YT-85525 - Lawn mower Yato - Free user manual and instructions

USER MANUAL YT-85525 Yato

Labeled diagram of a lawn mower with numbered parts for identification

5 19 16 14 11

Close-up of a motorcycle's wheel and suspension components (no visible text or symbols)

Two grayscale images showing mechanical components with no visible text or symbols

Close-up of a bicycle pulley system with attached suspension components (no visible text or symbols)

Three-panel black-and-white photo showing a hand operating a car wheel, with no visible text or symbols.

Two-step fabric manipulation procedure showing hand holding a flexible strip and clamped clips (no text or symbols visible)

Close-up of mechanical components with visible fasteners and a label, no readable text or symbols present

1. mower
2. wheels
3. top handle
4. bottom handle
5. handle screws and nuts
6. throttle lever
7. engine safety brake lever
8. drive engagement lever
9. catcher
10. engine
11. fuel tank
12. fuel fi ller
13. air fi Iter
14. oil fi ller
15. sparking plug
16. starter pull cord
17. blade cover
18. blade
19. mowing height adjustment lever
20. mulching cover
21. side ejection shield

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Read the operating instruction

Wear hearing protectors

Wear protective goggles

Beware of ejected objects.

Stay away from bystanders

Switch off the engine and remove the spark plug wires before starting any maintenance or repair work

Keep away from rotating parts.

Attention - Do not touch the rotating blade!

Do not touch any parts of the machine before all its components have stopped

This symbol indicates that waste electrical and electronic equipment (including batteries and storage cells) cannot be disposed of with other types of waste. Waste equipment should be collected and handed over separately to a collection point for recycling and recovery, in order to reduce the amount of waste and the use of natural resources. Uncontrolled release of hazardous components contained in electrical and electronic equipment may pose a risk to human health and have adverse effects for the environment. The household plays an important role in contributing to reuse and recovery, including recycling of waste equipment. For more information about the appropriate recycling methods, contact your local authority or retailer.

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

A petrol mower is a machine powered by a combustion engine. The mower is used to cut grass on lawns of considerable size. The adjustable grass cutting height allows for versatile use. Proper, reliable and safe operation of the appliance depends on appropriate use, that is why you should

Read this entire manual before the first use of the machine and keep it for future reference.

The supplier shall not be held liable for any damage or injury resulting from improper use of the machine, failure to observe the safety regulations and recommendations of this instructions manual. Using the machine for purposes other than those for which it was intended shall cause the loss of the user's rights to a warranty and statutory warranty.

ACCESSORIES

The mower is supplied complete but requires assembly before first use. The following are supplied with the YT-85533 model: battery, charging station (charger).

SPECIFICATIONS

Parameter Unit Value
Part No. YT-85520 YT-85521	YT-85525 YT	T-85528 YT-855	32 YT-85533 YT	T-85537 YT-855	45
Number of cylinders 1 1 1 1	1 1 1 1
Number of strokes 4 4 4 4 4	4 4 4
Fuel type		Unleaded petrolE10	Unleaded petrolE10	Unleaded petrolE10	Unleaded petrolE10	Unleaded petrolE10	Unleaded petrolE10	Unleaded petrolE10	Unleaded petrolE10
Type of oil SAE 15W-40 SAE	15W-40 SAE	15W-40 SAE	15W-40 SAE	15W-40 SAE	15W-40 SAE	15W-40 SAE	15W-40 SAE	15W-40 SAE	15W-40 SAE
Engine capacity [cm]	^3 ]	123	123	139	196	196	224	224	196
Maximal power	[kW]	2.1	2.1	2.4	3.5	3.5	4.5	4.5	3.5
Maximum engine revolutions	[min ^-1 ]	2800	2800	2800	2800	2800	2800	2800	2800
Cooling		Air cooling	Air cooling	Air cooling	Air cooling	Air cooling	Air cooling	Air cooling	Air cooling
Type of starting		Manual	Manual	Manual	Manual	Manual	Manual, electric	Manual	Manual
Drive type		Manual	Self-propelled	Self-propelled	Self-propelled	Self-propelled	Self-propelled	Self-propelled	Self-propelled
Fuel tank capacity	[l]	0.9	0.9	0.9	1.0	1.0	1.2	1.2	1.0
Oil tank capacity	[l]	0.5	0.5	0.5	0.6	0.6	0.6	0.6	0.6
Sparking plug type		F7RTC	F7RTC	F7RTC	E7RTC	E7RTC	F7RTC	F7RTC	E7RTC
Air filter type		T323	T323	T323	T320	T320	T450	T450	T320
Maximum grass cutting width	[mm]	410	410	460	510	530	530	560	530
Diameter of front, back wheels	["/mm]	6/1556/155	6/1558/200	7/17810/247	8/20011/275	8/20011/275	8/20011/275	8/20011/275	8/20011/275
Grass catcher capacity	[l]	40	40	62	62	62	62	62	62
Mowing height	[mm]	25-70	25 -75	25 -75	25 -75	25 -75	25 -75	30 – 90	30 – 80
Weight	[kg]	19.7	21.1	33.6	36.2	37	37	38.5	37
Vibration level	[m/s ^2 ]	4.832 ± 1.5	4.832 ± 1.5	7.618 ± 1.5	5.177 ± 1.5	4.067 ± 1.5	4.6 ± 1.5	6.61 ± 1.5	5.165 ± 1.5
Noise level
sound pressure	[dB(A)]	82.2 ± 3	82.2 ± 3	81 ± 3	80.1 ± 3	83.0 ± 3	90.5 ± 2.5	84.5 ± 3	90.7 ± 3
sound power	[dB(A)]	93.78 ± 1.61	93.78 ± 1.61	94.46 ± 0.93	94.62 ± 1.17	95.35 ± 1.69	95.5 ± 2.5	95.7 ± 2.46	95.35 ± 1.69

