Makita EM4350UH - User Manual

Other manuals for Makita EM4350UH

Original Instruction Manual220 pages

Questions and Answers

N
Nicole BrockNov 21, 2025
Why won't my Makita Trimmer engine start?
- R
  Rebecca HarrisonNov 21, 2025
  If your Makita Trimmer's engine won't start, several factors could be the cause. First, ensure the I-O switch is set to OPERATION. Check the fuel level and replenish if necessary. A clogged fuel filter can also prevent starting, so clean it. Inspect the fuel tube for breaks and straighten if needed. If the fuel is old, replace it, as deteriorated fuel makes starting difficult (replace every month). Also, make sure the plug cap is securely attached and the spark plug is clean and properly gapped. If there was excessive suction of fuel, set throttle lever from medium speed to high speed, and pull starter handle until engine starts. Once engine starts, metal blade starts rotating, so pay full attention to metal blade. If engine will not start still, remove spark plug, dry the electrode, and r...
V
Victor ButlerAug 25, 2025
What to do if the metal blade on my Makita Trimmer does not stop immediately?
- D
  Debra GardnerAug 26, 2025
  If the metal blade on your Makita Trimmer doesn't stop immediately, the high idling rotation may be the issue, so adjust it. Check if the throttle wire is detached and attach it securely. For abnormal drive system, it is best to request inspection and maintenance.
A
Ashley CooperAug 26, 2025
What to do if the metal blade on my Makita EM4350UH Brush Cutter does not rotate?
- C
  Christopher ChanAug 27, 2025
  If the metal blade on your Makita Brush Cutter isn't rotating, check for a loosened metal blade-tightening nut and tighten it securely. Also, inspect the blade and dispersion-preventing cover for any caught twigs or foreign matter and remove them.
G
Gilbert DavisAug 27, 2025
What to do if the metal blade on my Makita EM4350UH Brush Cutter does not stop immediately?
- J
  Jennifer HarrellAug 27, 2025
  If the metal blade on your Makita Brush Cutter doesn't stop immediately, the high idling rotation may need adjustment. Also, check whether the throttle wire is detached and attach it securely if needed.
W
William HollandAug 28, 2025
What to do if metal blade does not rotate on Makita Trimmer?
- R
  Richard KempAug 28, 2025
  If the metal blade on your Makita Trimmer isn't rotating, check these items: * The metal blade-tightening nut may be loosened; tighten it securely. * Twigs might be caught by the metal blade or dispersion-preventing cover; remove any foreign matter. * The drive system may be abnormal; make a request for inspection and maintenance.
K
Keith GilesSep 16, 2025
Why won't my Makita Trimmer engine stop?
- L
  lopezmicheleSep 16, 2025
  If the engine of your Makita Trimmer does not stop, it might be due to: * A detached connector; attach it securely. * An abnormal electric system; make a request for inspection and maintenance.
J
jonesmckenzieSep 14, 2025
What to do if Makita Trimmer engine stops soon after starting?
- J
  Jesse ThomasSep 14, 2025
  If your Makita Trimmer's engine stops soon after starting, consider the following possibilities: * The engine might not be sufficiently warmed up; perform a warm-up operation. * The choke lever may be set to “CLOSE” although the engine is warmed up; set it to “OPEN”. * The fuel filter could be clogged; clean it. * The air cleaner might be contaminated or clogged; clean it. * The carburetor may be abnormal; make a request for inspection and maintenance. * The drive system may be abnormal; make a request for inspection and maintenance.
L
Luis PetersenSep 15, 2025
Why does my Makita Trimmer main unit vibrate abnormally?
- V
  victoria52Sep 15, 2025
  Abnormal vibration in your Makita Trimmer can stem from: * A broken, bent, or worn metal blade; replace the metal blade. * A loosened metal blade-tightening nut; tighten it securely. * A shifted convex part of the metal blade and metal blade support fitting; attach securely. * An abnormal drive system; make a request for inspection and maintenance.
P
Patrick JimenezSep 6, 2025
Why does my Makita Brush Cutter main unit vibrate abnormally?
- M
  mcastroSep 6, 2025
  Abnormal vibration in your Makita Brush Cutter can be caused by a broken, bent, or worn metal blade (replace the metal blade); a loosened metal blade-tightening nut (tighten securely); or a shifted convex part of metal blade and metal blade support fitting (attach securely).
A
Amy BaileySep 3, 2025
Why won't my Makita Brush Cutter engine start?
- C
  Charles StewartSep 4, 2025
  The engine of your Makita Brush Cutter might not be starting due to several reasons: the I-O switch is set to STOP (set it to OPERATION); failure to operate primer pump (push 7 to 10 times); low pulling speed of starter rope (pull strongly); lack of fuel (feed fuel); clogged fuel filter (clean it); broken fuel tube (straighten fuel tube); deteriorated fuel (replace with new fuel, recommended every month); excessive suction of fuel (set throttle lever from medium speed to high speed, and pull starter handle until engine starts); detached plug cap (attach securely); contaminated spark plug (clean); abnormal clearance of spark plug (adjust clearance); other abnormality of spark plug (replace).

