Makita DUR191U - User Manual

Questions and Answers

M
Michael WilliamsSep 8, 2025
What to do if my Makita DUR191U Trimmer motor does not run?
- A
  Alicia DavisSep 8, 2025
  If the motor of your Makita Trimmer doesn't start, possible causes include: the battery cartridge might not be installed—ensure it is properly installed. The battery may be under voltage—try recharging it, and if that doesn't work, replace the battery. If these steps don't resolve the issue, the drive system may not be working correctly.
M
Melissa RodriguezAug 23, 2025
Why my Makita DUR191U Trimmer motor does not run?
- A
  Anthony TranAug 23, 2025
  If your Makita Trimmer's motor does not run, it could be due to several reasons: * The battery cartridge might not be properly installed. Ensure it is correctly installed. * There may be a battery issue, such as undervoltage. Try recharging the battery. If it remains ineffective, replace the battery. * The drive system may not be functioning correctly, in that case, consult your local authorized service center for repair.
C
Christopher HammondAug 25, 2025
What to do if the cutting tool does not rotate on Makita Trimmer?
- M
  Marie LaneAug 25, 2025
  If the cutting tool of your Makita Trimmer does not rotate, immediately stop the machine. A foreign object, like a branch, might be jammed between the guard and the cutting tool. Remove any such object. If the issue persists, the drive system may not be working correctly.
E
Elizabeth BoyleAug 27, 2025
Why does my Makita Trimmer motor stop after a little use?
- J
  Judy ArnoldAug 27, 2025
  Your Makita Trimmer may stop running shortly after starting due to: * Low battery charge: Recharge the battery, and if that doesn't work, replace it. * Overheating: Stop using the tool and allow it to cool down.
K
kristine16Aug 27, 2025
What to do if Makita DUR191U Trimmer cutting tool and motor cannot stop?
- W
  wrightjenniferAug 27, 2025
  If the cutting tool and motor of your Makita Trimmer cannot be stopped, remove the battery immediately! The cause may be electric or electronic malfunction. Remove the battery and ask your local authorized service center for repair.
M
Mr. Stephen TurnerSep 22, 2025
How to fix abnormal vibration in my Makita DUR191U?
- L
  Leslie HendricksSep 22, 2025
  Abnormal vibration in your Makita Trimmer could be due to one end of the nylon cord being broken. To resolve this, tap the nylon cutting head against the ground while it is rotating to feed the cord.
N
nancylaneSep 16, 2025
What to do if my Makita DUR191U cutting tool does not rotate?
- C
  cherylhoffmanSep 16, 2025
  If the cutting tool of your Makita Trimmer doesn't rotate, stop the machine immediately and check for a foreign object, such as a branch, jammed between the guard and the cutting tool. Remove any obstruction.
M
Mary BellSep 18, 2025
Why doesn't my Makita DUR191U reach maximum RPM?
- V
  Valerie CollierSep 18, 2025
  If your Makita Trimmer isn't reaching its maximum RPM, it could be due to: * Improper battery installation. Ensure the battery cartridge is correctly installed as described in the manual. * Dropping battery power. Recharge the battery, and if that's ineffective, replace it.
A
Angela ReedSep 7, 2025
Why Makita Trimmer does not reach maximum RPM?
- E
  Emily GibsonSep 7, 2025
  If your Makita Trimmer does not reach maximum RPM, consider the following: * Improper battery installation: Install the battery cartridge as described in the manual. * Dropping battery power: Recharge the battery, and if that's ineffective, replace it. * Faulty drive system: Seek repair from your local authorized service center.
M
Maria SmithSep 4, 2025
What to do if the Makita Trimmer cutting tool and motor cannot stop?
- L
  Linda MedinaSep 4, 2025
  If the cutting tool of your Makita Trimmer and the motor won't stop, immediately remove the battery. This indicates an electric or electronic malfunction, and you should seek repair from your local authorized service center.

Summary

Specifications

Model Specifications

Detailed specifications for each grass trimmer model, including handle type, speed, and dimensions.

Applicable Battery and Charger

Safety Warnings

General Power Tool Safety

Provides essential safety warnings applicable to all power tools, covering work area and electrical safety.

Personal Safety Precautions

Outlines crucial personal safety measures, including protective equipment and maintaining alertness.

Important Safety Instructions

Intended Use and General Handling

Defines the tool's purpose and general safe handling guidelines, including lending and care.

Work Area and Electrical Safety

Covers safety for the operating environment, electrical precautions, and preventing unintentional starts.

