OREC GRH537Pro User manual

Read this instuction manual carefully before using the machine and keep it as a reference.
The engine manual is included as a set with the owners manual.
Please read both manuals carefully
For any questions about this manual, please contact your OREC dealer, the
OREC distributor in your country, or go to : http://www.orecamerica.com
0268-77000
OWNER’S MANUAL
GR537Pro/GRH537Pro
Grassland walk behind mowe
r
1

Introduction
Thank you for purchasing this machine. These instructions explain the correct and easy way
to always keep this machine in proper working order and how to operate it safely.
Please read these instructions fully before using this machine in order to understand the
safest, most efficient way of operating it, and the correct way to maintain it.
Please keep these instructions in a safe place where they can be easily referred to at any
time. We hope you will use this machine for many years to come.
Furthermore, please understand that ongoing improvements in quality and performance, and
other possible parts changes may cause the actual machine to vary slightly from what is
described in these instructions.
Machine Regulations
This product is designed for lawn mowing and may not
provide a sufficient cut for overgrown weeds and brush
Definitions and Signs
In these instructions, the following signs and definitions are used to indicate the level of
danger that exists. Please obey the following warnings and have a full understanding of the
meaning of the signs.
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate injury.
Displayed when it is important to know about points of operation and
maintenance specific to this machine, or at times when
misunderstanding and mistakes are common.
Sign Definition
DANGER
CAUTION
WARNING
NOTICE
2

1, For Safe Operation ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・
1) Warning labels ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
2) Important safety points ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・
2, MOWER Controls and Features ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
3, How to Assemble Machine・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
4, Before Operation・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
5, How to Operate ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・
1) How to start and stop the engine ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
2) Operating the contorols for mowing・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
6, Parts Inspection and Repair・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・
1) Oiled Parts Inspection, Replacement, and Lubrication ・・・・・・・・・・・・・・・
・
2) Cleaning the air filter ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
3) Checking and adjusting the spark plug ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
4) Spark Arrester (optional equipment) ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
5) Adjusting each wire ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
6) Inspecting and replacing blades ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・
7, Regarding Long-term Storage ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
8, Specifications ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
9, Consumable Parts List ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
10, Optional Equipment ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・
11, Periodic Voluntary Inspection Table ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・
12, Self Diagnosis Table ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
13, Troubleshooting・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
14, LIMITED WARRANTY・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
22
30
Contents
25
15
17
17
19
34
31
26
33
4
4
5
11
13
22
35
27
28
26
29
30
30
3

1, For Safe Operation
Please read the safety and engine manuals carefully before operating this machine.
Please wear protective clothing and equipment such as gloves, helmet, ear
and eye protection, non-hanging shirt sleeves and pant legs.
Please carefully inspect the machine to ensure that it works properly.
1) Warning labels
The warning signs are attached to the machine to draw attention to particularly serious
dangers. Please be sure to fully understand the meaning of each warning sign before
operating this machine.
Remove all objects that
Read the safety and could be thrown by the
operating manual mower blades.
Beware of thrown objects.
Always wear safety glasses
or goggles, and ear Do not use on slopes of
protection while more than 15°
operating the machine.
Keep body parts away from the mower blades.
For the Engine
Read Engine instruction manual before using.
Pay attention to exhaust Gas, hot surfaces, and flammable
gasoline. (Engine Parts)
●
If these warning labels become difficult to see, please replace them so that
they can be easily seen and understood.
NOTICE
4

