Mac allister MLMP450HP40

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Summary

Getting Started Guide

Safety Warnings

Safety warnings for petrol powered lawnmowers, read carefully before use.

Initial Setup Steps

Guidance on initial setup, product familiarisation, and quick start procedures.

Safety Information

Safe Operation Guidelines

Safe operation guidelines, including mowing practices and hazard avoidance.

Fuel Handling Procedures

Safe procedures for refuelling the lawnmower with petrol and engine oil.

Vibration and Noise Reduction

Tips to minimize exposure risks from vibration and noise during operation.

Emergency Procedures

Guidance on recognizing and handling risks, and procedures for malfunctions.

Understanding Residual Risks

Potential risks of injury and damage that remain even with safety requirements.

Product Symbols Explained

Explanations of symbols and abbreviations found on the product and in instructions.

Product Overview

Component Identification

Diagram and list of all parts of the lawnmower for identification.

Technical Specifications

Detailed technical data including dimensions, engine, sound, and vibration levels.

Unpacking Instructions

Instructions for unpacking the product and checking its contents for completeness and damage.

Before You Start

Assembly and Handlebar Setup

Step-by-step instructions for assembling the lawnmower, focusing on handle bars.

Grass Catcher Attachment

Instructions for attaching and using the grass catcher, including its indicator.

Fuel and Oil Preparation

Guidance on filling the lawnmower with the correct fuel and engine oil.

Detailed Fueling Guide

Detailed instructions for filling the fuel tank with unleaded petrol.

Detailed Engine Oil Guide

Detailed instructions for filling the engine with the correct type and amount of oil.

Quick Start Guide

Operating Controls Identification

Identification and function of the main operating controls on the lawnmower.

Setup Checklist

Overview of initial setup steps: assemble, adjust, add fuel, add oil.

Engine Starting Procedure

Steps for starting the lawnmower engine, including priming and using the starter.

Engine Stopping Procedure

Procedure for safely stopping the lawnmower engine and blade.

In More Detail

Product Functions Explained

Explanation of the lawnmower's intended use and primary functions.

Brake Bar Operation

Operation of the brake bar for starting and stopping the engine.

Recoil Starter Usage

How to use the recoil starter handle to start the engine.

Grass Catcher Use and Emptying

Detailed instructions on using, emptying, and cleaning the grass catcher.

Mulching Insert Installation

Instructions for installing and using the mulching insert for grass clippings.

Cutting Height Adjustment

How to adjust the cutting height of the lawnmower for different grass conditions.

General Operation Tips

Guidelines for safe and effective operation of the lawnmower.

Operation

Starting and Stopping the Engine

Detailed steps for starting and stopping the lawnmower engine.

Mowing Techniques

Best practices for mowing lawns, including safety and technique.

Mulching Guide

Techniques and tips for effective mulching with the lawnmower.

Post-Operation Procedures

Procedures for switching off, cleaning, and storing the lawnmower.

Care and Maintenance

Underbody and Cutting Device Care

Cleaning, inspection, and replacement of the cutting device and underbody.

Grass Catcher Maintenance

Inspection and cleaning of the grass catcher for optimal performance.

Wire Inspection

Checking the condition and performance of the lawnmower's wires.

Engine Maintenance Reference

Reference to the engine handbook for maintenance and care of the engine.

Storage Guidelines

Instructions for safely storing the lawnmower in a dry, frost-free place.

Transportation Guidelines

Guidelines for safely transporting the lawnmower.

Troubleshooting

Engine Start Issues

Troubleshooting steps for when the engine fails to start.

Engine Stopping Issues

Troubleshooting steps for when the engine stops unexpectedly during operation.

Engine Power Loss Issues

Diagnosing and resolving issues with difficult engine starting or power loss.

Erratic Engine Operation

Solutions for engine operation that is unstable or irregular.

Poor Engine Idling

Troubleshooting steps for poor engine idling performance.

Engine Skipping at High Speed

Solutions for engine skipping or misfiring at high speeds.

Engine Overheating Solutions

Diagnosing and resolving engine overheating issues.

Mowing Result Issues

Addressing issues that lead to poor mowing results.

Vibration, Noise, Exhaust Problems

Troubleshooting excessive vibration, noise, or exhaust problems.

