Dolmar MS-245.4 U User Manual (English)

Questions and Answers:

Q
qkellyAug 1, 2025
Why Dolmar MS-245.4 U Brush Cutter engine does not start?
- M
  Misty ThomasAug 1, 2025
  Several factors can prevent your Dolmar Brush Cutter's engine from starting. It could be due to failure to operate the primer pump, so push it 7 to 10 times. Other reasons include low pulling speed of the starter rope (pull strongly), lack of fuel (feed fuel), a clogged fuel filter (clean it), a broken or deteriorated fuel tube (straighten or replace it), or deteriorated fuel (replace with new one, recommended every month). Also check for excessive suction of fuel, detached plug cap (attach securely), contaminated spark plug (clean it), abnormal clearance or other issues with the spark plug (adjust clearance or replace it). If none of these resolve the issue, the carburetor or drive system may be abnormal, requiring professional inspection and maintenance.
A
ashleyderrickAug 6, 2025
What to do if Dolmar Brush Cutter engine stops soon after starting?
- M
  Mary MillerAug 6, 2025
  If your Dolmar Brush Cutter engine stops shortly after starting, it might not be sufficiently warmed up, so perform the warm-up operation. Another cause could be the choke lever being set to “CLOSE” when the engine is warm; set it to “OPEN”. Also, check for a clogged fuel filter (clean it) or a contaminated or clogged air cleaner (clean it). If the problem persists, the carburetor or drive system may be abnormal, requiring professional inspection and maintenance.
G
Gary RyanAug 11, 2025
What to do if Dolmar Brush Cutter blade does not stop immediately?
- M
  Monica RoblesAug 11, 2025
  If the cutter blade on your Dolmar Brush Cutter doesn't stop immediately, the high idling rotation may be the issue, so adjust it. Also, check if the throttle wire is detached and attach it securely. If these steps don't solve the problem, the drive system may be abnormal, requiring professional inspection and maintenance.
J
Jenna DixonAug 16, 2025
How to fix abnormal vibration of Dolmar MS-245.4 U Brush Cutter?
- M
  Miss Michelle Murray MDAug 16, 2025
  Abnormal vibration in your Dolmar Brush Cutter can be caused by several issues. Check for a broken, bent, or worn cutter blade and replace it if necessary. Ensure the cutter blade-tightening nut is securely tightened. Also, verify that the convex part of the cutter blade and cutter blade support fitting are securely attached. If the vibration persists, the drive system may be abnormal, requiring professional inspection and maintenance.
M
Madison OliverAug 21, 2025
What to do if Dolmar Brush Cutter blade does not rotate?
- M
  morganclarkAug 21, 2025
  If the cutter blade on your Dolmar Brush Cutter isn't rotating, first check if the cutter blade-tightening nut is loosened and tighten it securely. Also, inspect for any twigs caught by the cutter blade or dispersion-preventing cover and remove any foreign matter. If the issue continues, the drive system may be abnormal, requiring professional inspection and maintenance.
A
Allison MeyerAug 26, 2025
What to do if Dolmar MS-245.4 U engine does not stop?
- G
  Gina RobbinsAug 26, 2025
  If your Dolmar Brush Cutter engine won't stop, check if the connector is detached and attach it securely. If the issue persists, the electric system may be abnormal, requiring professional inspection and maintenance.

Dolmar MS-245.4 U Specifications

General

Brand	Dolmar
Model	MS-245.4 U
Category	Brush Cutter
Language	English

Summary

Model Identification and Translations

Symbols and Warnings

Safety and Hazard Symbols

Symbols indicating general warnings, personal protective equipment, and hazards.

Operational and Status Symbols

Symbols related to machine operation, starting, stopping, fuel, and recycling.

SAFETY INSTRUCTIONS

General Safety Guidelines

Instructions for safe operation, user qualifications, and general precautions.

Intended Use of the Machine

Specifies the correct applications for the petrol brushcutter.

Personal Protective Equipment (PPE)

Mandatory protective gear required for safe operation.

Starting Up the Brushcutter Safely

Guidelines for safely initiating the brushcutter's operation.

Refuelling Procedures

Handling Fuel Safely

Precautions and safety measures for handling petrol and refuelling.

Storage Period and Conditions

Guidelines for storing fuel and the machine.

Operation and Maintenance

Method of Operation

Instructions on how to correctly operate the brushcutter.

Kickback Prevention and Handling

Guidance on avoiding and managing kickback incidents.

Cutting Tools Usage

Information on selecting and using appropriate cutting tools.

Cutting Tool Maintenance

Basic maintenance requirements for cutting tools.

Safety, First Aid, and Compliance

General Safety Reminders

Final safety points, including not modifying the machine.

First Aid Procedures

Instructions for providing first aid in case of an accident.

Packaging Information

Details regarding the product's packaging materials.

EC Declaration of Conformity

Statement of product compliance with relevant EU directives.

Technical Data (MS-245.4 U/C)

Technical Data (MS-245.4 UE/CE)

Designation of Parts

Handle Mounting Procedures

Bike Handle Assembly

Steps for assembling the handle on bike handle models.

Loop Handle Assembly

Steps for assembling the handle on loop handle models.