SAFETY INSTRUCTIONS

IMPORTANT!

PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE USE KEEP FOR FUTURE REFERENCE

Instructions

Read the manual carefully. Familiarise yourself with the controls and proper use of the machine. If the machine is passed on to

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another person, the operating instructions must be included. Always use the machine in accordance with the guidelines in the manual.

Do not allow children or anyone not familiar with the machine instructions to operate the machine.

Never mow when anyone else, especially children or pets, is around. Before starting work, designate a safety zone within which bystanders and pets will not be allowed. A space with a radius of at least five metres must be maintained from the working mower.

Remember that it is the operator or the user who is responsible for accidents or hazards to other people or the environment.

Preparation

Always wear sturdy footwear and long trousers when working, and do not work with bare feet or in sandals.

Personal protective equipment such as safety goggles and ear defenders should be used during work. The use of personal protective equipment such as dust masks, slip-resistant safety shoes, helmets and hearing protectors reduce the risk of serious personal injuries.

Keep hair, clothing and work gloves away from moving parts of the machine. Loose clothing, jewellery or long hair can catch on moving parts of the machine and be caught, which can cause serious injury.

Avoid wearing damaged clothing which is too loose or has hanging straps or ribbons. Loose clothing parts can be caught by the machine moving parts which can lead to injuries.

Check the area where the unit will be working carefully and remove any stones, branches, wires, bones, toys and other foreign objects. Caught objects can cause damage to the machine, or can be ejected at high speed, which poses a threat to the operator and the environment.

Before turning on the machine, remove any spanners and other tools that have been used to adjust it. A spanner left on rotating parts of the machine can lead to serious injury.

Always check the blades and fixing screws for wear or damage before use. Replace worn blades and screws before starting work.

Check also whether the screw connections are not loose. Tighten the loose screws.

Operation

Do not operate the machine indoors or in confined space where vapours of dangerous carbon monoxide may accumulate. Fuel fumes and vapours are toxic. Intoxication can lead to accidents and cause serious injury or even death.

Do not work when tired or under the influence of drugs or alcohol. Even a moment's distraction while working can lead to serious personal injury.

Mow only in daylight or in good artificial lighting.

Do not mow in the rain. If possible, avoid mowing wet grass.

Make sure your feet are always standing firmly on the incline.

Maintain balance. Maintain proper posture at all times. This will allow for easier control of the machine in the event of unexpected situations during operation.

You must not run with the mower – only walk. Take special care when changing driving direction on a slope. Do not mow on excessively inclined slopes. When mowing on slopes, move across the slope, never up or down. Pay particular attention when reversing or pulling the mower towards the operator.

Switch off the engine if the unit is to be tilted when moving it on surfaces other than grass. And when it is transported to and from the mowing site.

Do not operate the mower with damaged guards and enclosures or without them. Do not use the mower without the enclosed guards and grass container or properly fitted accessories.

Start the engine as instructed, ensure that the feet are away from the blades.

Do not tilt the unit when starting the engine. Except when it requires tilting during start-up. In this case, do not tilt more than necessary and lift only the part which is away from the operator. Make sure both hands are correctly positioned before starting.

Keep hands and feet away from rotating parts. Keep an eye on the ejection port at all times to ensure that it is not blocked.

Do not lift or carry the unit with the engine running.

