2-6 PERIODIC MAINTENANCE SPARK PLUG GAP • Measure the spark plug gap with a thickness gauge. • Adjust the spark plug gap if necessary. Spark plug gap: Standard: 0.7 – 0.8 mm (0.028 – 0.031 in) 09900-20803: Thickness gauge ELECTRODE’S CONDITION • Check the condition of the electrode. • If it is extremely worn or burnt, replace the spark plug. Replace the spark plug if it has a broken insulator, damaged thread, etc.  Confirm the thread size and reach when replacing the plug. If the reach is too short, carbon will be deposited on the screw portion of the plug hole and engine dam- age may result. SPARK PLUG AND IGNITION COIL/PLUG CAP INSTALLATION E • Screw the spark plugs into the cylinder head with fingers, and L then tighten them to the specified torque. Spark plug: 11 N·m (1.1 kgf-m, 8.0 Ib-ft) P  M Do not cross thread or over tighten the spark plug, or such an operation will damage the aluminum threads of the cylinder head. SA • Install the ignition coils/plug caps and connect their lead wire couplers.  * Do not hit the ignition coil/plug cap with a plastic hammer when installing it. * Place the ignition coil/spark plug cap so that the cou- pler does not touch the cylinder head cover. CONTACT INCORRECT INCORRECT