4HP
PETROL
LAWN MOWER
RL504
INSTRUCTION MANUAL
Code: RL504 IM
Date: 070421
Black
Cyan
Magenta
Yellow
Edition: 13
Op: GM
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Introduction
Description of symbols
Your new GMC power tool will more than satisfy
your expectations. It has been manufactured under
stringent GMC Quality Standards to meet superior
performance criteria.
The rating plate on your tool may show symbols.
These represent important information about the
product or instructions on its use.
Conforms to relevant standards
for electromagnetic compatibility.
You will find your new tool easy and safe to operate,
and, with proper care, it will give you many years
of dependable service.
Wear hearing protection.
Wear eye protection.
Wear breathing protection.
CAUTION. Carefully read through this entire Instruction
Manual before using your new GMC Power Tool. Take
special care to heed the Cautions and Warnings.
Wear safety footwear.
Wear safety gloves.
Your GMC power tool has many features that will make
your job faster and easier. Safety, performance, and
dependability have been given top priority in the
development of this tool, making it easy to maintain
and operate.
Warning.
Read these instructions for use carefully.
Environmental protection
Recycle unwanted materials instead
of disposing of them as waste. All tools,
hoses and packaging should be sorted,
taken to the local recycling centre and
disposed of in an environmentally safe way.
Use at a distance of at least 15m
from other people.
Thrown objects and rotating blades
can cause severe injury.
Noise label rating 75dBA
(taken at 7.5 meters) you must wear
Explosive material.
��
ear protection at all times.
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Extremely hot surface. Do not touch a hot muffler,
gear box or cylinder, you may get burned. These
parts get extremely hot from operation and remain
hot for a short time after the unit is turned off.
Caution before carrying out any operation stop the
engine and disconnect the spark plug cap.
Caution. Risk of hand and feet injuries
3
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Preparation
Specifications
Engine:
• While mowing, always wear sturdy footwear and long
trousers. Do not operate the equipment when barefoot
or wearing open sandals.
Briggs & Stratton 4HP, 4 Stroke
0 – 3000min-1
Speed:
• Thoroughly inspect the area where the equipment is to be
used and remove all objects which may be thrown by the
machine or damage the cutter assembly and the engine
(stones, sticks, metal wire, bones, etc.)
Width of cut:
Blades:
18" 460mm
4 Swing back
Height adjustment:
10 Levels, 15 – 70mm
• WARNING: DANGER! Engine fuel is highly flammable:
Grass catcher capacity: 55L
Equivalent Spark plugs: CHAMPION RJ19LM
DENSO W9LMR-US
– Store fuel in containers specifically designed for this purpose.
– Refuel using a funnel and outdoors only. Do not smoke
while refuelling or whenever handling the fuel.
– Add fuel before starting the engine. Never remove the cap
of the fuel tank or add fuel while the engine is running or
when the engine is hot.
NGK BR2LM
Weight:
32.5kg
– If fuel is spilled, do not attempt to start the engine but
move the machine away from the area of spillage and
avoid creating any source of ignition until the fuel has
evaporated and the vapour dispersed.
Noise label rating 75dBA (taken at 7.5 meters) you must wear ear
protection at all times.
Safety rules for petrol lawn mowers
Training
– Replace all fuel tanks and containers caps securely.
• Substitute faulty silencers.
• Read the instructions carefully. Get familiar with the
controls and proper use of the equipment.
• Before use, always inspect the machine, especially the
condition of the blades, and check that the screws and
cutting assembly are not worn or damaged. Replace worn or
damaged blades and screws in sets to preserve balance.
• Only use the lawn mower for the purpose for which it was
designed, i.e. for cutting and collecting grass. Any other
use can be hazardous, causing damage to the machine.
• Never allow children or people unfamiliar with these
instructions to use the lawn mower. Local regulations may
restrict the age of the operator.
• Discharge openings must be guarded at all times. Do not
remove the discharge guard or hold it up while mowing.
• It is advisable to wear suitable eye protection when
operating the mower.
• Never use the lawn mower:
– When people, especially children, or pets are nearby.
Operation
– If the operator has taken medicine or substances that
can affect his ability to react and concentrate.
• Do not operate the engine in a confined space where
dangerous carbon monoxide fumes can collect.
• Remember that the operator or user is responsible
for accidents or hazards occurring to other people
or their property.