Stop the mower engine:

- every time you need to step away from the machine

- before refuelling or topping up engine oil

- before cleaning the outlet

- before cleaning, checking, replacing accessories or repairing the machine

- before changing the cutting height

- after it being hit by a foreign object. Check the mower for damage and repair if necessary before restarting it

- if the device starts to vibrate excessively (check immediately)

ATTENTION! After the engine is switched off, the blade continues to spin for some time. Wait for the blade to stop.

If the machine starts to vibrate excessively:

- check for damage,

- replace or repair any defective part,

- check and tighten loose parts.

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Maintenance and storage

Warning! Disconnect the spark plug before adjusting, changing accessories or storing the machine. This will allow for avoiding accidental turning on of the machine.

Keep all nuts, bolts and screws in good condition to ensure safe device operation.

Do not store the mower with fuel in the tank.

Check the grass bin frequently for wear or damage.

Replace worn or damaged parts to ensure safety.

Use caution when adjusting the machine to avoid fingers getting between its moving blades and fixed parts.

Do not disconnect or modify the guards and safety components of the machine. Improper operation of the machine's guards and safety components can cause accidents.

Use original spare parts and equipment only. The use of unsuitable equipment can lead to damage to the machine and/or serious injury.

Ensure that the correct type of blades are used.

ADDITIONAL SAFETY INSTRUCTIONS

Recommended fuel, unleaded petrol E10, with an octane number of at least 95.

Use four-stroke engine fuel and oil which are free from solid impurities. Premium quality products are recommended. They will extend the service life of the engine.

Check the oil level in the engine regularly. Operating the mower with too low or no oil level can lead to damage and even fire.

Ensure that the mower is properly assembled before starting work.

Do not expose the machine to moisture. Do not use the mower during precipitation or when there is a risk of lightning. Do not use the mower in a humid and wet environment.

Before using the machine, it is recommended to ask your dealer or specialist to demonstrate how to use it safely and effectively.

Do not modify the machine in any way. Do not use substitutes for blades other than the original.

Always start operation wearing work clothing, gloves, full footwear and safety glasses protecting against mechanical hazards.

If during work the operation of the mower seems suspicious (increased vibration, noise, odour, etc.), it should be immediately turned off and handed over to a repair centre.

After replacing the blade, ensure that the blade rotates freely and without obstruction before restarting the mower. The blade must be carefully balanced before installation.

The mower must be regularly maintained and kept clean.

For repairs and maintenance use only original spare parts.

The motor ventilation openings must be kept clear at all times.

Do not run the mower in enclosed or unventilated areas. The exhaust gases contain substances that are harmful to health and must not be inhaled.

The fuel feed system must be checked periodically. If you notice leaks, have the unit repaired by an authorised servicing centre.

Wait until the engine has reached its rated speed before mowing.

Do not allow fuel to run out while the engine is running!

Do not cover the ventilation inlets and outlets Even when the mower is not running.

Before transporting the mower, it is necessary to empty the fuel tank.

Do not touch the engine surfaces that become hot during operation. This may cause burns.

The fuel is highly flammable! Do not fill the fuel tank while the machine is running. Do not refuel near an open flame. Do not spill fuel. In the event of a fuel spillage, dry up the spilled fuel thoroughly before starting the mower. Tighten the fuel fi ller cap fi rmly and securely.

If leaving the mower unattended, switch off the engine and wait for the blade to stop spinning.

Do not modify the engine or other mechanisms of the mower in any way.

Do not operate the mower without the air filter correctly fitted.

On mowers equipped with a self-propelled mechanism, ensure that it is switched off before starting or maintaining the mower.

MOWER ASSEMBLY

Preparation for assembly

Unpack the product by removing all packaging components. It is recommended to retain the packaging, which can be of use when transporting or storing the product.

Check that no part of the product has been damaged during transport. In case of damage detection, such as cracks or deformations, it will disqualify the product from further use until it is repaired or damaged components are replaced.

It is recommended to place all the components on a flat, hard, and clean surface.

Use personal protective equipment such as protective gloves, eye protection, and protective clothing during assembly.

Handle installation

Insert the lower part of the handle into the catches on the body of the mower and fix with screws and nuts (II).

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Use bolts and hexagonal or wing nuts to fix the lower part of the handle, the number required may vary depending on the model. Attach the upper part to the lower part of the handle using screws and wing nuts (III).

In the case of models fitted with a shelf with cup holder or additional controls, this must be fitted to the top bracket using fixing screws (IV).

Secure the cables to the bracket with clips. Pay attention to correct cable routing. Ensure that all cables and wires run without kinking or crushing.

Front wheel assembly (YT-85545)

On the three-wheel model, mount the frame with the front wheel to the holes on the front of the mower using the bolts and fixing nuts (V). The front wheel bracket is fitted with holes that allow the wheel to be fixed with an axle and wing nut at one of 6 levels, which translates into a cutting height setting at the front of the machine (V).