This document describes the Mac Allister MLMP450HP40 Petrol Lawnmower, a 125 cc, 1.7 kW hand-push lawnmower designed for domestic garden use. It is intended for mowing grass and not for unusually high, dry, or wet grass, shredding leaves, or mulching. For safety, it is crucial to read the entire instruction manual before operation.

Function Description

The MLMP450HP40 is a petrol-powered lawnmower designed for cutting grass in domestic gardens. It features a cutting device (blade) that rotates to cut grass, a grass catcher for collecting clippings, and a mulching insert for returning finely cut grass to the lawn. The engine is started using a recoil starter handle, and operation is controlled via a brake bar.

Brake Bar (2): This bar must be pulled towards the handle (1) and held in position to start and operate the engine. Releasing the brake bar stops the engine and the cutting device automatically within a few seconds. Regular checks are required to ensure the brake bar and its wire (4) operate smoothly.

Recoil Starter: The recoil starter handle (22) is located at the rear of the engine. To start, the brake bar (2) is pulled, and the recoil starter handle is pulled rapidly until the engine starts. It should be allowed to return slowly and in a controlled manner.

Grass Catcher (20): The product is equipped with a grass catcher to collect clippings. It has an indicator (20b) that shows the volume. When the hatch (20b) is open, there is enough space; when closed, the catcher is full and needs emptying. The grass catcher is attached to the rear discharge chute (24).

Mulching Insert (27): For mulching, the mulching insert is inserted into the rear discharge chute (24), with the unlock button (27a) snapping into place. Mulching involves cutting grass clippings very fine and distributing them back onto the lawn as nutrients.

Cutting Height Adjustment: The cutting height can be adjusted between 25-75 mm using a lever (16) that is pulled towards the wheel (13) and then moved forward or backward. It is important to ensure the lever engages between two prongs.

Primer (10): Located on the air filter case (11), the primer is used to start the product when the engine is cold. It should be pressed three to five times before starting.

Important Technical Specifications

Dimensions: Approx. 1250 x 505 x 985 mm
Machine mass (empty tanks): Approx. 24.2 kg
Fuel tank capacity: 800 ml (cm³)
Petrol type: #95, unleaded
Engine oil capacity: 470 ml (cm³)
Engine oil type: 4-stroke engine oil (e.g., SAE 10W-30)
Specific fuel consumption at max. engine power: 397 g/kWh
Fuel consumption at max. engine power: 1.15 l/h
Cutting width: 40 cm
Cutting height: 25-75 mm
Grass catcher volume: 50 l
Engine model: B&S450E, 08P5
Engine type: Air cooled, 4-stroke engine
Engine displacement: 125 cm³
Maximum operating engine speed (rotational frequency): 2800 min⁻¹
Nominal power: 1.7 kW
Spark plug type: QC12YC
Spark plug gap: 0.51 mm
Sound pressure level at operator's position Lpa: 85.1 dB(A)
Sound power level Lwa: 93.5 dB(A)
Guaranteed sound power level Lwa (acc. to 2000/14/EC amended by 2005/88/EC): 96 dB(A)
Hand arm vibration aw: 6.12 m/s²

Usage Features

Assembly: The product must be fully assembled before operation. This involves unfolding the handle bars (3, 5), fixing them with locking knobs (6a) and mounting sets (18), and attaching the grass catcher (20). The spark plug connector (12) must be disconnected during assembly and reconnected afterwards.

Fuel and Engine Oil: The product is equipped with a 4-stroke engine and requires proper fuel and engine oil to be added separately before operation. Petrol is highly flammable, and refuelling should be done outdoors without smoking. The fuel tank should not be overfilled. Engine oil level must be checked frequently using the dipstick, and good-quality engine oil should be used.

Operation:

Always operate the engine in a well-ventilated space to avoid carbon monoxide fumes.
Mow only in daylight or good artificial light.
Avoid operating when tired, ill, or under the influence of alcohol/drugs.
Avoid wet grass, which can cause clippings to stick and lead to slipping.
Maintain sure footing on slopes; mow across slopes, not up and down.
Do not mow excessively steep slopes or near drop-offs.
Use extreme caution when reversing or pulling the product towards you.
Stop the cutting device when tilting for transport or crossing non-grass surfaces.
Never operate without defective guards or safety devices (deflectors, grass catchers).
Do not change engine governor settings or overspeed the engine.
Start the engine with feet well away from the cutting device(s).
Do not tilt the product when starting, unless necessary for starting, and then only lift the part away from the operator.
Keep hands and feet clear of rotating parts and the discharge opening.
Stop the engine and disconnect the spark plug connector before clearing blockages, checking, cleaning, or working on the product, after striking a foreign object, or if abnormal vibration occurs.
Reduce throttle setting during shutdown and turn off fuel if a shut-off valve is present.
Never touch hot surfaces like the exhaust pipe or engine.
Ensure the air intake is clear of dust, dirt, gases, and fumes.

Mowing:

Clear the lawn of stones, sticks, wire, and other objects.
Do not cut more than one-third of the grass length for a healthy lawn.
Push the product slowly forward; the self-propelled function can be used for assistance.
Mow in slight overlapping rows, preferably straight lines.
Circle around flower beds.
Empty the grass catcher regularly.
If extensive vibration occurs, switch off the engine and inspect for damage.

Maintenance Features

General Cleaning:

Clean the product with a damp cloth and mild soap after each use.
Clean air vents (9) after every use.
Remove stubborn dirt with high-pressure air (max. 3 bar).
Do not use chemical, alkaline, abrasive, or aggressive detergents.
Inspect for worn or damaged parts before each use and replace as necessary.

Underbody and Cutting Device (23):

Wear protective gloves when working near the cutting device.
Use proper tools (e.g., a wooden stick) to remove debris; never use bare hands.
Only use original spare parts for replacement; the cutting device must be replaced with identification no. DAYE 26300100401.
Replacement of the cutting device should be done by an experienced user.
Rework or sharpening blades is not recommended unless done by a repair service.
Jack up the product for inspection/work on the cutting device to prevent fuel and oil leakages.
Keep the underbody and cutting device clean and free of debris.
Check all nuts and bolts periodically for tightness.
Replace worn or damaged cutting devices with new ones of the same type or have them sharpened by a qualified specialist.
To replace the cutting device, loosen the hex bolt (23f) anti-clockwise, remove the locking flange (23e), cutting device (23), support (23d), ring (23c), and pin (23b). Slide the new pin (23b) into the spindle (23a) slot, then refit the other parts and tighten the hex bolt clockwise with 40 N·m min, 50 N·m max.
Lubricate the cutting device with light machine oil after each use.
Replace the cutting device after 50 hours of mowing or 2 years, whichever comes sooner, regardless of condition.

Grass Catcher (20):

Inspect before each use for damage.
Clean with water and mild soap after operation.
Let it dry thoroughly before storing to avoid mildew.

Wires (4):

Check performance before each use.
Do not use the product with defective or loose wires.

Engine:

Refer to the separate Briggs & Stratton (B&S) operator's manual (26) for engine maintenance, including air filter, carburettor, spark plug, muffler, fuel, valve play, and engine oil.

Storage:

Switch off the product and disconnect the spark plug connector.
Clean the product.
Store in a dry, frost-free place, inaccessible to children (ideal temperature 10-30 °C).
Use original packaging or a suitable cover to protect against dust.
Empty the fuel tank if storing for more than 30 days or for winter.

Transportation:

Switch off the product and disconnect the spark plug connector.
Adjust cutting height to the highest position.
Attach transportation guards if applicable.
Always transport by its handle (1).
Protect from heavy impact or strong vibrations.
Secure the product to prevent slipping, falling, fuel loss, damage, and injury.

Troubleshooting: A troubleshooting guide is provided for common issues such as the engine not starting, stopping, or losing power, erratic operation, idling poorly, skipping at high speed, overheating, unsatisfactory cutting results, or excessive vibration/noise. Users are advised to perform only the steps described in the manual; further repairs should be done by an authorised service centre.

Recycling and Disposal: Old products, petrol, oil, and oil-contaminated items should be disposed of at equipped collection centres or recycling centres, not in household rubbish. Packaging should also be recycled.

Guarantee: The product carries a 24-month guarantee from the date of purchase, excluding normal wear and tear, overload, misuse, neglect, consumable items, unauthorised repairs, accidental damage, lack of routine maintenance, failure to follow guidelines, and loss of use.