.
11. Check the spark plug wire connector in the boot for
accumulated dirt, grease, and other debris, and
clean as necessary.
12. Firmly push the spark plug boot onto the spark
plug.