Assembly of the basket

Make sure that the hooks of the catcher cover are properly placed on a bar around the grass catcher inlet (V).

Lift the back ejection cover,

Caution! For models with a mulching function, the mulching cover (VIII) must be removed before fitting the basket.

Lift the back ejection cover.

Fit the bag rack onto the projections on the back of the mower housing (VII).

Lower the lid onto the basket frame.

Mulching (VIII)

Warning! If it becomes necessary to fit accessories during operation, always stop the mower first, wait for the blade to stop, disconnect the spark plug wire and only proceed with the fitting operations. Accidental starting of the blade during installation may result in serious injury.

Mulching involves cutting the grass, shredding it and then leaving it on the lawn as a natural protective layer. The mulching function is available on models fitted with a mulching hood.

To set the mower into mulching mode, ensure that the side discharge window is covered by a lid and that the back discharge window has a mulching hood. The basket should be removed and the back ejection window covered with a lid.

Side ejection assembly (IX)

Warning! If it becomes necessary to fit accessories during operation, always stop the mower first, wait for the blade to stop, disconnect the spark plug wire and only proceed with the fitting operations. Accidental starting of the blade during installation may result in serious injury.

On models equipped with a side ejection window, it is possible to fit a side ejection. To do this, lift the window cover lock lever, raise the side ejection window cover and install the cover, then lower the cover onto it. This will ensure that the cover stays in place.

Caution! Install a mulching cover in the back ejection window. The basket should be removed and the back ejection window covered with a lid.

Warning! If it becomes necessary to fit accessories during operation, always stop the mower first, wait for the blade to stop, disconnect the spark plug wire and only proceed with the fitting operations. Accidental starting of the blade during installation may result in serious injury.

OPEARTING THE MOWER

Preparing the workplace

Before starting work, clear away all visible stones, roots, wires and other obstacles that could be caught by the rotating blades and damage the machine. Particular attention must be paid to electrical cables to ensure that they do not enter the work zone. Leaving electrical cables in the working area can lead to electric shock or even death as a result of contact with the rotating mower blades.

Preparing for operation

Before starting work, check that the machine is not damaged, is correctly assembled and that all safety components are correctly attached. If the machine is found to be incomplete or damaged, further work is prohibited!

ATTENTION! Only the amount of oil needed for engine maintenance was poured into the engine. Before the first start-up, the oil must be topped up to the required level.

In a factory state, there is only a small amount of oil in the engine to protect it during transport and storage. Prepare oil for four-stroke engines in viscosity class SAE 15W40.

Before replenishing the oil, place the machine on a flat surface, then unscrew the oil tank cover and wipe the oil bayonet attached

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to it dry. Fill the tank with oil. When filling, it is recommended to use a funnel or filler nozzle to avoid spilling oil. In case of spilling the oil, thoroughly wipe off its residues before starting the engine. Check that the level is appropriate. To do this, insert the bayonet into the inlet and screw the tank cover. Then unscrew it and check the oil level on the bayonet. The oil level should be between the maximum and minimum levels on the bayonet (XX). After making sure that the oil level is correct, close the inlet with a cap.

Caution! Check the oil level before each use.

After refilling oil, refill fuel. Use 95-octane unleaded petrol or better. To refuel, unscrew the fuel tank cover and pour the fuel into the tank. When filling fuel, it is recommended to use a filler nozzle or funnel to reduce the risk of fuel splashes. If the fuel is splashed, thoroughly wipe off its residues. Wait until the vapours have completely evaporated and carry out the start-up at a different place than at which the fuel was filled. Close the fuel tank inlet with the cover after filling.

Cutting height adjustment (X)

Warning! If you need to change the cutting height during operation, always switch off the lawnmower first, wait for the blade to stop and then change the cutting height. Accidental starting of the blade during a height adjustment may result in serious injury.

It is possible to set one of several grass cutting heights. The lawnmower is equipped with a lever that allows you to change the cutting height easily and quickly. Slide the lever to the side by pulling it out of the guide seat. Then move forwards or backwards and, once the desired height has been set, move the lever to the side, locking its position in the guide seat. The mowing height range for a given mower model is given in the technical data table.

The YT-85545 model features height adjustment at the front and back of the machine. The cutting height at the back of the machine is set using the height setting lever as described above, while the cutting height at the front of the machine is set by fixing the front wheel at the correct level, as described in the instructions section "Front wheel assembly (YT-85545)". Make sure that the cutting height at the front and back of the mower is the same.

Starting the combustion engine

The blade starts to rotate as soon as the engine is started.

Caution – Do not touch the rotating blade!

