SPARK PLUG● Remove the plug maintenance cover.● Remove the spark plug cap and disassemble the plug.● Check the plug for damage, contamination or deposits.● If the spark plugs are severely contaminated ordamaged, raplace with new ones. If the plugs can bereused after removing only the carbon, use plug cleanerand wire brush to clean the plugs.● Always use a feeler gauge to check the gap.SPARK PLUG GAP : 0.6~0.7mm•Make sure there is no dirt or debris on the seat of thespark plug hole before inserting the spark plug.•To prevent damage to the cylinder head, hand-tightenthe spark plug before using a wrench to tighten to thespecified torque.(torque : 14kgf·m)•Do not overtighten the spark plug.CYLINDER COMPRESSION PRESSURE● Start and warm up the engine.● Remove the plug maintenance cover.● Stop engine, and remove the spark plug cap and sparkplug.● Install a compression gauge.● Open the throttle completely, and crank the engine withthe starter motor until the gauge reading rising.•The maximum reading is usually reached within 4~7seconds.COMPRESSION PRESSURE : 10kg/cm2 (600rpm)● If the pressure is low, check the following:-Leakage from the cylinder head gasket-Piston/cylinder worn● If pressure is high, check the following:-Carbon deposits on the piston head, and cylinder head.TOOL : COMPRESSION GAUGE2-5INSPECTIONS/ADJUSTMENTSPLUG MAINTENANCE COVERSPARK PLUG CAPCOMPRESSION GAUGE