How to set the gap
The reason for the formation of gaps lies in the technical condition of the engine, which does not ensure the correct adjustment of the fuel-air mixture, as a result of which an excessively rich working mixture is formed. The reasons may also be the pollution of the air filter, the malfunction of the cold start system, etc.
Check the spark plugs directly on the engine running with a neon lamp or using a shutdown method. Possible test option on a special device. Using a neon lamp, it is possible to establish the presence of high voltage on the electrodes of the spark plug during the operation of the ignition system. To do this, connect one wire of the lamp to the engine mass, and the second - alternately to the central electrodes of the candles. In this case, the engine must be well heated and run at low speed. With a working candle, the lamp emits a bright, periodically flashing light. Conversely, a faint glow is a consequence of insufficient voltage.
To determine the exact cause of the fault, swap the serviceable and faulty plugs from another cylinder of the same engine.In the event of an engine interruption, check all the plugs on a special device in the chamber where compressed air is pumped under a pressure of 7-8 kg / cm2. If in the process of checking there is no spark, there are interruptions in the sparkle or a spark jumps over the surface of the insulator skirt, which means that the candles are faulty.
For checkgapThere is a special circular probe. If necessary, adjust the gap by bending the side electrodes with a slat with a side slot. All candles on this engine gaps between the electrodes should be the same. Dry or oily dark soot is removed from the candles in a sandblasting unit with quartz sand with a grain size of 1000-2500 holes / cm2.
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