2) Important safety points
This machine is equipped with a high-powered engine and fast moving blades. Misuse of this
machine can result in serious injury or death. Before using this machine, please be sure to
read these instructions and understand and obey the following warnings.
■Notes for the operator of this machine
●
The operator of this machine should fully read these instructions. You can safely use this
machine only after gaining a full understanding of its operation and safety use guidelines.
●
Operate this machine only after fully reading and understanding the included engine’s
instructions.
●
The operation and maintenance of this machine should only be performed by trained persons.
●
DO NOT allow children, expectant mothers or any untrained person to use this machine, accident
and injury can result. Furthermore, please check and observe local law which may place age
limits on the operation of machinery.
●
DO NOT operate if suffering from overwork or illness or if under the influence of alcohol or drugs.
Accidents and injury can result.
■When lending this machine to another person
When lending this machine to another person it is the owner’s responsibility that the
following steps are taken:
●The owner should explain how to operate the machine and have the new operator fully read
these instructions. The owner should then guide the new operator until they have a
comprehensive understanding of the machine’s operation and safety guidelines. Furthermore,
the owner should lend these instructions to the new operator together with the machine.
●When lending this machine to a person who can not read English, the owner should take
responsibility for completely explaining its safe operation.
●Before lending this machine to another person, the owner holds responsibility for the
proper maintenance of this machine, including checking that all parts are correctly
attached and that all functions are working correctly.
■Managing gasoline safely
●
Under no circumstances should you smoke, operate firearms, or use any open flame
near gasoline. Also, please be careful of static electricity as gasoline is extremely
flammable.In addition, gasoline is highly volatile and may cause fire or an explosion
●
DO NOT use a type of gasoline other than that described. There is a danger of fires
and explosions.
●
Gasoline and oil should be stored away from fire in vented, metal non-flammable tanks.
Also, please keep out of reach of children, to prevent fire or other accident
●
Please refuel in a place that can be well ventilated. As gasoline is a highly volatile substance,
there is a danger of illness if you operate the machine in a poorly ventilated place.
●
DO NOT open the fuel cap while running the engine.
●
When refueling, please stop the engine and wait until it has cooled. Failure to do so
could cause fire or other accidents, and presents a burn hazard.
WARNING
DANGER
WARNING
WARNING
5

●
When refueling, be sure not to fill the fuel tank over the
maximum level. If you do overfill the fuel tank, remove
fuel until it sits below the maximum level. Over-fueling can
cause fire and other accidents.
●
After refueling, tightly close the fuel tank cap, make sure there is no leakage of gas
and make sure there is no open flame in the operating area, as this could start a fire.
●
If gasoline is spilled, move the machine a safe distance away without starting the engine.
Starting the machine in close proximity to spilled fuel could result in a fire or other accident.
Use a cloth to wipe away the spilled gasoline and dispose of any such cloth in a suitable manner.
●
Be sure to change your clothes immediately if they come into contact with gasoline. There is a
danger that any gasoline on your clothes could ignite or cause you to feel unwell.
●
DO NOT refuel in places such as inside a car or on a truck, as they could move unexpectedly.
Refuel after placing your fuel container safely on the ground, away from vehicles.
Spilt fuel can cause fire and other accidents.
●
Please DO NOT refuel while the machine is on a vehicle or trailer, as this could cause fire or
accident
●
DO NOT remove the refueling nozzle from the fuel tank until you have finished refueling.
Spilt fuel can cause fire and other accidents.
■Caution when starting the engine
●
Please DO NOT modify the engine, as this could cause fire, malfunction or other
accidents. Orec assumes no liability for accidents or injuries resulting from modification or
addition to the machine. Any additions or modifications will also void warranty claims.
●
DO NOT try to alter the position of the engine governor or change the set rotation speeds.
●
DO NOT run the engine in a place that is poorly ventilated. Engine exhaust gas is odorless
and contains carbon monoxide which can cause death or serious injury.
●
DO NOT allow highly flammable substances near to the engine or the path of the exhaust
as this can cause a fire.
●
DO NOT touch the engine or muffler as they become extremely hot during operation and can
cause severe burns.
●
Ensure that no material builds up in the engine or muffler as this can result in a fire.
●
Ensure that the drive clutch and blade clutch are in the [OFF] position , before starting the engine.
Not taking precautions when starting the engine can cause injury and accidents.
■Caution when loading and unloading
●
When loading or unloading using a truck, proceed carefully and be certain to park on a flat and
safe surface. A truck moving suddenly could cause injury and accidents.
●
Attach a gently sloping ramp securely to the truck’s loading platform and reduce engine power
to low. The speed change lever should be put in the forward [1] position for loading, and in the
reverse [R] position for unloading. Proceed with caution as injury and accidents can be caused
by the machine tipping over or running out of control.
DANGER
WARNING
WARNING
6

