2. Faulty spark plug. A faulty spark plug will not allow the engine to start. Check the spark plug to make sure it is clean and properly gapped. If it is, you may need to replace it.
3. Clogged fuel filter. A clogged fuel filter will not allow fuel to reach the engine. Check the fuel filter to make sure it is clean and free of debris. If it is, you may need to replace it.
4. Bad fuel. Bad fuel can cause a four wheeler to start hard or not at all. Drain the old fuel from the tank and add fresh fuel.
5. Electrical problem. An electrical problem can also prevent a four wheeler from starting. Check the wiring to make sure it is in good condition and there are no loose connections. If you find any problems, repair them and see if the four wheeler will start.
6. Starter motor problem. The starter motor is responsible for turning the engine over. If the starter motor is not working, the engine will not start. Check the starter motor to make sure it is working properly. If it is not, you may need to replace it.
