What causes a weak spark on a motorcycle?
Furthermore, what causes weak spark?
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
Also, what causes weak spark on ATV? Since the ignition is AC excited (no battery needed) - a weak spark tells you the pulse generator coil is telling the CDI unit to fire the coil - generally speaking, having a weak, but consistent spark rules out the pulse coil, so the culprit is either a bad ground, the CDI unit or the stator.
Also asked, what causes weak spark on outboard motor?
Weak spark may cause starting and running difficulties as there may not be enough heat generated in the spark to accomplish ignition of the fuel/air mix in the combustion chamber. Common reasons for weak spark are faulty flywheel magnets and faulty stator.
How do you know if your spark is weak?
The engine will be weak, the unburned fuel will foul the spark plug, and the exhaust will pop. If the mixture is excessively lean, the engine will misfire since the fuel molecules in the intake air are too far apart.