■Before operating the machine
●
DO NOT remove any parts of this machine that have been fitted as standard. To prevent
accidents, be sure to use all covers and parts in the same state as they have been fitted.
●
DO NOT try to modify this machine (including modification of the protective cover and
safety cover) as this can cause injury and accidents. You will bear responsibility for any accidents
or problems caused by modification. Also, trying to claim compensation in such cases will be
ineffective.See bottom of page.
●
DO NOT change or tamper with the safety apparatus. Inspection should be
performed periodically to ensure the safety apparatus is working correctly.
●
For reasons of safety, use the recommended accessories and attachments that are best suited
to the ground you are working on and the type of work you are performing.
●
This machine can not be ridden, do not try to ride it or allow children or pets to ride on it. This can
cause injury to people/pets and damage to the machine.
●
Wear suitable clothing when operating this machine. Please wear the following items to protect
against injury and reduce the possibility of accidents.
Long sleeves, long pants Protective glasses
Non-slip shoes Gloves
Helmet Ear protectors
In particular, avoid wearing items such as cuffs, hems of loose clothing, and jewelry. Such items
can become entangled in the machine, causing injury and accidents. Long hair should be tied
up inside a helmet.
●
Ensure that no part of your body comes into contact with the moving blades of this machine
There is the possibility of serious injury such as the severing of hands and feet.
●
Be sure that there are no people, animals or vehicles close by. Not taking these precautions
can cause injury and accidents.
●
Before mowing, remove any rocks or branches that could be thrown and cause injury to
bystanders or damage to the machine.
●
Use this machine during daylight or with sufficient artificial light. Do not operate this machine at
night when poor visibility will not allow you to have a complete grasp of your surroundings. Not
being able to see dangerous objects and bystanders is a common cause of injury and accidents.
●
DO NOT operate this machine in places where there are dangerous drops, ditches or
embankments. Accidents can be caused by the machine tipping over.
●
DO NOT use this machine on wet grass. It is easy to slip on wet grass, causing injury and
accidents.
●
Altering this machine in any way will void the warranty.
Orec America Inc. will bear no responsibility for damage or injury caused by alterations
or modifications.
DANGER
WARNING
7

■Caution during operation
●
During operation, blades, chains and belts are hidden by a cover, be sure to keep hands and feet
well away. Touching these parts can cause serious injury such as the severing of hands and feet.
●
During operation, the rotating blades come right to the edge of the blade cover. DO NOT put your
hands inside the cover to try to clear grass, etc. Not taking these precautions can cause injury.
●
Before removing entangled grass or other foreign objects from the blades, be sure to stop the
engine and remove the spark plug cord. Check that the blades have stopped moving before
carefully removing any entangled material.
●
Be sure that there are no people, animals or vehicles close by. When operating this machine,
always maintain a distance of 100 FEET between yourself and bystanders. If people or animals
come near, release the blade clutch and switch off the engine. Not taking these precautions can
cause injury and accidents.
●
For safety reasons, DO NOT make sudden starts/stops or sharp turns.
●
Take care to move and turn the machine slowly. Furthermore, stop the blades when not cutting
grass. Not taking precautions can cause injury and accidents.
●
The operatior should always stay behind the handlebars. When this machine’s engine
is running, do not stand in front of the path where you are cutting grass or try to cut sideways.
Not taking precautions can cause injury and accidents.
●
Look out for holes in the ground and protruding tree roots. Also look out for obstructions that
could be hidden in long grass. The handlebars can be taken from your control, causing injury
and accidents.
●
Be careful when approaching blind corners, bushes, and trees which block your line of sight.
Such obstructions can hide children and animals from view.
●
DO NOT drive this machine in the direction of rivers and drop-offs, people and buildings.
Accidents can be caused by falls and collisions.
●
When moving the machine backwards, check that there are no people or obstacles behind
you and that you have a secure foothold. When reversing, there is a danger of being trapped
between the machine and a wall or falling from drop-offs.
●
Exercise caution when operating the machine alongside fences, buildings and trees. The
machine’s handlebars can be taken from your control if you come into contact with obstacles,
possibly causing injury and accidents.
●
DO NOT leave the machine unattended with the engine running. When leaving the machine
unattended, park on a flat surface with the engine switched off.
Injury and accidents can occur if the machine moves while unattended.
●
When working near trees, shrubs, and building corners, please take care not to run unit into
hard surfaces, as this could cause accident or injury. If you do hit a hard surface, please stop
the engine immediately. Once you have checked that the blade has stopped rotating, please
disengage the spark plug and check the blade, belts, wires, brakes.
If there are any problems with these parts, please repair or replace them before
operating the unit again.
●
If you notice any unusual smells, noises, or any heat coming from the unit, please stop
the engine immediately, disengage the spark plug and ensure safe shutdown of the unit.
Once the machine has completely stopped, being careful to avoid burns, check for any
obstructions that may be interfering with the machine's operation
DANGER
WARNING
NOTICE
8