If the mower is equipped with a fuel pump, push it 3 times (XI).

If the mower is equipped with a throttle lever, move the throttle lever to the START position (XIII).

Stand behind the mower. Pull the motor safety brake lever against the handle (XII). Remember to keep the emergency brake lever pulled against the handle when starting the mower and during operation to prevent the engine from shutting down.

Caution! For models equipped with a drive, please note that the drive engagement lever must be released to prevent the mower's drive from engaging when starting the mower.

Pull the starter pull cord smoothly until you feel the resistance caused by the engine compression, which is when you should pull it vigorously and firmly (XIV). After a few pulls, the engine should start.

Once the engine has started, the starter cord handle should not be released from the hand, it should be brought to the lower position or hooked to the hook on the mower handle (XIV).

For models equipped with a throttle lever, as the engine warms up, move the lever to the running position, between the hare symbol, for faster revs, and the tortoise symbol for slower revs. Allow the engine to start running smoothly every time you reposition the throttle lever. The rate at which the throttle lever should be reversed depends on the ambient temperature in which you start the engine. The lower the ambient temperature, the slower the lever should be reversed.

Starting the combustion engine with the push of a button (applies to model YT-85533)

The blade starts to rotate as soon as the engine is started.

Caution – Do not touch the rotating blade!

On a mower with electric start, starting with a push-button is possible. The battery supplied with the mower must be installed to power the starter. The battery should be charged for starting.

Open the battery cover located in the centre of the shelf in the mower handle. Slide the battery into the battery socket guide until it latches in the socket. Make sure that the battery will not slide out on its own during operation. Close the battery cover. Press the fuel pump 3 times (XI). Move the throttle lever to the START position (XIII). Pull the motor safety brake lever against the handle (XII). Remember to keep the emergency brake lever pulled against the handle when starting the mower and during operation to prevent the engine from shutting down. Press the electric start button (XV). If the mower engine does not start the first time, wait at least one minute before trying to start the engine again.

Switching on the mower drive (applies to models equipped with a drive function)

The drive function of the mower is available when the machine is started. Please note that the engine safety brake lever must be pulled against the handle at all times when the drive is engaged and during operation to prevent the motor from shutting down.

To engage the drive of the mower, pull the drive engagement lever against the handle (XVI).

To disengage the mower drive, release the drive engagement lever.

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Stopping the engine

On models fitted with a throttle lever, move the lever to the position marked with the turtle symbol.

Let go of the engine emergency brake lever.

Wait until the blade stops rotating.

Allow all engine and mower components to cool, disconnect the spark plug and proceed with maintenance.

Refuelling

ATTENTION! The fuel is highly flammable! Do not fill the fuel tank while the machine is running. Do not refuel near an open flame. Do not spill fuel. In the event of a fuel spillage, dry up the spilled fuel thoroughly before starting the mower. Tighten the fuel filler cap firmly and securely.

Stop the engine according to the procedure described above.

Allow the engine to cool down.

Use 95-octane unleaded petrol or better. To refuel, unscrew the fuel tank cover (XVII) and pour the fuel into the tank. When filling fuel, it is recommended to use a filler nozzle or funnel to reduce the risk of fuel splashes. If the fuel is splashed, thoroughly wipe off its residues. Wait until the vapours have completely evaporated and carry out the start-up at a different place than at which the fuel was filled. Close the fuel tank inlet with the cover after filling.

Re-start the engine according to the procedure "Start-up of the combustion engine".

Operation of the lawnmower

Before starting work, prepare the grass mowing area. Check that there are no obstacles in the mowing area that could be caught by the blade and damage the lawnmower, or be ejected and pose a risk to an operator or bystanders.

Check that there are no electrical cables in the work area that could be cut by the blade. Damage to an electrical cable presents a risk of electric shock, which can lead to serious injury or death.

Make sure that there are no bystanders or pets in the work area. If such persons appear during operation, stop the lawnmower immediately and only then warn people of the danger.

Check the grass length and adjust the cutting height. Never cut more than 1/3 of the grass length. If the grass is very long, it should be cut in stages. Mowing must be carried out regularly to ensure that the grass length does not exceed the capabilities of the lawnmower.

Never cut wet grass. Wet grass tends to stick inside the product, which interferes with its accumulation in the catcher. Wet grass can also cause slipping and falling.

Check all lawnmower components before starting work. In case the damage is detected, do not start work before removing the damage or replacing the damaged components with new ones. Make sure that the ventilation openings are clear. If necessary, clean them with a soft cleaning tool or brush. Do not use sharp or metal objects for cleaning the product ventilation openings.

Check the tightness of the screw connections. Tighten if necessary.

Check that the handlebars are clean, free of grease and other contamination. If necessary, clean them with a soft cloth.