• Mow only in daylight or good artificial light.
• If possible, avoid operating the equipment in wet grass.
• Always be sure of your footing on slopes.
4
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• Walk, never run and do not allow yourself to be pulled
along by the lawn mower.
– If the lawn mower starts to vibrate abnormally (find and
remove the cause of the vibration immediately).
• Mow across the face of slopes, never up and down.
• Exercise extreme caution when changing direction on slopes.
• Do not mow on slopes of more than 20°.
• Stop the engine:
– Whenever you leave the lawn mower unattended.
Remove the key from models with electric starters.
– Before refuelling.
• Exercise extreme caution when pulling the lawn-mower
towards you.
– Every time you remove or replace the grass-catcher.
• Stop the blade if the lawn mower has to be tilted for
transportation when crossing surfaces other than grass,
and when transporting the lawn mower to and from the
area to be mowed.
• Reduce the throttle before turning off the engine and turn
the fuel off when you have finished mowing, following the
instructions in the engine handbook.
• When mowing, always keep to a safe distance from the
rotating blade. This distance is the length of the handle.
• Never operate the lawn mower with defective guards, or
without safety devices, such as the stoneguard and/or
grass-catcher, in place.
• Never cut grass while walking backwards.
• Stop the engine before pushing mower across gravel
drives, walks or roads.
• Do not change the engine governor settings or over
speed the engine.
Maintenance and storage
• On power-driven models, disengage the drive clutch
before starting the engine.
• Keep all nuts, bolts and screws tight to be sure the
equipment is in safe working condition. Regular
maintenance is essential for safety and performance.
• Start the engine carefully, following the instructions and
keeping feet well away from the blade.
• Never store the equipment with fuel in the tank inside a
building where vapour may reach a flame or a spark or a
source of extreme heat.
• Do not tilt the lawn mower when starting the engine.
Start the engine on a flat surface that is free of obstacles
and tall grass.
• Allow the engine to cool before storing in an enclosed
space.
• Do not put hands or feet near or under rotating parts.
Keep clear of the discharge opening at all times.
• To reduce the fire hazard, keep the engine, exhaust
silencer, battery compartment and fuel storage area
free of grass, leaves, or excessive grease. Do not leave
containers with grass cuttings in rooms.
• Never pick up or carry a lawn mower while the engine
is running.
• Stop the engine and disconnect the spark plug wire:
– Before carrying out any work underneath the cutting deck
or before unclogging the chute;
• Check the stone-guard and grass-catcher frequently for
wear and deterioration.
– Before checking, cleaning or working on lawn mower;
• If the fuel tank has to be drained, this should be done
outdoors and when the engine is cool.
– After striking a foreign object. Inspect the lawn mower for
damage and make repairs before restarting and operating
the lawn mower;
• Wear strong work gloves when removing and
reassembling the blade.
5
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• Check the blade’s balance after sharpening.
• For reasons of safety, do not use the equipment with
worn or damaged parts. Parts are to be replaced and
not repaired. Parts that are not of the same quality can
damage the equipment and be dangerous for your safety.
• Whenever the machine is to be handled, transported or
tilted you must:
– wear strong working gloves;
– grasp the machine at the points that offer a safe grip,
taking account of the weight and its distribution.
• Damaged blades and worn bolts are major hazards.
Unpacking
Due to modern mass production techniques, it is unlikely
that your GMC Power Tool is faulty or that a part is missing.
If you find anything wrong, do not operate the tool until the
parts have been replaced or the fault has been rectified.
Failure to do so could result in serious personal injury.
Contents of carton
• Handle bar locking knobs, with bolts and washers x2
• Catcher
6
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1
Know your product
1. Handle bar
14
8. Oil filler cap
2. Lower handle
9. Recoil starter
10. Spark plug cap
11. Air filter
3. Throttle Lever
4. Discharge guard
5. Grass catcher
12. Primer bulb
3
2
6. Height adjustment lever
7. Fuel tank cap
13. Handle bar locking knob
14. Brake Lever
13
5
4
8
9
6
11
10
7
12
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Assembly
Attaching the Handles
It is necessary to fit the lower handle (2), handle bar (1),
and catcher (5) to the mower.
It is necessary to attach both the lower handle and
handle bars.