■Using the machine on slopes
When operating on slopes, serious accidents can be caused by operator slipping and the
machine rolling over. Be especially careful when working in such areas and stop operating
the machine immediately if you feel in any danger at all.
●
DO NOT operate the machine on slopes of more than 15°.
●
Mow across the face of slopes; never up and down. Exercise extreme caution when changing
direction on slopes.
●
When changing direction on a slope, do it slowly and carefully. The machine could roll over
causing injury and accidents.
●
DO NOT operate the machine on wet slopes. It is easy to slip on wet grass and suffer injury
and accidents.
●
Look out for holes in the ground and protruding tree roots. Also look out for obstructions that
could be hidden in long grass. The handlebars can be taken from your control, causing injury
and accidents.
●
When operating on slopes, DO NOT leave the machine with its clutch off or the speed change
lever in neutral. The machine could run out of control, causing injury and accidents.
■Children
When operating this machine, be particularly aware of children. Children are often
interested in mowers and may be drawn to you. As children may not be concentrating on
their surroundings, tragic accidents can occur if you take you eyes off them. Please observe
the following precautions at all times:
●
While operating, always keep more than 100 feet of distance between the machine and children
●
DO NOT allow children to come into the area where you are working. Make sure that young
children are securely in the care of an adult other than the operator.
●
Switch off the engine immediately if children enter the area where you are working.
●
DO NOT allow children to operate the machine. Furthermore, check and obey local law which
may place age limits on the operation of machinery.
●
Be careful when approaching blind corners, bushes, and trees which block your line of sight.
Such obstructions can hide children from view.
■Im
p
ortant messa
g
e to em
p
lo
y
ers
As an employer, you have special responsibilities to the people who work for you.
Before you ask anyone to operate this mower, you need to determine whether the person is
old enough, large enough, and strong enough to safely handle and control the mower.
If you decide he or she is, make sure the employee reads and understands all instructions
and warnings in this manual and on the labels before operating the mower.
Allow adequate time for hands-on training by a qualified instructor, and personally supervise
practice sessions until you feel sure the employee is ready to operate the machine.
Also be sure employees wear proper clothing and have eye protection and any other gear that
may be required by local ordinances or your insurance company.
Remember, too, that you are responsible for keeping the mower properly maintained and
in safe operating condition. Your commitment to safety on the job can help prevent injuries
and property damage.
WARNING
WARNING
WARNING
9

■Maintenance
●
Remove fuel when storing or transporting the machine. Accidents and damage can be caused
by spilt or expired fuel.
●
Be sure to switch off the engine and remove the spark plug cord before performing any
inspection, adjustment or maintenance on this machine.
●
When inspecting, repairing or adjusting the machine please wear protective gear to prevent injury.
●
When performing inspection, adjustment or maintenance, use tools such as a jack in order to
work as safely as possible.
●
Perform periodic inspection in order to work as safely as possible. If you discover any worn or
damaged parts, please replace them with recommended parts only.
●This machine is equipped with extremely sharp blades. When inspecting or handling the machine,
DO NOT directly touch the blades. Exercise caution by wearing gloves and wrapping the blades in
cloth. Furthermore, if you notice any abnormalities in the blades, do not try to repair them but
have them replaced. Not taking this precaution can cause injury and accidents.
●
Damage to the belt cover, blade cover, or flying debris prevention cover, could cause injury or
accidents. Be sure to have any damaged parts replaced before using the machine again.
●
Be sure to check that the covers of rotating parts are refitted correctly in their original positions
after being removed. Poorly fitted covers could open during operation and cause serious injury.
●
Please make sure that all components such as nuts and bolts have been properly secured
after maintenance.
●
Perform comprehensive inspection and adjustment of such parts as drive clutch, blade clutch,
brake, throttle, and gear change.
●
Be sure to check that the bolts in the wheels and blades are tightly fastened. Make sure that the
detachable cover used for changing the blades is closed before operating the machine.
●
When replacing the blades, also replace the attached nuts and bolts. There is a possibility of
accidents caused by worn or damaged parts. Never substitute nuts and bolts with those that are
not recommended.
●
When storing the unit, please do so on a level surface and in a vented place away from open
flame.Failure to do so may result in injury or accident.
●
When rubber fuel lines become old, they can split and dangerous fuel leaks can occur. Change
rubber parts if they split or every 3 years regardless of damage. At this time, also change the
fastening bands for the new parts.
●
Before storing the machine, remove any material such grass and leaves. Clean away any
spilt oil or fragments stained with oil.
●
Make sure that the engine has completely cooled before covering the machine with a storage
cover.
Depending on operating conditions, there may be occasions when incidents arise which are
not covered by the warnings of this manual. The operator should use common sense and put
safety first when using this machine.
WARNING
DANGER
NOTICE
10

