Yard force GT A42 User manual

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Model: GT A42
OPERATOR’S MANUAL
PETROL BRUSH CUTTER
WARNING!
Read this manual carefully before using your brush cutter and keep it
in a safe place for future reference.

2
GT A42 OPERATING MANUAL
TABLE OF CONTENTS
WELCOME
Thank you for choosing to buy a YARDFORCE brush cutter.
All our products are manufactured to the highest standards of performance
and safety.
Please read this operator’s manual carefully.
WELCOME ......................................................................2
TABLE OF CONTENTS .................................................2
INTENDED USE .............................................................3
TECHNICAL SPECIFICATIONS ...................................3
PARTS IDENTIFICATION ..............................................4
SCOPE OF DELIVERY ..................................................5
SAFETY INFORMATION ...............................................6
PREPARATION ...............................................................10
OPERATION ...................................................................15
MAINTENANCE ..............................................................19
TROUBLESHOOTING ...................................................20
STORAGE .......................................................................21
WARRANTY ....................................................................22

3
INTENDED USE
TECHNICAL SPECIFICATIONS
This tool is designed for the following applications:
- Brush cutter (when tted with metal circular blade)
The brush cutter is intended to cut weed and climbing plants. Do not use it
for other purposes that it was not intended. Example, never use it for cutting
wood. Never cut objects with a diameter exceeding 13mm.
- Grass trimmer (when tted with nylon line cutting head)
The grass trimmer is intended for trimming grass. Do not use it for other
purposes.
Note: This tool is designed for domestic use. It is not designed for or
warranted for use in commercial, trade or industrial applications.
Model GT A42
Engine Type 2-Stroke Euro V
Displacement 33 cc
Max. Cutting speed 7000 rpm
Rated Power 0.9 kw
Metal Blade size 1.4 x 255 x 25.4 mm
Max. Cutting Capacity Ø 13 mm
Nylon Line Cutting Head (Max. Cut) 420 mm
Nylon LIne size 2 mm
Fuel Capacity 0.7 L
Fuel/Oil Ratio 40:1
Easy Start Yes
Net Weight 8 kg
USE FRESH UNLEADED FUEL (PETROL), 90
OCTANE OR BETTER – Do NOT use E10 or
Ethanol blends.
Mix with a premium grade air cooled 2 stroke oil
at a ratio of 40:1
40:1

4
PARTS IDENTIFICATION
1
9
10
11
12
13
14
16
2
4
5
6
7
8
3
1. Spark plug.
2. Starter.
3. Fuel cap.
4. Air lter.
5. Strap attachment point.
6. Left handle.
7. Shaft joint clamp.
8. Guard.
9. Cutting Head.
10. Cutting blade.
11. Right handle.
12. Throttle lever.
13. Throttle lock button.
14. ON /OFF switch.
15. Throttle interlock.
16. Control cable.
15

5
SCOPE OF DELIVERY
A. Engine, upper shaft and
right handle assembly.
B. Lower shaft.
C. Left handle.
D. Guard.
E. Line trimmer spool.
F. Metal cutting blade.
G. Shoulder belt.
H. Bracket for guard.
I. Hex keys,1 x 4mm,
1 x 5mm.
J. Spark plug spanner.
●Remove all packing material.
●Check the completeness of the package content.
●Check the tool and its accessories for transportation damage.
WARNING! Danger of su󰀨ocating! Packing materials are not toys!
Children must not play with plastic bags!
IF ANY PARTS ARE MISSING OR DAMAGED,
PLEASE CONTACT ACTION SPARES 1300 418 640
Recycle/dispose of packaging materials in accordance to the regulations
and requirements of your local council.
A
B
C
D
J
GH
I
E
F

6
SAFETY INFORMATION
GENERAL
WHEN using the product, a few safety precautions must be observed to avoid
injuries and damage to the product.
READ the operating instructions carefully and comply with them at all times.
KEEP this manual in a safe place so that the information is readily available at
all times.
IF you give the equipment to another person it is important for them to read
the operating instructions prior to use.
DESCRIPTION OF SYMBOLS
Symbols are used in this manual and/or on the product to attract your attention
to possible risks. These symbols and the explanations that accompany them
must be understood.
WARNING! To reduce the risk of injury all users must read the
operator’s manual before using the product.
Risk of ying debris.
Keep bystanders away at least 15 metres.
WARNING! or CAUTION! This symbol before a safety comment
indicates a precaution, warning or danger.
Ignoring these warnings can lead to an accident for yourself or for
others. To limit the risk of injury, re or electrocution always follow the
recommendations indicated.
Wearing eye, ear and head protection.
Do NOT use saw blades.
Wear gloves while using.
Wear sturdy footwear.

7
Australian regulatory compliance mark.
SAFETY INSTRUCTIONS
TRAINING
A. Read the instructions carefully. Get familiar with the controls and
proper use of the tool.
B. Only use the tool for the purpose for which it was designed. Any
other use can be hazardous and may also cause damage to the tool.
C. Never allow children or people unfamiliar with these instructions to
use the tool. Local regulations may restrict the age of the operator.
D. Never use the tool:
• When people, especially children, or pets are nearby.
• If the operator has taken medicine or substances that can
a󰀨ect his ability to react and concentrate.
E. Remember that the operator or user is responsible for accidents or
hazards occurring to other people or their property.
WARNING! Proper safety precautions must be observed. Like
all power equipment this tool must be handled carefully. DO NOT
EXPOSE YOURSELF OR OTHERS TO DANGER. Follow these
general rules. Do not permit others to use this tool unless they are
trained in its operation.
WARNING! THIS TOOL CAN CAUSE SERIOUS INJURIES. Read
the instructions carefully for the correct handling, preparation,
maintenance, starting and stopping of the tool. Be familiar with all
controls and the proper use of the tool.
GENERAL SAFETY INSTRUCTIONS
A. Never allow children to use the tool.
B. Beware of overhead power lines.
C. Do not use the tool while people or children are nearby. Keep at
least 15 metres away.
D. Dress properly! Do not wear loose clothing or jewellery, which can be
caught in moving parts.
E. Use of sturdy gloves, nonskid footwear hearing protection and safety
glasses.
F. Use extra care when handling fuels. They are ammable and the
vapours are explosive.

