Hyundai HYSG150-2 User Manual page 23

12. SPARK PLUG
12.1
The spark plug MUST be fully tightened otherwise the engine will overheat causing damage.
Always complete the following steps after the engine has been turned off and allowed to cool
down
12.2
To make sure the engine runs correctly a spark plug gap of 0.6 - 0.7 mm must be
maintained and the spark plug must be free of carbon deposits.
12.3
To remove the spark plug, pull off the HT lead and then undo the spark plug using the
supplied box spanner / T bar in an anti-clockwise direction.
12.4
Once the plug has been removed check it for visual damage, electrode wear and carbon
deposits. Replace a damaged or badly worn spark plug. Clean off any carbon deposits by
using a soft brass brush.
12.5
Check the gap with a feeler gauge and adjust electrode to the correct gap of 0.6 -
0.7mm.
12.6
Check the spark plug washer for damage and replace if required.
12.7
Refit the spark plug by hand to make sure it does not cross thread, tighten the spark plug to a
torque of 12/15Nm.
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