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 installed spark plugs match 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 need attention between scheduled replacements. Spark plug cleaning is rarely necessary and should not be attempted unless special equipment is available, as the spark plug can be easily damaged.
2. If necessary, mark 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 the dirt from the spark plugs using a clean brush, electric vacuum cleaner or compressed air to prevent dirt from entering the cylinders. Unscrew the candles (see illustration). Check their status as follows.
4. The condition of the spark plugs can determine the condition of the engine.
5. If the nose of the spark plug insulator is clean and white with no 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 soot, this indicates that the mixture is too rich. If the spark plug is black and oily, the engine is probably also badly worn.
7. If the nose of the insulator has a slight brown coating, the mixture is correct and the engine is probably in good condition.
8. The electrode gap of the spark plug is important. If it is too large or too small, the ignition spark size and performance will be seriously impaired. The gap must match the value given in Specifications in Section 5.
9. To set the gap, measure with a feeler gauge, then bend the open or closed outer electrode until you get the correct gap. The gap is considered correct if the appropriately sized feeler gauge is held firmly and slides freely (see illustration).
10. Before installing 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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