2. MOWER Controls and Features
Note: The model shown in the figure below may looks slightly different from your machine.
1: DRIVE CLUTCH LEVER
(p.20)
5: SPEED CHANGE
LEVER (p.20)
3: BLADE CONTROL LEVER
(p.20)
FRONT BUMPER
(p.14)
4: THROTTLE LEVER
6: REAR CUTTING HEIGHT
ADJUSTMENT LEVER(S)
(p.19)
2: BLADE SAFETY LOCK
(p.20)
8: GRASS BAG
(p.14)
DISCHARGE
GUARD
7: FRONT CUTTING HEIGHT
ADJUSTMENT LEVER(S)
(p.19)
SPARK PLUG CAP
MUFFLER
OIL FILLER CAP /
DIPSTICK
CARBURETOR
FUEL VALVE
(p.17)
FUEL CAP
(p.16)
AIR CLEANER
(p.24)
11

1 : Drive clutch lever [ON] / [OFF]
Turns power on and off between the engine and the drivetrain
Push this lever forward to begin driving the machine
Release your hand from the lever to stop the machine
2 : Blade safety lock, 3 : Blade control lever
Turns power on and off between the engine and blades.
To Engage the Blade:
1.Push the blade safety lock forward.
2. While pushing the Blade safety lock, pull back the Blade control lever
To Stop the Blade:
3. Release the Blade safety lock.
4. Release your hand from the Blade control lever
4 : Throttle lever
The throttle lever adjusts the rotating speed of the engine. It also acts as the choke when
starting the engine and the switch for stopping the engine.
The [STOP], [LOW], [HI], and [CHOKE] settings are located along the guide.
5 : Speed change lever
GR537Pro
This lever changes the drive speed. It can operate in three forward speeds: [1] [2] [3]
To change speeds, release the drive clutch lever and move it to the desired position.
GRH537Pro
This lever changes the variable drive speed from 0 up to 4 mph.
Slide the Speed change lever forward to increase speed.
Operator may change speeds while driving
6 : Rear cuttin
g
hei
g
ht ad
j
ustment lever
(
2
)
7 : Front cutting height adjustment lever(2)
This lever adjusts the height at which grass is cut.
Pull the adjustment lever toward the wheel and then lock it in the desired position
9 : Grass bag
Catches the cut grass.
Pull the Discharge guard up then hook the Grass bag to the end of the deck.
12

3, How to Assemble Machine
●
Assembly should be done on a flat surface.
●
This machine does NOT contain motor oil. Please fill with the proper motor oil after assembly.
(pg.22)
●
Dispose of the packaging materials in accordance with all federal, state, and local regulations.
■Packa
g
e contents list
Manual Phillips-head Screw driver
10/12mm Wrench Plug Wrench
Nut Set, Handle Brace(M8) Handle Brace
Handle Setting Bolt (M8X35)
Mini Hex. Bolt (M8X25)
Bolt&nut set, Front Bumper(M8) Front Bumper
Bolt & Nut set, Side Plate(L),（R)
Side Plate Attach(M6)
Grass Bag Grass Bag Frame
Cable ties
11
11
part
quantity
part
quantity
1
1 set 2
1
1 set1 set
1 set
1
2
NOTICE
X 6 X 6 X 6
X 2
X 2
X 4 X 4
X 2X 2
X 2
H
B
S
13