Assembling the catcher
1. To attach the lower handle,
first use a spanner to
remove the 4 bolts.
1. The grass catcher (5) is supplied
in two sections. Locate the top
half on top of the bottom half
and interlock them together by
aligning the lugs and slots and
pushing the halves together until
they click into place.
2. Place the lower handle in
position and replace the 4 bolts.
Use the spanner to retighten
the nuts.
3. To attach the handle bar,
first remove the two handle
bar locking knobs (13).
Attaching the catcher
1. Lift the discharge guard (4) in
order to position the catcher.
1
2. While lifting the discharge
guard, slide the catcher
into position in adownwards
direction (Fig. 1).
3. Push the catcher down until it
locks into place (Fig. 2).
4. Release the discharge guard to secure the catcher in
place between the 2 ribbed locking notches (Fig. 3).
4. Position the handle bar over the lower handle
and insert the two locking knobs, and tighten
to secure the handles together.
Note. Always empty the catcher before it has reached maximum
2
3
Cutting height adjustment
The GMC mower has one lever to easily adjust the
cutting height.
There are 10 height settings.
1. To decrease the cutting height
pull the height adjustment
lever (6) out and move it up a
notch, towards the handlebar.
capacity, otherwise it will decrease the performance of the mower.
2. To increase the cutting height
pull the lever out and move it
down a notch, towards
the motor.
8
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filled with the right amount of correct grade oil. Refer to
the oil recommendations section of the Briggs & Stratton
instruction manual for this information.
Note. If you are unsure of which cutting height to use, begin
with a high setting and trial a small section of lawn, then
check the appearance of the lawn. Then readjust if necessary
1. Move the lawn mower to a
level surface and clean around
the oil filter cap (8) .
Brake lever
The mower is equip with a brake
lever (14) to improve the safety of
the mower.
During operation the brake lever
must be held, if it is let go the
engine will automatically stop.
To start the lawn mower you
must hold the brake lever to the
handle bar.
2. Remove the oil filter cap with
dipstick and wipe it with a
clean cloth. Replace it and
retighten the cap.
3. Remove the dipstick again and
check the oil level, the oil should
be at the full mark.
4. If oil is required add it slowly
(the oil capacity is about
0.6 litre), do not over fill.
Fuelling
Note. Use fresh unleaded petrol.
1. Unscrew the fuel tank cap (7)
and pour the unleaded petrol
into the tank with the aid of
a funnel.
5. Retighten the oil filter cap firmly
before starting the engine.
Starting the engine
Note. Before starting the mower
check the oil and fuel levels.
2. Fill the tank to approximately
2.5 cm below the lowest
portion of the neck to allow for
fuel expansion.
K
Cold
Start
1. Move the
throttle lever (3)
to the cold start
position.
Cold Start
Run
Be careful not to over fill.
3. Be careful not to spill any petrol, if this happens, wipe the
spill with a clean rag.
2. Push the primer
bulb firmly
Hot
Start
4. Start the engine at least three meters away from the area
where the fuel tank has been filled in order to avoid the
risk of fire.
5 times (for
initial starting)
or 3 times (for
engine starting
thereafter).
L
WARNING. Never attempt to refuel the engine while it is
running or still warm, allow it to cool before fuelling.
Note. For further information refer to the Fuel
Recommendations section in the Briggs & Stratton
instruction manual.
3. Disengage the brake by
pulling the brake lever (14)
toward the handle. Letting
go of the lever will prevent
the mower from starting or
Checking the oil
CAUTION. The lawn mower is shipped without oil. Do
not start your lawn mower before ensuring it has been
will stop the engine, if running.
9
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2. Sharp blades cut cleanly and efficiently, if the blade is dull
it will tear the grass. This will result in the ends turning
brown. When the blades no longer cut cleanly either
sharpen them or replace them.
3. To safely operate the mower ensure all four wheels are
on the ground and be careful not to loose your footing
or control of the mower. Be very careful when mowing
uneven or rough ground. Keep a firm grip on the handle
bar at all times, always walk, never run with the mower.
4. While holding the brake lever inward pull the recoil starter
(9) lightly until you feel resistance then pull quickly until
the engine starts. Do not pull the cord with a jerk or
release it until fully rewound.
4. For healthy growth, grass should not be cut too short.
This can cause damage to the grass and allow weeds
to develop.