Summary

Makita Petrol Brushcutter Overview

Model Identification

Identifies the specific Makita petrol brushcutter models covered by this manual.

Important Safety Notice

Crucial instruction to read the manual before operation and observe safety regulations.

Understanding Makita Brushcutter Symbols

Safety Warning Symbols

Visual indicators and their meanings for safe operation and hazards.

Protective Gear Icons

Symbols indicating required personal protective equipment for safe usage.

Comprehensive Safety Instructions

General Operation Guidelines

Essential rules for safe operation and user responsibility.

Intended Use and Prohibited Activities

Defines the operational scope and prohibited uses to prevent damage or injury.

Mandatory Personal Protective Equipment (PPE)

Details mandatory protective gear for user safety during operation.

Pre-Operation Safety Checks

Steps to ensure the brushcutter is safe and ready for use before starting.

Safe Operation and Refueling Procedures

Safe Starting and Operation Practices

Procedures for safe engine starting and during operation.

Fuel Handling and Refueling Safety

Critical safety steps and guidelines for handling and refueling the machine.

Brushcutter Operation and Maintenance

Operating Methods and Techniques

Guidance on how to operate the brushcutter safely and effectively.

Cutting Tool Selection and Use

Information on choosing and using appropriate cutting tools safely.

Kickback Prevention Strategies

Details the phenomenon of kickback and strategies to prevent it.

Vibration Health Risks and Mitigation

Explains vibration-related health risks and methods to minimize them.

Essential Maintenance Advice

Outlines essential maintenance practices for longevity and safety.

Final Safety, First Aid, and Compliance

Tool Care, Storage, and Environmental Notes

Final advice on tool care, storage, and environmental considerations.

Accident First Aid Response

Guidelines for immediate action and information to provide in case of accidents.

EC Declaration of Conformity Details

Manufacturer's declaration of compliance with relevant European directives and standards.

Technical Data for Makita Brushcutters

EM4351 UH, EM4350 UH, EM4350 LH Specifications

Comprehensive data including dimensions, weight, engine specs, vibration, and noise levels for each model.

Makita Brushcutter Parts Identification

Component Identification Diagram and List

Visual guide and list identifying each component of the brushcutters.

Handle Assembly Instructions

Attaching Handle (EM4351 UH;EM4350 UH)

Procedures for correctly attaching the handle assembly to specific brushcutter models.

Attaching Loop Handle (EM4350 LH)

Steps involved in fitting the loop-style handle to the EM4350LH brushcutter.

Protector Installation Guide

Protector Combination Rules

Rules for selecting and fitting the correct protector for the cutting tool.

Compatible Protector Models

Illustrates compatible protectors for different cutting blades and nylon heads.

Protector Attachment Details

Securing Metal Blade Protector

Detailed steps for securely fastening the protector onto the metal blade assembly.

Fitting Nylon Head Protector

Procedure for attaching the specific protector designed for the nylon cutting head.

Installing Cutting Attachments

Pre-Installation Safety and Checks

Preparatory steps and safety warnings before attaching cutting attachments.

Metal Blade Installation Procedure

Instructions for securely installing a metal cutting blade onto the brushcutter shaft.

Nylon Cutting Head Installation

Steps for attaching the nylon cutting head, including orientation and securing methods.

Engine Oil Checks and Refills

Checking Engine Oil Level

Procedure for verifying the engine oil level using the oil indicator.

