How to rule out a Spark Plug as your starting problem скачать в хорошем качестве

How to rule out a Spark Plug as your starting problem

NGK Iridium Spark Plug GY6 150CC https://amzn.to/2XvYgo1 NGK C7HSA SPARK PLUG GY6 150CC https://amzn.to/2XbsYU0 Donate to Virberello for Parts https://rb.gy/gzrtit Chinese Scooter Service Manual https://amzn.to/2LBfWb8 Subscribe to my youtube channel https://bit.ly/2Rcxr41 You can verify if the plug is the problem using your digital multimeter. A spark plug can be a valuable indicator as to the condition of your engine because the plug extends into the combustion chamber. When removing the plug, inspect it carefully to determine the cause and use mechanical judgment in correcting a malfunction. Spark Plug Conditions 1. Normal operation will show a light tan or gray color. The gap clearance will be slight with very little deposits on the insulator tip. 2. A plug that indicates replacement will show electrode and ground eroded away. If this condition is general on all plugs in the engine, check for sticking valves, faulty ignition leads, breaker points or weak coil or condenser. These conditions usually mean that the next hotter plug should be used. 3. Oil fouling is indicated by oily, black, sludgy deposit on the plug. A hotter plug would be recommended but will not replace a needed overhaul. 4. Splashed fouling is applied to plugs that have splotchy deposits on the insulator. These deposits have accumulated through misfiring or inefficient operation. Replacement and tuneup would be recommended for proper performance. 5. Core bridging or gap bridging is caused by materials of combustion lodging between electrode and the ground, causing the plug to short out. Excessive deposits are most common when oil control is poor or when stop and start operation is prevalent. 6. Overheating of a plug is characterized by a white or yellow glaze, a burned or blistered insulator nose and badly eroded electrodes. This may be caused by faulty thermostat, correcting engine timing, plug heat range too hot or carburetor set too rich. Service Work on Spark 1. When removing a spark plug use compressed air to blow out all foreign material around the base. 2. Do not pull on the wire itself but remove from the terminal boot. 3. Use some system to identify the wire with a certain plug. A beginner may want to use a numbered clothespin to clip on the wire. 4. Use a deep well socket with preferably a rubber or magnetic retainer inside. 5. Identify the plug with the correct cylinder. 6. Inspect the plug for cylinder malfunction as explained. 7. Clean the plug in a solvent and dry with compressed air. Be sure to clean the insulator of paint, carbon, and oxide that forms from fuel additives. 8. If the electrode is rounded off it needs to be filed flat. 9. Remove rust and carbon from the threads with a steel brush. 10. Adjust the gap between the ground and the electrode to proper specifications. This may vary from .022 inch to .040. The gap width should be checked with a round wiretype gauge. Thank you for watching my video