5. Vary your cutting pattern from week to week, this will
help to prevent matting and graining of the grass.
5. Once the lawn mower has started and warmed up move
the throttle lever to the Run position while continuing to
hold the brake lever.
6. Before checking a clogged mower deck stop the engine
completely and disconnect the spark plug lead and then
tilt the mower so the air filter side is facing upwards.
Use a stick the clear any clogged material, never use
your hands.
Stopping the engine
To stop the engine reduce the speed of the engine by
pulling the throttle lever (3) towards the tortoise and
release the brake lever (14). In an emergency just release
the brake lever.
7. Mowing wet grass should be avoided. Wet grass will
clog the mower deck and if it is slippery you may loose
your footing.
Cold Start
8. Always mow across slopes not up and down them.
Be extra careful if the grass is wet as this could cause
you to slip and loose control of the mower.
Run
9. If the ground is to dry, mowing will stir up a lot of dust
which may clog the air filter. In these conditions it is
recommended to water your lawn the day before mowing.
Hot
Start
10. Use the side of the mower as a guide to cut close to
large objects such as a fence or a wall. Be careful when
mowing over obstacles embedded in the lawn such as
sprinkler systems and paving, avoid anything that sticks
up above the surface of the lawn.
Mowing advice
1. It is recommended to use the fast throttle setting and
keep the engine running at maximum speed. This will
deliver the best cut. If the speed of the engine slows this
could indicate the mower is being overloaded, by trying to
cut to much grass. Try mowing a narrower strip, mowing
slower or raise the cutting height.
11. Avoid mowing over loose stones, gravel and other
landscaping material as this can be picked up by the
mower and flung out causing serious personal injury.
10
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12. If the blades do come into contact with something or the
mower starts to vibrate stop the engine immediately,
remove the spark plug lead and inspect to see if there
is any damage.
5. Replace all 4 blades to
ensure a smooth even cut.
By replacing the washer, then
the half washer, then the nut
securing the blade firmly,
(25 – 30Nm) repeat this for
the other 3 blades.
Emptying the grass catcher
Note. Before making any adjustment or maintenance
procedures to the mower ensure it is turned off and the
spark plug lead is removed.
To remove the catcher, raise the guard while lifting the
catcher to dislodge it from the hooks.
6. Replace the blade disc and
retighten the central blade bolt
tightly (50 – 59Nm).
Note. Use a wooden block to stop the blade from turning.
The 4 blades should be tightened fully but check to ensure
they can still swing back if they were to hit a solid object.
WARNING. Check the catcher frequently for cracks and
wear and replace it if damaged.
Do not leave clippings in the catcher for extended periods.
Where required tighten the bolts with a torque wrench,
the centre disc blade bolt torque: 50 – 59Nm and the four
blades torque: 25 – 30Nm.
Replacing the blades
Note. Before making any adjustment or maintenance
procedures to the mower ensure it is turned off and the
spark plug lead is removed.
If you do not have a torque wrench ask a mower service
dealer to tighten the blade bolts before you use the mower.
WARNING. If the blade bolts are not tightened correctly
they could loosen and/or come out and it would be possible
for the blades to fly off while you are operating the mower.
Note. Wear heavy gloves to protect your hands.
1. Tilt the mower back so the spark plug is facing up.
2. Remove the blade disc with a spanner to remove the
central blade bolt first.
Maintenance
For all maintenance information refer to the Briggs &
Stratton instruction manual.
3. Remove all 4 single blades including the washer
and nuts.
4. Clean dirt and grass from around the blade mounting area.
11
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GMC customer assist
If your product needs repairing, replacing,
technical service or you simply need help or advice,
please contact us on our Customer Assist Line
1300 880 001 (Australia) or 0800 445 721 (New Zealand).
For prompt service we suggest you log your service request
access to the Internet, please contact our service department
on 1300 880 001 (Australia) or 0800 445 721 (New Zealand).
7am –7pm, 7days a week (AEST).
Please note that if repair or replacement is required,
you must provide a valid original purchase receipt.
You will need the following details at hand to log your service request;
Personal details: First & Last name, address, pick up address,
contact phone numbers, email address
Product details: Product number, date of purchase, retailer bought from,
State & postcode, receipt number, reason for the request,
copy of official purchase receipt
Attach your purchase receipt and save with this Manual for future reference.
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