Adding Engine Oil

Guide on how to add the correct type and amount of engine oil.

Engine Oil Replacement Steps

Instructions for draining old oil and refilling with new oil.

Fuel and Oil Handling Precautions

Post-Oil Refill Cleanup

Instruction to clean any spilled oil immediately after refilling.

Fuel Safety and Storage Guidelines

Safety guidelines for handling and storing fuel and the machine.

Safe Refueling Process

Step-by-step instructions for safely refueling the brushcutter's fuel tank.

Machine Handling and Harness Use

Adjusting the Shoulder Harness

Guidance on properly fitting and adjusting the shoulder harness for comfortable operation.

Safely Releasing the Brushcutter

Procedures for safely removing the brushcutter from the operator's harness.

Hanging Ring Safety Limits

Information on the safe use and weight limits of the machine's hanging ring.

Starting and Stopping Operations

Pre-Start Handle Positioning

Importance of correct handle positioning before engine ignition to prevent accidents.

Cold Start Engine Procedure

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

Engine Starting: Recoil and Warm Start

Using the Recoil Starter

Instructions for using the recoil starter to initiate the engine.

Choke Adjustment and Warm-up

Steps for adjusting the choke and warming up the engine after it starts.

Warm Engine Start Process

Guide for starting the engine when it is already warm or has been recently used.

Stopping, Idle Speed, and Tool Care

Engine Shutdown Procedure

Instructions for safely shutting down the brushcutter's engine.

Idle Speed Adjustment Guide

Guide for checking and adjusting the engine's idle speed for optimal performance.

Cutting Tool Sharpening Warnings

Precautions and methods for maintaining the sharpness of cutting tools.

Nylon Cutting Head Operation Tips

Instructions on operating the nylon cutting head and feeding the trimmer line.

Replacing Nylon Cord (Bump & Feed)

Bump & Feed Cord Replacement Steps

Step-by-step guide for replacing the nylon trimmer line on the Bump & Feed head.

Replacing Nylon Cord (Ultra Auto)

Ultra Auto Cord Replacement Guide

Step-by-step guide for replacing the nylon trimmer line on the Ultra Auto head.

Ultra Auto Nylon Head Reassembly

Final Assembly of Ultra Auto Head

Final steps for feeding nylon lines and securing the cover of the Ultra Auto head.

Routine Servicing and Oil Changes

Daily Maintenance Checks

Routine checks and minor maintenance tasks to be performed daily.

Engine Oil Change Procedure

Detailed guide on how to safely drain and refill engine oil.

Air Cleaner Maintenance and Oil Disposal

Used Engine Oil Handling

Guidelines for environmentally sound disposal of used engine oil.

Cleaning the Air Cleaner Assembly

Detailed process for cleaning the air cleaner components for optimal engine performance.

Spark Plug, Gear Grease, and Fuel Filter

Spark Plug Maintenance

Instructions for inspecting, cleaning, adjusting, or replacing the spark plug.

Gear Case Lubrication Schedule

Guidance on lubricating the gear case with appropriate grease at specified intervals.

Fuel Filter Maintenance

Steps for maintaining the fuel filter to ensure proper fuel delivery.

Component Replacement and Storage

Fuel Pipe and Fastener Integrity Checks

Guidelines for replacing the fuel pipe and checking fasteners for tightness and damage.

Parts Cleaning and Gasket Replacement

Advice on cleaning external parts and replacing gaskets when necessary.

Long-Term Storage Preparation

Comprehensive instructions for preparing the brushcutter for extended periods of non-use.

Brushcutter Maintenance Schedule

Periodic Maintenance Checklist

A comprehensive schedule outlining required maintenance at different operating hour intervals.

Troubleshooting Common Issues

Problem Diagnosis and Solutions

A guide to diagnosing and resolving common operational problems with the brushcutter.

Manufacturer Information

Makita Corporation Contact Details

Information about the manufacturer, Makita Corporation, including its location and website.

Makita EM4350UH Specifications

General

Power source	Gasoline
Cordless	Yes
Engine power	2.1 hp
Product color	Black, Blue
Number of strokes	4
Fuel tank capacity	0.62 L
Engine displacement	43 cm³
Cutting diameter (max)	- mm