Putting into Operation

Pre-Operation Checks and Assembly

Steps before operating, including assembly, checks, and adjustments for safe use.

Safe Operation Practices

Guidelines for safe handling, footing, environmental awareness, and preventing fatigue during operation.

Troubleshooting

Problem Diagnosis and Solutions

Common issues, their probable causes (malfunctions), and recommended remedies.

Summary

Specifications

Model Specifications

Detailed specifications for each grass trimmer model, including handle type, speed, and dimensions.

Applicable Battery and Charger

Safety Warnings

General Power Tool Safety

Provides essential safety warnings applicable to all power tools, covering work area and electrical safety.

Personal Safety Precautions

Outlines crucial personal safety measures, including protective equipment and maintaining alertness.

Important Safety Instructions

Intended Use and General Handling

Defines the tool's purpose and general safe handling guidelines, including lending and care.

Work Area and Electrical Safety

Covers safety for the operating environment, electrical precautions, and preventing unintentional starts.

Putting into Operation

Pre-Operation Checks and Assembly

Steps before operating, including assembly, checks, and adjustments for safe use.

Safe Operation Practices

Guidelines for safe handling, footing, environmental awareness, and preventing fatigue during operation.

Troubleshooting

Problem Diagnosis and Solutions

Common issues, their probable causes (malfunctions), and recommended remedies.

This document is an instruction manual for the Makita Cordless Grass Trimmer models DUR190U, DUR190L, DUR191U, and DUR191L. It provides detailed information on the device's specifications, safety warnings, operation, and maintenance.

Function Description

The Makita Cordless Grass Trimmer is a power tool designed for cutting grass, weeds, bushes, and undergrowth. It is not intended for other purposes such as edging or hedge cutting. The tool operates on a D.C. 18V battery and features different cutting attachments depending on the model and application, including 3-tooth blades, 4-tooth blades, nylon cutting heads, and plastic blades. It incorporates a tool/battery protection system that automatically cuts off power to the motor under conditions like overload, overheating, or low battery capacity to extend tool and battery life. The trimmer also includes a reverse rotation function specifically for removing entangled weeds and debris from the cutting tool.

Important Technical Specifications

Model Variations:

DUR190U: Bike handle
DUR190L: Loop handle
DUR191U: Bike handle
DUR191L: Loop handle

No Load Speed:

Speed 3: 6,000 min⁻¹
Speed 2: 5,100 min⁻¹
Speed 1: 3,500 min⁻¹
ADT (Automatic Torque Drive Technology): 3,500 - 6,000 min⁻¹ (optimizes speed and torque for cutting conditions)

Overall Length (without cutting tool): 1,775 mm

Nylon Cord Diameter: 2.0 - 2.4 mm

Applicable Cutting Tool and Cutting Diameter:

3-tooth blade (P/N 191J34-5): 230 mm
4-tooth blade (P/N 729025-2): 230 mm
Nylon cutting head (P/N 126674-0): 300 mm
Plastic blade (P/N 126642-3): 230 mm

Rated Voltage: D.C. 18 V

Net Weight (depending on model and attachments):

DUR190U: 3.1 - 3.4 kg
DUR190L: 2.9 - 3.2 kg
DUR191U: 3.4 - 3.7 kg
DUR191L: 3.2 - 3.5 kg

Applicable Battery Cartridges: BL1815N, BL1820, BL1820B, BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860B. Applicable Chargers: DC18RC, DC18RD, DC18RE, DC18SD, DC18SE, DC18SF, DC18SH. Recommended Battery Adapter: PDC01.

Noise Emission Levels (LPA / LWA) and Vibration Levels (an,w):

4-tooth blade:
- Sound Pressure Level (LPA): 77.0 dB(A) (Uncertainty K: 3.9 dB(A))
- Sound Power Level (LWA): 91.6 dB(A) (Uncertainty K: 2.4 dB(A))
- Vibration (an,w): ≤ 2.5 m/s² (Uncertainty K: 1.5 m/s²)
Nylon cutting head:
- Sound Pressure Level (LPA): 74.0 dB(A) (Uncertainty K: 1.9 dB(A))
- Sound Power Level (LWA): 87.1 dB(A) (Uncertainty K: 0.9 dB(A))
- Vibration (an,w): ≤ 2.5 m/s² (Uncertainty K: 1.5 m/s²)
Plastic blade:
- Sound Pressure Level (LPA): 75.6 dB(A) (Uncertainty K: 1.3 dB(A))
- Sound Power Level (LWA): 85.9 dB(A) (Uncertainty K: 2.1 dB(A))
- Vibration (an,w): ≤ 2.5 m/s² (Uncertainty K: 1.5 m/s²)

Usage Features

Starting and Stopping:

The tool is turned on by tapping the main power button and off by pressing and holding it until the speed indicator goes off.
A lock-off lever prevents accidental pulling of the switch trigger. To start, grasp the handle to release the lever and then pull the trigger. Release the trigger to stop.

