Are you having trouble with your 135 HP Mercury outboard motor? One common issue is the wiring diagram. Without a proper wiring diagram, it can be difficult to troubleshoot and fix any electrical problems with your outboard motor. In this article, we will provide you with a detailed wiring diagram and answer some frequently asked questions.
What is a wiring diagram?
A wiring diagram is a visual representation of the electrical system in your outboard motor. It shows the connections and interconnections between different electrical components such as batteries, switches, and fuses. A wiring diagram is essential for troubleshooting electrical problems and for any repairs or upgrades to the electrical system.
Here is a complete wiring diagram for a 135 HP Mercury outboard motor:
| Component | Wire Color | Function |
|---|---|---|
| Battery | Red | Positive (+) power |
| Battery | Black | Negative (-) ground |
| Ignition switch | Yellow | Ignition power |
| Ignition switch | Red/white | Accessory power |
| Trim switch | Green/white | Up trim |
| Trim switch | Blue/white | Down trim |
| Tilt switch | Green/red | Up tilt |
| Tilt switch | Blue/red | Down tilt |
| Fuel pump | Purple | Fuel pump power |
| Fuse block | Yellow/red | 12V power to all fuses |
| Fuse block | Green | Accessory power to fuses |
| Fuse block | Orange | Ignition power to fuses |
| Ground wire | Black/white | Ground connection |
FAQs
1. How do I use the wiring diagram?
First, familiarize yourself with the components and wire colors in the diagram. Then, if you are experiencing an electrical problem, use the diagram to trace the path of the affected component’s wires. Check for any breaks or damage in the wires, and ensure that all connections are secure and clean.
2. What if I need to replace a component?
If you need to replace a component, refer to the wiring diagram to ensure that the new component is wired correctly. Make sure to connect the correct wire colors to the correct terminals, and double-check your connections before turning on the power.
3. What should I do if I’m still having problems after using the wiring diagram?
If you are still experiencing problems after using the wiring diagram, it may be helpful to consult with a professional outboard mechanic. They can use the diagram to diagnose the problem and make any necessary repairs.
4. Can I modify the electrical system in my outboard motor?
Modifying the electrical system in your outboard motor can be dangerous and can lead to electrical problems or even fires. We strongly recommend that you do not attempt to modify the electrical system unless you have experience and training in electrical work.
5. What other resources can I use for troubleshooting electrical problems?
In addition to the wiring diagram, you may also find it helpful to consult the owner’s manual for your outboard motor. The manual may have additional information about the electrical system and troubleshooting tips. You can also search online forums or contact the manufacturer for support.
Conclusion
A wiring diagram is an essential tool for troubleshooting electrical problems and making repairs or upgrades to your outboard motor’s electrical system. By using the wiring diagram provided in this article and following the FAQs, you can ensure that your electrical system is functioning properly and safely. Always use caution when working with electricity and consult a professional if you are unsure.