Take regular breaks during work to avoid fatigue and overwork. This will allow better product control and reduce the risk of accidents.

Caution! Always push the lawnmower while working; never pull towards yourself. Pulling the lawnmower causes the operator to move backwards, which means he does not control the area behind him.

Push the lawnmower slowly; always walk, never run. This will give you better control of the lawnmower and reduce the response time to unexpected events.

During mowing, move along the rows (XVIII). Rows should be kept equal in width, slightly overlapping so as not to leave any space. Take special care when changing the direction.

When cutting the grass near the flower beds, move around them.

Empty the catcher regularly during operation.

When finished, switch off the mower, wait for the blade to stop, allow the mower to cool down, disconnect the spark plug and then proceed with maintenance.

Caution! If a foreign object hits the lawnmower during operation, Switch off the mower immediately, wait for the blade to stop, allow the mower to cool down and disconnect the spark plug. Then check the lawnmower for damage. If the damage is detected, it is forbidden to continue working before removing the damage. Excessive vibration during operation can be caused by the lawnmower damage. In that case, stop working, disconnect the spark plug cable, and check the product.

MOWER MAINTENANCE

Warning! Before carrying out maintenance, switch off the mower, wait for the blade to stop, allow the mower to cool down and then disconnect the spark plug. Use personal protective equipment such as protective gloves, eye protection, and protective clothing during the maintenance.

During the warranty period, the user cannot disassemble the tool or replace other assemblies or components than those listed

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below, as this will result in the loss of warranty rights. Any irregularities found during the inspection or the operation signal the need for repair to be done at the service centre. After each transport and after every 25 hours of operation, check that the tightness of the screw connections is correct.

After finishing work, the housing, ventilation openings, switches, auxiliary handle and covers should be cleaned e.g. with an air jet (with a pressure not exceeding 0.3 MPa), paintbrush or dry cloth without the use of chemicals and cleaning agents. The product cannot be cleaned with a water jet or by immersion in water. Clean the tools and handles with a clean and dry cloth.

Replacing the blade

Check for wear and damage to the blade. If excessive wear or damage is observed, replace the blade with a new one. The blades will lose the paint coating during operation. This is a normal phenomenon and does not indicate damage to the blades. Lack of paint coating, however, makes the blades more susceptible to corrosion. Therefore, each time after cleaning, they should be covered with a thin layer of anti-corrosion agent or a thin layer of light mechanical oil.

Always replace the blades with the original ones, identical to the ones installed in the mower at the factory.

Only the use of original spare parts can maintain product safety. The blade should be replaced by an experienced user. To do this, contact an authorised service centre of the manufacturer.

The blade should be replaced every two years or 50 hours. Depending on the model, it is possible to use the blade listed under “Spare parts” in the manual.

To replace the blade, unscrew the blade retaining screw (XIX).

Remove the old blade, clean the blade mount and fit the new blade so that the tabs on the mount go into the blade holes. Tighten the fixing screw using a torque spanner and applying a torque of 37 Nm.

Checking the oil level

Unscrew the oil cap and remove the oil level indicator (XX).

Clean and dry the indicator with a clean cloth.

Insert the indicator back into the hole, but do not turn it. Then remove and check the oil level indicated.

If the indicated level is too low, the oil must be topped up to the upper level of the indicator (dashed box).

Screw the indicator into the oil filling hole.

Changing the engine oil

The first engine oil change should be carried out after 2 to 4 hours of operation. Subsequent oil changes should be performed every 25 hours of operation.

Note! It is best to change the oil immediately after stopping the engine, when the oil is thinnest and flows most easily from the transmission chamber.

Caution must be exercised – hot oil can cause burns.

Depending on the mower model, the oil change should be performed in one of the following ways:

Models equipped with a drain hole (YT-85528, YT85532, YT-85545):

Place a container larger than the oil tank capacity under the drain hole. Using a wrench, fully unscrew the drain valve (XXI) and allow the oil to flow freely. Then screw the drain valve back in and wipe the remaining oil dry.

Models without a drain hole (YT-85520, YT-85521, YT-85525, YT-85533, YT-85537):

For models not equipped with a drain hole, the oil must be removed using a commercially available oil extractor, following the extractor manufacturer's instructions. After unscrewing the oil filler cap, insert the extractor tube into the filler opening and extract the oil. Repeat the operation several times until all the oil has been removed. After completing the extraction, wipe the oil residues dry. After removing the old oil, refill the tank according to the procedure described in the "Preparation for Use" section.

Note! Used engine oil must be disposed of in accordance with local regulations. Pouring oil into the sewage system is prohibited.

