Full service every 30,000 km or 24 months.
1. The correct operation and performance of the engine depends on the correct functioning of the spark plugs. It is essential that the spark plugs installed are suitable for the engine (the appropriate type is defined at the beginning of this Section). If this type is used and the engine is in good condition, the spark plugs should not require attention between scheduled replacements. Cleaning the spark plug is rarely necessary and should not be attempted unless special equipment is available, as the plug can be easily damaged.
2. If necessary, mark the high voltage wires from 1 to 4 (1 cylinder closest to the engine drive toothed belt) and take them off.
3. It is advisable to clean dirt from the spark plugs using a clean brush, electric vacuum cleaner or compressed air to prevent dirt from getting into the cylinders. Unscrew the spark plugs (see illustration). Check their condition as follows.
4. The condition of the engine can be determined by the condition of the spark plugs.
5. If the nose of the spark plug insulator is clean and white, without carbon deposits, this indicates a weak mixture or a spark plug that is too hot.
6. If the tip and nose of the insulator are covered with hard black carbon, this indicates that the mixture is too rich. If the spark plug is black and oily, the engine is probably also very worn.
7. If the nose of the insulator is covered with a light brown coating, the mixture is correct and the engine is probably in good condition.
8. The spark plug gap is of great importance. If it is too large or too small, the spark size and performance will be seriously weakened. The gap should be consistent with the value given in Specifications in Section 5.
9. To set the gap, measure it with a feeler gauge, then bend the open or closed outer electrode until you get the correct gap. The gap is correct if a feeler gauge of the correct size holds firmly and slides freely (see illustration).
10. Before installing the spark plugs, check that the outer surface of the spark plug and the threads are clean.
11. Screw in the spark plugs by hand where possible, then tighten them to the specified torque Specification.
12. Connect the high voltage wires in the correct order.
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