■Install the Handle
1.
Insert the Hex. Bolt(M8x25) in to the
deck the inside. Slide handle brace
on to hex. bolt
2.
Hook the Handle pin into the hole at the
Handle Brace.Insert the Handle Setting
Bolt(M8x35) through the Handle and
Handle Brace.
3.
Fix all bolts using Nut set (H) and
10/12mm wrench
■Install the Front Bum
p
e
r
1.
Insert the Bolt(B) in to the Front Bumper
from the bottom. Slide bolts throu
g
h
the holes in attachment plate
2.
Attach nuts and washers to bolts
on the attachiment plate.
3.
Tighten the bolts and nuts.
■Install the Side Plates
1.
Place the Side Plate(L) and Side Plate(R )
inside of Rear Guard
2.
Insert the Bolts(S) from inside out.
Attach nut(S)on the other side.
3.
Tighten the bolts and nuts
■Assemble Grass Ba
g
1.
Insert the Ba
g
Frame into the Grass Ba
g
as shown at left
2.
Push each point into the plastic edge
of the Grass Bag
BAG FRAME
PLASTIC EDGE
SIDE PLATE (R)
SIDE PLATE (L)
REAR GUARD
BOLT, SIDE PLATE
NUT, SIDE PLATE
BOLTS (M8)
HANDLE SETTING BOLT
(M8X35)
MINI HEX. BOLT
(M8X25)
NUT SET,
HANDLE BRACE (M8) HANDLE BRACE
HOLE
HOOK
NUTS, WASHER
(M8)
FRONT BUNPER
H
H
B
B
S
14

4, Before Operation
●
Be sure to do a delivery inspection before operating the unit.
●
Your safety is your responsibility. Correct preparation will significantly
reduce your risk of injury.
●
Read and understand this manual. Know what the controls do and how to operate them.
●
Familiarize yourself with the lawn mower and its operation before you begin using it.
Know how to shut off the lawn mower quickly in case of an emergency.
●
For your safety, and to maximize the service life of your lawn mower, it is very
important to take a few moments before you operate the lawn mower to check
its condition. Be sure to take care of any problem you find or have your service
dealer correct it before you operate the lawn mower.
●
Improperly maintaining this lawn mower or failing to correct a problem before operation could
cause a malfunction in which you could be seriously injured. Always perform a pre-operation
inspection before each operation and correct any problems you find.
■Check
y
our machine
●
Look around and underneath the lawn mower for signs of oil or gasoline leaks.
●
Look for signs of damage.
●
Check each control for proper operation.
●
Check the blades for wear. Replace as necessary. (pg. 28)
●
Check that the blade bolts are tight.
●
Make sure there are no tears or other damage to the grass bag
●
Check that all nuts,bolt,and screws are tightened.
■Check
y
our mowin
g
area
●
Anything that can be picked up by the blades and thrown is a potential hazard to you and others.
Look for things like stones, sticks, nails, and wire, and remove them from the work area.
●
People and animals near the work area can move into your lawn mower's path or into a position
where they could be struck by thrown objects. Clear the area of pets and people, especially
children. Their safety is your responsibility.
●
Check the condition of the grass. Adjust your lawn mower ground speed and mowing swath
accordingly.
■Check the engine
Place the machine on a flat surface and then check the engine oil, fuel and air cleaner using
the procedures below.
●
This machine does NOT contain engine oil when shipped out. Be sure to add oil before starting
the engine, even if there are traces of residual oil left over in the engine from factory testing.
●
Engine oil: SAE10W-30、0.74qt.(0.7Liter)
●
Burn Danger: Make sure the engine has cooled before inspecting.
NOTICE
WARNING
WARNING
15

●
Check engine oil
1. Use the dipstick to check the oil level.
When measuring with the dipstick, do
not screw it in place.
2. If the oil does not lie between the
upper level and lower level, replenish
to bring the oil to the upper level.
Take care not to overfill with oil.
●
Check fuel
●
Under no circumstances should you smoke, operate firearms, or use any open flame while using
gasoline. Also, please be careful of static electricity as gasoline is extremely flammable
In addition, gasoline is highly volatile and may cause fire or an explosion
●
Please refuel in a place that can be well ventilated. As gasoline is a highly volatile substance,
there is a danger that you will feel unwell if you operate the machine in a poorly ventilated place.
●
When refueling, be sure to stop the engine and allow it to cool down. There is a danger of
suffering burns.
●
When refueling, be sure not to fill the fuel tank over the maximum level. If you do overfill the fuel
tank, remove fuel until it sits below the maximum level. Over-fueling can cause fire and other
accidents.
●
After refueling, securely close the fuel cap and store the machine in a safe place with no sources
of flame. There is a danger of fire.
●
If gasoline is spilled, move the machine a safe distance away without starting the engine.
Starting the machine in close proximity to spilled fuel could result in fire or other accident.
Use a cloth to wipe away waste gasoline and dispose of any such cloth in a suitable manner.
1.
Remove the fuel cap
2.
Refuel the fuel tank with unleaded
gasoline.Take care not to overfill with
gasoline.
(Please refer to the engine use manual)
3.
After refueling, tighten the fuel tank cap
until it clicks.
FUEL UPPER
LEVEL INDICATOR
DANGER
WARNING
FUEL CAP
DIP STICK
UPPER LEVEL
LOWER LEVEL
16

