The spark plug should be taken out periodically for inspection and recapping. Measure the gap with a wire-type thickness gauge. If incorrect, adjust the gap to the specified value by bending the outer elec trode.
Spark Plug Gap
A. Spark Plug Gap
B. Outer Electrode
If the plug is oily or has carbon built up on it, clean it. The plug may also be cleaned using a high flash-point solvent and a nonmetal brush (nylon etc.). If the spark plug electrodes are corroded, or damaged, or if the insulator is cracked, replace the plug. The standard spark plug is shown in the table below.
Standard Spark Plug
NGK R6252K-105 To find out whether the plug’s heat range is correct remove the plug and examine the ceramic insulator around the center electrode. If the ceramic is light brown, the spark plug correctly matches the engine temperature. If the ceramic is burned black, the plug should be replaced with a hotter plug.
Optional Spark Plug
Hotter NGK BR9EVX
NOTE
lf the engine performance drops, try replacing the spark plug to regain performance.
Spark Plug Removal and Installation
NOTICE
When removing the spark plug cap, do not pull the lead. The lead could be broken off or damaged the wires inside.
A. Spark Plug Cap
B. Spark Plug
When reinstalling the spark plug, tighten it to the specified torque.
Spark Plug:
25.5 Nm (2.60 kgfm, 18.8 ftlb)
NOTE
lf the engine performance drops, try replacing the spark plug to regain performance.
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