Introduction
If you own a 1985 Mercury outboard motor, you may need to refer to a wiring diagram to troubleshoot any electrical issues that may arise. A wiring diagram can help you understand how the various components of your motor are wired together and how they work. In this article, we’ll provide you with a detailed wiring diagram for your 1985 Mercury outboard motor.
The Starting System
The starting system is one of the most important parts of your outboard motor. If the starting system fails, your motor won’t start, and you won’t be able to get out on the water. The starting system includes the starter motor, starter solenoid, battery, and ignition switch. Here’s how they’re wired together:
| Component | Wire Color | Wire Gauge | Function |
|---|---|---|---|
| Starter Motor | Red/Black | 10 | Positive |
| Starter Solenoid | Yellow/Red | 18 | Positive |
| Battery | Red | 6 | Positive |
| Ignition Switch | Red/Purple | 16 | Positive |
If you turn the ignition switch to the “start” position, it sends a signal to the starter solenoid. The solenoid then sends power to the starter motor, which cranks the engine. Once the engine is running, the starter motor disengages.
FAQ
1. What if my motor won’t start?
If your motor won’t start, there could be a problem with the starting system. Check the battery, ignition switch, and starter solenoid to make sure they’re functioning properly.
2. What if my starter motor keeps running?
If your starter motor keeps running even after the engine is started, it could be a problem with the solenoid or the ignition switch. Check both of these components to see if they’re the cause of the problem.
3. What if my battery keeps dying?
If your battery keeps dying, it could be a problem with the charging system. Check the alternator and voltage regulator to see if they’re working properly.
4. Can I replace the wiring myself?
If you have experience with electrical systems and wiring, you may be able to replace the wiring yourself. However, if you’re not experienced, it’s best to take your motor to a professional.
5. What if I can’t find the problem?
If you can’t find the problem with your starting system, it’s best to take your motor to a professional. They’ll have the experience and expertise needed to diagnose and repair any issues.
The Charging System
The charging system is responsible for keeping your battery charged while you’re using your motor. It includes the alternator, voltage regulator, and battery. Here’s how they’re wired together:
| Component | Wire Color | Wire Gauge | Function |
|---|---|---|---|
| Alternator | Yellow/Red | 14 | Positive |
| Voltage Regulator | Yellow/Black | 16 | Positive |
| Battery | Red | 6 | Positive |
The alternator generates power while the engine is running, and sends it to the voltage regulator. The voltage regulator regulates the amount of power sent to the battery, preventing overcharging. This keeps the battery charged and ready to go.
FAQ
1. What if my battery isn’t charging?
If your battery isn’t charging, there could be a problem with the charging system. Check the alternator and voltage regulator to make sure they’re functioning properly.
2. What if my battery keeps dying?
If your battery keeps dying, it could be a problem with the charging system. Check the alternator and voltage regulator to see if they’re working properly.
3. Can I replace the charging system myself?
If you have experience with electrical systems and wiring, you may be able to replace the charging system yourself. However, if you’re not experienced, it’s best to take your motor to a professional.
4. What if I can’t find the problem?
If you can’t find the problem with your charging system, it’s best to take your motor to a professional. They’ll have the experience and expertise needed to diagnose and repair any issues.
Conclusion
A wiring diagram is an essential tool for troubleshooting any electrical issues with your 1985 Mercury outboard motor. By understanding how the various components are wired together, you can quickly and easily diagnose and repair any problems that may arise. If you’re not experienced with electrical systems and wiring, it’s best to take your motor to a professional for repairs.