5, How to Operate
1) How to start and stop the engine
(Please refer to the engine use manual)
■How to start the engine
●
DO NOT start the engine in a confined space or in an area with insufficient ventilation.
Engine exhaust is odorless and contains carbon monoxide which can cause death.
Make sure that the drive clutch lever and blade clutch lever are released [OFF].
2.
●
Please warm up the eingine for approximately 2 minutes with throttle in [ (LOW)] position.
4.
Grip the starter knob, pull slowly until you feel
tension and then pull strongly from this position.
Immediately after the engine has started, slowly
return the start knob to its original position.
2.
30 seconds after the engine starts, move
the throttle lever to [HI] position when
mowing, or [LOW] position when idle.
Push the throttle lever all the way forward
to set to the choke position.
When the engine has finished warming up,
shift to the full throttle HI position
1.
3.
Shift the fuel valve to the [ON] position.
DANGER
NOTICE
FUEL VALVE
THROTTLE LEVER choke
LOW
HI
ON
17

■How to stop the engine
●
DO NOT touch the hot engine immediately after switching off.
Allow time for it to cool down as there is a burn danger
Shift the throttle lever to the [Stop] position
to stop the engine. Shift the fuel valve to the [OFF] position.
2.1.
WARNING
STOP
OFF
18

2) Operating the controls for mowing
●
Confirm that the area around you is safe before driving the machine.
―Exercise sufficient caution when operating the machine on soft ground. If driving the machine
alongside ditches or the edges of paths, there is a danger that the weight of
the machine could cause the ground to collapse.
―DO NOT operate the machine on slopes of more than 15°. There is a danger of the machine
rolling over or running out of control.
■Preparing to mow
Adjusting Cutting Height
Attach/Remove the Grass bag
●
During normal use, the grass bag material is subject to deterioration and wear.
●
Frequently inspect the grass bag for tears, holes, and excessive wear.
●
Check for necessary replacement. Make sure the new bag meets the original specifications.
Set all four Adjustment Levers to the
same height.
1.
Attach:
Hang the hook of the bag frame on the
edge of the deck. Make sure it is stable.
Pull the Adjustment Lever toward the
wheel, then choose your desired position.
2.
2.
1.
Remove:
Pull up the Discharge guard. Hold the bag
frame then remove it from above. Return
the Discharge guard to its original position.
WARNING
NOTICE
ADJUSTMENT LEVER (4)
ADJUSTMENT LEVER (4)
HOOK BAG FRAME
19

■Operating the controls for mowing
Please read the safety guidelines again (pps. 4-10) and check the precautions related to your work
environment and safety.
●
When using the machine for the first time, choose a flat area free from rocks and foreign
objects and slowly cut a path by going over the area in a straight line.
●
If the engine stops dues to a large quantity of grass, reduce your work speed and increase the
cutting height before mowing for a second time.
●
If debris is frequently thrown from the blade cover, raise cutting height.
●
Start in speed 1 and then work at a speed suited for your surroundings after checking
that the area around you is safe.
●
Always be sure to release the blade clutch [OFF] when turning. Not doing so may cause
injuries or accidents.
●
DO NOT try to change speeds with the drive clutch lever [ON] as this can cause injuries
and accidents.
3.
2.1.
Start the engine, then slide the throttle lever
to the [HI] position.
Choose your desired speed
GR537Pro: 3 speeds.
GRH537Pro: Vary the speed by sliding
the speed change lever forward.
Press the Blade Safety Lock forward and
hold, then pull back the Blade Control Lever.
Caution: Blade rotation will start
immediately.
4.
Push the Drive Clutch Lever forward and
then hold it to the handle.The machine
will start driving.
NOTICE
WARNING
HI
SPEED CHANGE
LEVER
1ST
2ST
3ST
BLADE CONTROL LEVER
DRIVE CLUTCH LEVER
BRADE SAFETY LOCK
20