Speed Adjustment:

The tool speed can be selected by tapping the main power button, cycling through different speed levels.
ADT (Automatic Torque Drive Technology) automatically adjusts rotation speed and torque based on grass conditions.

Battery Management:

Battery cartridges are installed by aligning the tongue with the groove and pushing until it clicks, and removed by sliding the button and pulling out.
A red indicator on the battery cartridge shows if it's not fully locked.
Battery cartridges with an indicator show remaining capacity via indicator lamps when the check button is pressed.

Cutting Tool Installation:

The manual details installation of cutter blades, nylon cutting heads, and plastic blades.
For cutter blades, ensure the arrows on the blade and protector point in the same direction.
A spindle lock button is used to secure the cutting tool during installation and removal.
A hex wrench (supplied) can be used to lock the spindle for easier tool changes.

Handle and Hanger Adjustment:

For DUR190U and DUR191U models, the handle and hanger position can be adjusted to achieve a comfortable working position, with specific ranges for hanger position from the ground (≥750mm) and horizontal distance between hanger and unguarded part of the cutting tool (100-300mm).
For DUR190L and DUR191L models, the handle and hanger can also be adjusted for comfort.

Attachment Pipe Mounting (DUR191U and DUR191L only):

The attachment pipe is mounted to the power unit by turning a lever, pulling up a joint cover, inserting the pipe, and then turning the lever back to secure it.

Protector and Barrier:

The tool must always be used with the guard (protector) in place to prevent serious personal injury.
A barrier (country-specific for DUR190L and DUR191L) is attached to the handle as a safety part to prevent contact with the cutting blade.

Shoulder Harness:

A shoulder harness is provided to prevent fatigue and ensure secure handling. It connects to the tool's hanger and features a quick-release mechanism.

Operation Guidelines:

Always position the tool on the right-hand side for maximum control.
Maintain a safe distance of at least 15m from bystanders and animals.
Inspect the work area for solid objects before operation to prevent kickback.
Never cut above waist height.
Wait for the cutting attachment to reach constant speed before starting.
When using a cutting blade, swing the tool from right to left like a scythe.
Hold the tool with both hands by insulated gripping surfaces.
Do not start the tool if the cutting tool is tangled.
Ensure the cutting tool is not touching the ground or other obstacles before starting.
For nylon cutting heads (bump & feed type), tap the head against the ground while rotating to feed out the cord.

Maintenance Features

General Maintenance:

Always switch off the tool and remove the battery cartridge before any inspection, maintenance, or adjustment.
Keep cutting tools sharp and clean.
Regularly check for misalignment, binding, breakage, or other conditions affecting operation.
Clean dust and dirt off the tool; avoid using gasoline, benzine, thinner, or alcohol.
Tighten all screws and nuts after each use.
Do not attempt repairs not described in the manual; contact an authorized service center.
Use only genuine Makita spare parts and accessories.

Battery Cartridge Maintenance:

Recharge only with the specified charger.
Stop operation and charge the battery when tool power decreases.
Avoid overcharging.
Charge at room temperature (10 °C - 40 °C).
Allow hot battery cartridges to cool before charging.
Charge if not used for long periods (more than six months).
Do not disassemble, short-circuit, expose to water/rain, or store in high temperatures (above 50 °C).
Do not incinerate damaged or worn-out battery cartridges.
Do not use damaged batteries.
Remove the battery from the tool if not used for a long period.

Cutting Tool Maintenance:

Inspect cutting attachments frequently for cracks or damage and replace immediately if found.
When handling cutter blades, wear protective gloves and use the blade cover.
Ensure cutter blades are well-polished and free of cracks or breakage.
Replace nylon cord if it is no longer feeding.
When replacing the nylon cord, remove the nylon cutting head from the tool and ensure the cover is properly secured.

Troubleshooting:

The manual provides a troubleshooting guide for common issues such as the motor not running, stopping after short use, not reaching maximum RPM, cutting tool not rotating, abnormal vibration, and cutting tool/motor not stopping.
It suggests probable causes (e.g., battery not installed, low charge, overheating, foreign objects) and remedies (e.g., install/recharge battery, remove foreign object, contact service center).