The 139qmb 50cc scooter ignition wiring diagram is a crucial component of any 50cc scooter as it provides electrical power to the scooter for it to start and run efficiently. The wiring diagram shows how the various components of the scooter ignition system are connected and how they function together. Understanding this diagram can help you diagnose and solve any ignition problems your scooter may have.
What is a 139qmb 50cc Scooter?
The 139qmb 50cc scooter is one of the most popular types of scooters on the market today. It is a small, lightweight, and nimble vehicle that is easy to ride and maneuver in tight spaces. It is also affordable, making it an attractive option for those looking for a cost-effective mode of transportation.
The 139qmb 50cc scooter has a single-cylinder, four-stroke engine that is capable of producing up to 10 horsepower. It can achieve speeds of up to 30-40 miles per hour and has a range of around 60-70 miles on a full tank of gas.
Components of the 139qmb 50cc Scooter Ignition System
The ignition system of a 139qmb 50cc scooter consists of several key components, including:
| Component | Function |
|---|---|
| Ignition coil | Generates high voltage to ignite the spark plug |
| Spark plug | Produces a spark that ignites the fuel in the engine |
| CDI box | Controls the spark timing and voltage |
| Stator | Generates electrical power to charge the battery and power the scooter’s electrical system |
| Regulator/rectifier | Regulates and rectifies the electrical power generated by the stator |
Wiring Diagram for the 139qmb 50cc Scooter Ignition System
The wiring diagram for the 139qmb 50cc scooter ignition system is as follows:
| Wire Color | Component | Connection |
|---|---|---|
| Black/white | CDI box | Connected to the ignition coil |
| Red/black | CDI box | Connected to the stator |
| Green | CDI box | Connected to the frame ground |
| Black/yellow | CDI box | Connected to the kill switch |
| Red/white | Stator | Connected to the regulator/rectifier |
| Green | Stator | Connected to the frame ground |
| Red/white | Regulator/rectifier | Connected to the battery |
| Black | Regulator/rectifier | Connected to the frame ground |
Frequently Asked Questions
1. What should I do if my scooter won’t start?
If your scooter won’t start, the first thing you should check is the battery. Make sure it is fully charged and the connections are clean and tight. If the battery is fine, then check the ignition system components, including the spark plug, ignition coil, and CDI box. Make sure they are all working properly and are connected correctly.
2. How often should I replace the spark plug?
You should replace the spark plug on your scooter once a year or after every 3,000 miles, whichever comes first. A worn or fouled spark plug can cause poor performance and decreased fuel efficiency.
3. What is a CDI box?
A CDI box, or capacitor discharge ignition, is an electronic device that controls the timing and voltage of the spark produced by the ignition system. It ensures that the spark is delivered at the right time and with the right amount of voltage to ignite the fuel in the engine.
4. Can I replace the ignition system components myself?
If you have experience working with electrical systems and are familiar with the wiring diagram for your scooter’s ignition system, then you can replace the components yourself. However, if you are unsure about what you are doing or are not comfortable working with electrical systems, then it is best to have a professional mechanic perform the repairs.
5. How can I prevent ignition problems with my scooter?
You can prevent ignition problems with your scooter by keeping the battery charged, replacing the spark plug regularly, and keeping the ignition system components clean and properly maintained. It is also a good idea to follow the manufacturer’s recommended maintenance schedule and to have any problems diagnosed and repaired as soon as they arise.
