If you own a 1978 Evinrude 35 Hp outboard motor, it is essential to have a proper wiring diagram for troubleshooting and maintenance purposes. This article provides a comprehensive guide on the wiring diagram for the 1978 Evinrude 35 Hp outboard motor.
Introduction
The 1978 Evinrude 35 Hp outboard motor is a two-stroke motor that can power a small boat or pontoon. The motor is known for its reliability and durability. However, like any other mechanical device, it requires regular maintenance and troubleshooting. One of the essential aspects of maintaining this motor is understanding the wiring diagram. The wiring diagram provides a roadmap for the electrical components of the motor, making it easier to identify and fix any electrical problems.
Why do you need a wiring diagram?
The wiring diagram is an essential tool for maintaining and troubleshooting the electrical components of the 1978 Evinrude 35 Hp outboard motor. The diagram shows the electrical connections between different components such as the battery, switches, ignition coil, and starter motor. With a proper understanding of the wiring diagram, you can easily identify and fix any electrical problems, saving you time and money.
What are the components in the wiring diagram?
The wiring diagram for the 1978 Evinrude 35 Hp outboard motor consists of several components. These include the battery, ignition switch, ignition coil, starter motor, solenoid, and various wires and connections. Each of these components plays a crucial role in the electrical system of the motor.
Wiring Diagram
The wiring diagram for the 1978 Evinrude 35 Hp outboard motor is shown below:
| Wire Color | Function |
|---|---|
| Red | Battery Positive |
| Black | Ground |
| Purple | Ignition Switch |
| Yellow | Starter Solenoid |
| Orange | Choke |
| Green | Tachometer |
| Blue | Rectifier |
| White | Trim Gauge Sender |
Battery
The battery is the primary source of power for the motor. The red wire connects the positive terminal of the battery to the rest of the electrical system. The black wire connects the negative terminal of the battery to the ground.
Ignition Switch
The ignition switch is used to turn on and off the motor. The purple wire connects the ignition switch to the rest of the electrical system.
Ignition Coil
The ignition coil generates the high voltage required to ignite the fuel in the combustion chamber. The purple wire from the ignition switch is connected to the positive terminal of the ignition coil. The negative terminal of the ignition coil is connected to the engine ground.
Starter Motor
The starter motor is used to start the motor. The yellow wire connects the starter solenoid to the starter motor.
Solenoid
The solenoid is used to control the high current required by the starter motor. The yellow wire from the starter motor is connected to one side of the solenoid. The other side of the solenoid is connected to the positive terminal of the battery. The purple wire from the ignition switch is also connected to the solenoid.
Choke
The choke is used to provide extra fuel to the engine during cold starts. The orange wire connects the choke to the rest of the electrical system.
Tachometer
The tachometer is used to measure the engine speed. The green wire connects the tachometer to the rest of the electrical system.
Rectifier
The rectifier is used to convert the AC current generated by the alternator to DC current to charge the battery. The blue wire connects the rectifier to the rest of the electrical system.
Trim Gauge Sender
The trim gauge sender is used to measure the angle of the motor and display it on the trim gauge. The white wire connects the trim gauge sender to the rest of the electrical system.
FAQ
1. What is the purpose of the wiring diagram?
The wiring diagram is used to understand the electrical connections between different components of the motor. It helps to identify and fix any electrical problems.
2. What are the essential components in the wiring diagram?
The essential components in the wiring diagram include the battery, ignition switch, ignition coil, starter motor, solenoid, and various wires and connections.
3. How does the wiring diagram help in troubleshooting?
The wiring diagram provides a roadmap for the electrical system. With a proper understanding of the wiring diagram, you can easily identify and fix any electrical problems.
4. What is the function of the rectifier?
The rectifier is used to convert the AC current generated by the alternator to DC current to charge the battery.
5. How does the trim gauge sender work?
The trim gauge sender is used to measure the angle of the motor and display it on the trim gauge. It helps to adjust the trim of the motor for optimum performance.
With a proper understanding of the wiring diagram for the 1978 Evinrude 35 Hp outboard motor, you can maintain and troubleshoot the electrical components of the motor with ease.
