1. Introduction
This manual provides essential information for the safe and efficient operation, assembly, maintenance, and troubleshooting of your Makita ELM3720 Electric Mower. Please read this manual thoroughly before using the product to ensure proper handling and to prevent injury or damage.
2. Safety Instructions
Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury. Keep this manual for future reference.
General Safety
- Read all instructions carefully before operation.
- Wear appropriate personal protective equipment (PPE), including eye protection, sturdy footwear, and long trousers.
- Keep children and bystanders away from the operating area.
- Do not operate the mower in wet conditions or rain.
Electrical Safety
- Ensure the power supply matches the specifications on the mower's rating plate.
- Use only extension cords suitable for outdoor use and rated for the mower's power requirements.
- Inspect the power cord for damage before each use. Do not use if damaged.
- Always disconnect the power supply before cleaning, maintenance, or if the mower is left unattended.
Operation Safety
- Clear the area of debris (stones, sticks, wires) before mowing.
- Never place hands or feet near rotating parts.
- Mow across the face of slopes, never up and down. Exercise extreme caution when changing direction on slopes.
- Do not lift or carry the mower while the motor is running.
3. Package Contents
Verify that all items are present and undamaged upon unpacking:
- Makita ELM3720 Electric Mower Main Unit
- Grass Collection Box (assembly required)
- Handle Assembly (upper and lower sections)
- Cable Clips
- User Manual
4. Setup and Assembly
Follow these steps to assemble your Makita ELM3720 Electric Mower:
4.1 Handle Assembly
- Attach the lower handle section to the mower body using the provided bolts and knobs. Ensure it is securely fastened.
- Connect the upper handle section to the lower handle section. Secure with the quick-release levers or bolts.
- Route the power cable along the handle and secure it with the cable clips to prevent snagging.

The Makita ELM3720 Electric Mower with its handle assembly partially attached, showing the main body and grass collection bag.

The fully assembled Makita ELM3720 Electric Mower, ready for operation, showcasing its compact design.

Side view of the Makita ELM3720 Electric Mower, highlighting the handle and grass collection bag.

Close-up of the handle adjustment mechanism on the Makita ELM3720 Electric Mower, indicating how to fold or adjust the handle for storage or use.
4.2 Grass Collection Box Assembly
- Assemble the grass collection box according to the diagrams in the separate assembly sheet (if provided).
- Lift the rear discharge flap of the mower and hook the grass collection box onto the mower body. Ensure it is securely seated.

The detachable grass collection box for the Makita ELM3720 Electric Mower, featuring the Makita logo.

The grass collection box attached to the rear of the Makita ELM3720 Electric Mower.
5. Operating Instructions
5.1 Adjusting Cutting Height
The Makita ELM3720 offers 3 cutting height positions. To adjust, locate the height adjustment lever on the side of the mower body. Move the lever to the desired position (1, 2, or 3) to raise or lower the cutting blade.

Close-up of the cutting height adjustment lever on the Makita ELM3720 Electric Mower, with settings indicated by numbers.
5.2 Starting the Mower
- Ensure the mower is on a flat, stable surface.
- Connect the mower's power cord to a suitable outdoor extension cord, and then to a grounded power outlet.
- Press and hold the safety button on the handle.
- While holding the safety button, pull the switch lever towards the handle. The motor will start.
- Release the safety button once the motor is running.

Detail of the power switch and control handle on the Makita ELM3720 Electric Mower, showing the safety button and power lever.
5.3 Mowing Techniques
- Mow in straight, overlapping lines to ensure even coverage.
- Avoid overloading the motor by cutting excessively long or wet grass. Raise the cutting height if necessary.
- Regularly check and empty the grass collection box to maintain optimal performance.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your mower. Always disconnect the power supply before performing any maintenance.
6.1 Cleaning
- After each use, clean the mower deck and grass collection box.
- Use a brush or damp cloth to remove grass clippings and dirt. Do not use water jets or high-pressure cleaners.
- Ensure all ventilation openings are clear of debris.
6.2 Blade Care
Inspect the cutting blade regularly for sharpness and damage. A dull or damaged blade can lead to poor cutting performance and increased motor strain.

Underside view of the Makita ELM3720 Electric Mower, showing the rotary cutting blade and wheel assembly.
- If the blade is dull, it can be sharpened by a qualified service technician.
- If the blade is bent or cracked, it must be replaced immediately with a genuine Makita replacement blade.
6.3 Storage
- Clean the mower thoroughly before storing.
- Fold the handle for compact storage (refer to Section 4.1).
- Store the mower in a dry, secure place, out of reach of children.
7. Troubleshooting
Refer to this section for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Mower does not start | No power supply Safety button/lever not engaged Thermal overload activated | Check power connection and outlet Ensure safety button is pressed before pulling lever Allow mower to cool down for 15-20 minutes |
| Poor cutting performance | Dull or damaged blade Grass collection box full Cutting height too low for grass type | Sharpen or replace blade Empty grass collection box Adjust cutting height higher |
| Excessive vibration | Damaged or unbalanced blade Loose components | Inspect blade for damage; replace if necessary Check all fasteners and tighten as needed |
If the problem persists after attempting these solutions, please contact Makita customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Makita |
| Model | ELM3720 |
| Power Source | Corded Electric |
| Material | Plastic |
| Color | r.blue |
| Style | Rotary |
| Item Weight | 11.6 Kilograms (25.5 pounds) |
| Cutting Width | 39 Centimeters |
| Number of Cutting Positions | 3 |
| Operation Mode | Automatic |
| UPC | 088381859127 |
| Manufacturer | MAKITA |
| Product Dimensions | 52.36 x 163.39 x 350.39 inches |
9. Warranty and Support
Makita products are manufactured to high quality standards. For information regarding warranty coverage, service, or technical support, please refer to the warranty card included with your product or visit the official Makita website. Keep your purchase receipt as proof of purchase.
For further assistance, you may contact Makita customer service directly via their official channels.