Air fi Iter maintenance (XXII) - every 25 hours of operation

Unscrew the air filter retaining nut and remove the filter cover or unlock the retaining lugs and open the filter housing. Remove the filter and then replace it with a new one. Depending on the model, it is possible to use the filter listed in the “Spare parts” table.

Install the filter in place and fix the filter cover. Ensure that the filter housing is tightly closed, that the retaining nut is firmly and securely screwed on or that all the housing lugs are in place.

Spark plug maintenance (XXIII) - every 100 hours of operation

Disconnect the cable from the spark plug. Unscrew the spark plug with the spark plug wrench. Use a wire brush to clean carbon deposits off the electrodes (so-called combustion deposits). Check the distance between the electrodes, it should range between 0.7 mm and 0.8 mm.

If burned electrodes or the ceramic casing is broken, replace the spark plug with a new one. Depending on the model, it is possible to use a spark plug listed in the "Spare parts" table.

Screw in the spark plug. Connect the cable to the spark plug.

EN

Wheel replacement (XXIV)

If the mower wheel is damaged, it must be replaced with a new defect-free wheel. Depending on the mower model, it is possible to use the wheel listed in the "Spare parts" table. To replace the wheel, pivot the wheel cover at the small cut-out, e.g. using a screwdriver. Unscrew the wheel fixing nut using a suitable spanner. Remove the wheel. Pay attention to the shims, which must be put in place when fitting a new wheel. Fit the new wheel, then tighten the retaining nut. Install the decorative cap.

Mower maintenance

Before and after each use, check the patency of the vents and clean them if necessary.

The bin should be emptied of grass residue and debris after each use.

Remove grass residue and dirt from the cutting blade with a soft cloth. Apply a thin layer of oil to the cleaned blade to prevent corrosion.

If the mower is equipped with a water connection, it is possible to clean the inside of the mower of grass residue and dust. The water connection allows the connection of a garden hose with running water (XXV). Washing of the inside of the mower is done with the engine running. The blade will spread the water around the inside of the mower guard to clean it.

Storing the mower

Place a container with a capacity greater than that of the oil tank underneath the drain opening.

Use a spanner to unscrew the fuel drain valve (XXVI). After emptying the mower of fuel, turn the fuel drain valve off.

Change the oil according to the procedure described under "Changing the oil"

Pull the starter pull cord so that the engine makes a few revolutions.

Stop pulling the rope when you feel resistance.

Clean the outside of the mower. Preserve with an anti-rust agent.

Store the mower in a dry, well-ventilated and covered room. The place of storage should protect the tool from access by children.

The product should be stored at a temperature between 10^ C and 30^ C. It is recommended that the product is stored in its original packaging or another packaging that protects it from dust.

Store the mower in a horizontal position.

Transporting the mower

Transport the machine while grasping the handle. In the case of transporting it by the means of transport, the mower must be secured against movement.

Protect the product from impacts and strong vibrations during transport. The mower must be transported in a horizontal position.

Spare parts

Spare part Part no. Mower	part no. Type
Spark plug	YT-855487	YT-85520, YT-85521, YT-85525, YT-85533, YT-85537	F7RTC
	YT-855488 YT-85528, YT-85532, YT-85545 E7RTC
Air fi liter	YT-855490 YT-85520, YT-85521, YT85525 T323
	YT-855491 YT-85528, YT-85532, YT-85545 T320
	YT-855493 YT-85533, YT-85537 T450
Blade	YT-855470 YT-85520, YT-85521 16"/410 mm
	YT-855471	YT-85525	18"/460 mm
	YT-855472	YT-85528	20"/510 mm
	YT-855473 YT-85532, YT-85533, YT-85545 21"/530 mm
	YT-855474	YT-85537	22"/560 mm
Wheel	YT-855480 YT-85520, YT-85521 6"/155 mm
	YT-855481 YT-85525, YT-85570 7"/178 mm
	YT-855482	YT-85528, YT-85532, YT-85533, YT-85537, YT-85545	8"/200 mm
	YT-855483	YT-85525	10"/247 mm
	YT-855484	YT-85528, YT-85532, YT-85533, YT-85537, YT-85545	11"/275 mm

Power supply battery (applies to model YT-85533)

A YATO 18-volt Li-Ion battery can be used for power supply: YT-828461, which can only be charged with YATO YT-828498, YT-828499, YT-828500, YT-828501, YT-828502, YT-828503, YT-828504 chargers. It is forbidden to use other batteries with a different rated voltage and not matching the tool battery socket. It is forbidden to modify the socket or battery to make them match.

Charging the battery (applies to model YT-85533)

Slide the battery into the charger socket (XXVII).

EN

Plug the charger into a mains socket.

