Hartzell CD15K - 9.3.7 INSPECTION AND SERVICE OF SPARK PLUG (See figures 12-14); 9.3.7.1 With spark plug in lead, verify strong blue rotating spark. Gap of.080 to.100. Do not attempt to bend or adjust the ground disc portion of the plug.; 9.3.7.2 Clean spark plug using scotch bright pad and wiping with cleaning solution.; 9.3.7.3 After cleaning, air-blast the component.

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MM10001
Dated 1/1/08
Rev L dated 5/21/15
9.3.7 INSPECTION AND SERVICE OF SPARK PLUG (See figures 12-14)
9.3.7.1 With spark plug in lead, verify strong blue rotating spark. Gap of .080 to .100.
Do not attempt to bend or adjust the ground disc portion of the plug.
9.3.7.2 Clean spark plug using scotch bright pad and wiping with cleaning solution.
"DO NOT SAND OR BEAD-BLAST."
9.3.7.3 After cleaning, air-blast the component.
9.3.7.4 Carefully inspect the porcelain for cracks, erosion or carbon trail. Reject any
spark plug if its appearance is questionable.
9.3.7.5 Check the electrode disc for erosion. If found, replace.
Spark Plug
FIGURE 12
Spark Plug
FIGURE 13
Spark Plug
FIGURE 14
Spark Plug
FIGURE 11