Protector Mounting and Usage

Using Genuine DOLMAR Blades/Heads

Ensuring the use of authentic DOLMAR cutting attachments.

Mounting Metal Blade Protector

Instructions for attaching the protector for metal blades.

Mounting Nylon Cutting Head Protector

Instructions for attaching the protector for nylon cutting heads.

Cutter Blade and Nylon Head Installation

Mounting Cutter Blade

Procedure for securely installing the cutter blade.

Mounting Nylon Cutting Head

Procedure for securely installing the nylon cutting head.

Pre-Operation Checks and Oil

Engine Oil Inspection and Refill

Steps for checking and refilling the engine oil level.

Oil Gauge Handling

Proper handling and care of the engine oil gauge.

Fuel Handling and Refueling

Fuel Storage and Handling

Guidelines for safe storage and handling of fuel.

Refueling Safety Precautions

Safety measures to follow during the refueling process.

Operation and Starting Procedures

Correct Machine Handling and Detachment

Proper techniques for handling and detaching the machine.

Cold Start Procedure

Step-by-step guide for starting the engine from cold.

Engine Startup, Stopping, and Adjustment

Startup After Warm-up Operation

Procedure for starting the engine after it has warmed up.

Engine Stopping Procedure

Correct method for safely stopping the engine.

Low-Speed Rotation (Idling) Adjustment

How to adjust the engine's idling speed.

Cutting Tool Resharpening

Guidance on resharpening cutting tools.

Nylon Cutting Head Operation

Nylon Cord Feeding and Operation

Instructions for operating the nylon cutting head and feeding cord.

Replacing the Nylon Cord

Step-by-step guide for replacing the nylon cutting cord.

Servicing Instructions and Engine Oil Replacement

Daily Checkup and Maintenance

Routine checks and maintenance tasks performed daily.

Engine Oil Replacement Procedure

Instructions for the process of replacing engine oil.

Oil and Air Cleaner Maintenance

Engine Oil Disposal and Inspection

Proper disposal of used oil and ongoing inspection requirements.

Air Cleaner Cleaning Procedure

Steps for cleaning the air cleaner element.

Component Maintenance Procedures

Spark Plug and Gear Case Servicing

Maintenance for the spark plug and supplying grease to the gear case.

Fuel System Maintenance

Cleaning and replacing fuel filters and fuel pipes.

General Component Checks and Cleaning

Inspection of bolts, cleaning parts, and replacing gaskets.

Storage and Fault Diagnosis

Long-Term Storage Procedures

Instructions for storing the machine for extended periods.

Fault Diagnosis Overview

Introduction to identifying and diagnosing common machine faults.

Detailed Troubleshooting Steps

Related product manuals

Dolmar MS-246.4 U

80 pages

MS-260 U, MS-330 U, MS-430 U, MS-230 C, MS-260 C, MS-330 C

Dolmar MS-245.4 U User Manual

Table of Contents

Questions and Answers:

Dolmar MS-245.4 U Specifications

Summary

Model Identification and Translations

Symbols and Warnings

Safety and Hazard Symbols

Operational and Status Symbols

SAFETY INSTRUCTIONS

General Safety Guidelines

Intended Use of the Machine

Personal Protective Equipment (PPE)

Starting Up the Brushcutter Safely

Refuelling Procedures

Handling Fuel Safely

Storage Period and Conditions

Operation and Maintenance

Method of Operation

Kickback Prevention and Handling

Cutting Tools Usage

Cutting Tool Maintenance

Safety, First Aid, and Compliance

General Safety Reminders

First Aid Procedures

Packaging Information

EC Declaration of Conformity

Technical Data (MS-245.4 U/C)

Technical Data (MS-245.4 UE/CE)

Designation of Parts

Handle Mounting Procedures

Bike Handle Assembly

Loop Handle Assembly

Protector Mounting and Usage

Using Genuine DOLMAR Blades/Heads

Mounting Metal Blade Protector

Mounting Nylon Cutting Head Protector

Cutter Blade and Nylon Head Installation

Mounting Cutter Blade

Mounting Nylon Cutting Head

Pre-Operation Checks and Oil

Engine Oil Inspection and Refill

Oil Gauge Handling

Fuel Handling and Refueling

Fuel Storage and Handling

Refueling Safety Precautions

Operation and Starting Procedures

Correct Machine Handling and Detachment

Cold Start Procedure

Engine Startup, Stopping, and Adjustment

Startup After Warm-up Operation

Engine Stopping Procedure

Low-Speed Rotation (Idling) Adjustment

Cutting Tool Resharpening

Nylon Cutting Head Operation

Nylon Cord Feeding and Operation

Replacing the Nylon Cord

Servicing Instructions and Engine Oil Replacement

Daily Checkup and Maintenance

Engine Oil Replacement Procedure

Oil and Air Cleaner Maintenance

Engine Oil Disposal and Inspection

Air Cleaner Cleaning Procedure

Component Maintenance Procedures

Spark Plug and Gear Case Servicing

Fuel System Maintenance

General Component Checks and Cleaning

Storage and Fault Diagnosis

Long-Term Storage Procedures

Fault Diagnosis Overview

Detailed Troubleshooting Steps

Related product manuals