There is an indicator light near the battery socket to indicate charger operation as described in the table "Charging status indication". When charging is complete, unplug the power adapter from the mains socket. Slide the battery out of the charging station by pressing and holding the battery latch button, then slide the battery out of the charger socket.

CHARGING STATUS INDICATION

YT-828498, YT-828499

Green colour Red colour Operating status
continuous light waiting to be charged
	continuous light charging
continuous light battery charged

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

Green colour Yellow colour†	Red colour Operating status
			waiting to be charged
blinking charging
continuous light battery charged
		blinking battery overheated
		continuous light battery defective
	blinking charger overheated
	continuous light charger defective

*only for model no. YT-828502

Safety instructions for battery charging

Caution! Before starting charging, make sure that the power unit body, cable and plug are not cracked or damaged. It is forbidden to use a defective or damaged charging station and power unit! Use only the supplied charging station and power unit to charge the batteries. The use of another power unit may result in fire or damage to the tool. The battery should only be charged in a closed, dry room, protected against unauthorised access, especially by children. Do not use the charging station and power unit without the constant supervision of an adult! If you need to leave the room where the product is being charged, disconnect the charger from the mains by removing the power unit's plug from the mains socket. If smoke, suspicious odours, etc. are escaping from the charger, remove the charger plug from the mains socket immediately!

The tool is supplied with an uncharged battery and should therefore be charged according to the procedure described below with the included power unit and charging station before use. Li-ion (lithium-ion) batteries do not have the so-called “memory effect”, which means they can be recharged at any time. However, it is recommended to discharge the battery during normal operation and then charge it to full capacity. If, due to the nature of work, it is not possible to use the battery in such a manner every time, it should be done at least every several work cycles. Never discharge any batteries by short-circuiting the battery plates, as this will cause irreparable damage! In addition, do not check the battery charge status by short-circuiting the electrodes and checking their sparking.

Storing the battery

Ensure proper storage conditions to extend the battery's life. The battery can last for approximately 500 charge-discharge cycles. Store the battery at a temperature ranging from 0^ C to 30^ C at a relative air humidity of 50%. Charge the battery to approx. 70% of its total capacity to store it for a longer period of time. In case of prolonged storage, the battery should be periodically charged once a year. Do not over-discharge the battery as this will shorten its life and may cause irreparable damage.

During storage, the battery will gradually discharge due to leakage. The self-discharge process depends on the storage temperature – the higher the temperature, the faster the discharge process. If the batteries are stored incorrectly, the electrolyte may leak. In case of leakage, secure the leak with a neutralising agent. In the case of electrolyte contact with eyes, rinse eyes thoroughly with water, and immediately seek medical attention. It is not allowed to use the tool with a damaged battery. If the battery is completely worn, return it to a specialist waste disposal centre.

Transporting the batteries

Lithium-ion batteries are treated as hazardous goods according to legal regulations. The user of the tool can transport the product together with the battery and the batteries alone by land. In that case, no additional conditions have to be met. If you entrust transport to third parties (e.g. a courier company), follow the regulations regarding the transport of hazardous goods. Before shipping, please contact a properly qualified person. It is not allowed to transport damaged batteries. For the duration of transport, remove the demountable batteries from the product and secure the exposed contacts, e.g. by covering them with insulation tape. Protect the batteries in the packaging in such a way that they do not move inside the packaging during transport. National regulations for the transport of hazardous materials must also be observed.

PRODUKTBESCHREIBUNG

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

CARACTÉRISTIQUES DU PRODUIT

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

Modellen zonder aftapopening (YT-85520, YT-85521, YT-85525, YT-85533, YT-85537):

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

Transport van accu's

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

DODATNE SIGURNOSNE UPUTE

Preporučeno gorivo, bezolovni benzin E10, s oktanskim brojem od najmanje 95.

YT-828500, YT-828501, YT-828502, YT-828503, YT-828504

Zelena Žuta* Crvena Status posla
			čekanje na punjenje
pulsiranje punjenje
kontinuirano svjetlo baterija je napunjena
		pulsiranje baterija se pregrijava
		kontinuirano svjetlo baterija je oštećena
	pulsiranje pregrijavanje punjača
	kontinuirano svjetlo punjač oštećen

DEKLARACJA ZGODNOŚCI DECLARATION OF CONFORMITY DECLARATIE DE CONFORMITATE

1225/YT-85520/EC/2025

We declare and guarantee with full responsibility that the following products:

meet requirements of the following European Standards / Technical Specifications:

and fulfill requirements of the following European Directives:

Machinery and safety elements

Emissions from non-road mobile machinery

Serial number: concern all serials numbers of item(s) mentioned in this declaration

The person authorized to compile the technical file: