LAXEEM MNR156 Electric Start Engine Wiring Harness Instruction Manual

1. Introduction

This instruction manual provides essential information for the proper installation, operation, and maintenance of the LAXEEM MNR156 Complete Electric Start Engine Wiring Harness. This kit is designed for 50cc, 70cc, 90cc, 110cc, and 125cc 4-stroke ATV, Quad, Dirt Bike, Kawasaki KLX, Coolster Go Kart, 4-wheelers, Scooter, and Buggy Motowork vehicles. It is crucial to read and understand all instructions before attempting installation.

Important Note: This harness set is NOT compatible with GY6 design engine types. Professional installation is highly recommended to prevent incorrect assembly, which may lead to damage or fire.

2. Package Contents

Verify that all the following components are included in your package:

• 1x Wiring Loom Harness
• 1x Spark Plug
• 1x Ignition Coil with lead
• 1x Key Switch
• 1x CDI (Capacitor Discharge Ignition)
• 1x Rectifier
• 1x Solenoid
• 1x Ignition Switch (Handlebar Switch)

3. Setup and Installation

Installation of an electrical wiring harness requires careful attention to detail and a good understanding of electrical systems. If you are not confident in your abilities, seek professional assistance.

3.1 General Wiring Overview

The wiring loom harness connects all electrical components necessary for the electric start system. Ensure all connections are secure and properly insulated.

Figure 1: Overview of the complete wiring harness kit.

3.2 Component Identification and Connection

• Wiring Loom Harness: This is the main bundle of wires that connects all components. Route it carefully, avoiding sharp edges or areas of high heat.
• CDI (Capacitor Discharge Ignition): Connect the CDI unit to its corresponding connector on the main harness. The CDI is crucial for engine ignition timing.

  Figure 2: CDI Unit.

• Rectifier: The rectifier converts AC voltage from the stator into DC voltage to charge the battery and power the electrical system.

  Figure 3: Rectifier.

• Solenoid: The solenoid acts as a relay for the starter motor. Connect its wires to the harness and ensure the main battery cables are securely attached.

  Figure 4: Solenoid.

• Ignition Coil and Spark Plug: The ignition coil generates high voltage for the spark plug. Connect the coil to the harness and the spark plug wire to the spark plug.

  Figure 5: Ignition Coil and Spark Plug.

• Key Switch: Install the key switch in an accessible location and connect its wires to the harness. This controls the main power to the ignition system.

  Figure 6: Key Switch.

• Ignition Switch (Handlebar Switch): Mount the handlebar switch, which typically includes the engine kill switch and electric start button, and connect it to the harness.

  Figure 7: Handlebar Ignition Switch.

After connecting all components, double-check all connections for tightness and proper routing. Ensure no wires are pinched or exposed.

4. Operating Instructions

Once the wiring harness is correctly installed and all components are connected, the electric start system can be operated.

1. Turn the Key Switch: Insert the key into the key switch and turn it to the 'ON' position. This supplies power to the electrical system.
2. Ensure Kill Switch is OFF: Verify that the engine kill switch on the handlebar is in the 'RUN' or 'OFF' position (not 'KILL' or 'STOP').
3. Press the Start Button: Locate the electric start button on the handlebar switch and press it firmly. The starter motor should engage and crank the engine.
4. Release Start Button: Once the engine starts, immediately release the start button. Do not hold the button down after the engine has started.

5. Maintenance

Regular inspection and maintenance of the wiring harness and associated components will ensure reliable operation and extend the lifespan of the system.

• Visual Inspection: Periodically inspect the entire wiring harness for any signs of wear, fraying, cuts, or heat damage.
• Connection Checks: Ensure all electrical connectors are securely seated and free from corrosion. Apply dielectric grease to connections if operating in damp environments.
• Component Cleanliness: Keep the CDI, rectifier, solenoid, and switches clean and free from dirt, mud, and moisture.
• Spark Plug Condition: Inspect the spark plug regularly for wear, fouling, or incorrect gap. Replace as needed.
• Battery Health: Ensure the vehicle's battery is fully charged and in good condition, as a weak battery can affect the electric start system.

6. Troubleshooting

If you encounter issues with your electric start system, refer to the following troubleshooting guide. For complex issues, consult a qualified technician.

6.1 Engine Does Not Crank

• Check Battery: Ensure the battery is fully charged and its terminals are clean and tight.
• Check Key Switch: Verify the key switch is in the 'ON' position.
• Check Kill Switch: Ensure the engine kill switch is in the 'RUN' position.
• Check Solenoid: Listen for a click from the solenoid when pressing the start button. If no click, check solenoid connections and functionality.
• Check Starter Motor: If the solenoid clicks but the engine doesn't crank, the starter motor or its connections may be faulty.

6.2 Engine Cranks But Does Not Start (No Spark)

• Check Spark Plug: Remove the spark plug, reconnect it to the spark plug cap, and ground the plug against the engine block. Crank the engine and look for a spark. If no spark, replace the spark plug.
• Check Ignition Coil: Ensure the ignition coil is properly connected and receiving power.
• Check CDI Unit: A faulty CDI unit can prevent spark. Ensure its connections are secure.
• Check Wiring: Inspect all wiring related to the ignition system for breaks or loose connections.

6.3 Electrical Components Not Functioning (Lights, etc.)

• Check Rectifier: A faulty rectifier can lead to improper battery charging and power supply issues.
• Check Fuses: Some systems may have inline fuses. Locate and check them for continuity.
• Check Ground Connections: Ensure all ground wires are securely attached to a clean, unpainted metal surface on the frame.

7. Specifications

8. Warranty and Support

For warranty information and technical support, please refer to the retailer or manufacturer from whom you purchased this product. Keep your proof of purchase for any warranty claims.