8
G. The following points should be observed:
• Use only an approved fuel container.
• Never remove the fuel cap or add fuel with the engine
running.
• Allow engine and exhaust components to cool down before
refuelling.
• Do not smoke.
• Never refuel indoors.
• Never store the tool or fuel container inside where there is an
open ame, such as near a water heater.
• If fuel is spilled, do not attempt to start the engine, move the
tool away from the spillage before starting.
• Always replace and securely tighten the fuel cap after
refuelling.
H. If the tool starts making any unusual noise or vibration. Turn OFF the
engine and allow the tool to stop and take the following steps:
• Inspect for damage:
• Check for and tighten any loose parts;
• Have any damaged parts replaced repaired with parts having
equivalent specications
WHEN USING THE TOOL
A. Stop the engine before:
• Cleaning or when clearing a blockage.
• Checking, carrying out maintenance or working on the tool.
• Adjusting the working position of the cutting device.
• Leaving the tool unattended.
B. Ensure that the tool is correctly located in a designated working
position before starting the engine.
C. While operating the tool always ensure that the operating position is
safe and secure, especially when using steps or a ladder.
D. To reduce re hazards keep the engine and silencer free of debris,
leaves and excessive lubricant.
E. Always ensure that all handles and guards are tted when using the
tool. Never attempt to use an incomplete tool or one tted with an
unauthorised modication.
F. Always be aware of your surroundings and stay alert for possible
hazards of which you may not be aware due to the noise of the tool.
G. Keep fuel in a suitable container specially made for this purpose.

9
WARNING! Dress appropriately.
WARNING! Beware of kickback.
ADDITIONAL SAFETY RULES FOR PETROL BRUSH CUTTER
A. Always use the brush cutter with the shoulder strap.
B. Do NOT use saw blades. Use only blades designed for use with
brush cutters.
C. Do not operate with loose clothing or long hair. These can be sucked
into the air intake of the tool.
D. While using, always wear sturdy footwear and long trousers. Do not
operate the equipment with bare feet or open sandals.
E. Do not operate in a hazardous location. Such areas include where
there is a risk of explosion of fumes, leaking gas or explosive dust.
F. Do not operate in a conned area. Exhaust gases, smoke or fumes
could reach dangerous concentrations.
G. Protect your tool. This tool is NOT WEATHERPROOF and should
not be exposed to direct sunlight, high ambient temperature and
damp, wet or high humidity conditions.
H. Do not smoke or use a mobile phone while refuelling. This is
potentially dangerous as it may ignite the fuel and cause an
explosion.
I. Take care not to spill fuel. When refuelling the tool ensure that the
engine has been switched o󰀨. Prevent the spilling of fuel as this
may also ignite with the hot engine. Never refuel whilst the engine is
running.
J. Be careful where you store the tool. Store the tool in a dry area away
from ammable liquids.
K. Keep your distance. The tool emits exhaust fumes.
L. Ensure you use fuel oil mix. Ensure that you mix 40 parts unleaded
fuel to 1 part two stroke oil, if not the engine will overheat and cause
damage to your tool.
M. Never ll fuel tank indoors.
KICKBACK
Take care using the metal blade with the tool. Kickback is a reaction that
occurs when the blade hits objects that it can not cut. This can make the
blade push away from the object or run along the object. This reaction can be
intense enough to lose control of the tool and can occur without a warning.
The operator should cut from right to left to minimize the chance of kickback.

10
N. Never ll fuel tank when engine is running or hot.
O. Stop the engine before re-fuelling.
P. Stop the engine and disconnect the spark plug wire If the tool starts
to vibrate abnormally (nd and remove the cause of the vibration
immediately).
Q. Reduce the throttle before turning o󰀨 the engine.
R. The user is responsible for the safety of other people, animals and
objects in the working area. Keep people, children and domestic
animals at a safe distance while the tool is in use.
PREPARATION
BEFORE THE BRUSH CUTTER CAN BE USED IT REQUIRES
SOME ASSEMBLY.
INSTALLING THE GUARD
●With the 5 mm Hex key. Remove the
two screws from the top of the guard
and the one on the side of the cutting
head.
● Place the Bracket (H) on the top of the
shaft and reinsert and tighten the screw
in the cutting head.
● Hold the Guard (D) underneath the
bracket, insert the two screws through
the bracket in to the holes in the guard
and retighten rmly.

11
FITTING THE BLADE
●Lock the shaft by Inserting the 5mm hex
key through the hole and into the blade
mounting boss as shown.
NOTE: The ange nut has a left hand thread.
● Remove the ange nut using the Spark
plug spanner (J) by turning it in a
clockwise direction.
● Remove the top ange and mount the
blade on the centre boss.
● Replace the ange and make sure that
the blade stays correctly mounted.
● Replace the ange nut.
● Tighten the ange nut rmly anti-clockwise.
●Remove the Hex key to unlock the shaft.

12
TO USE THE LINE TRIMMER HEAD
●Lock the shaft by Inserting the 5mm hex
key through the hole and into the blade
mounting boss as shown.
NOTE: The ange nut and spindle have left hand
threads.
● Remove the ange nut using the Spark
plug spanner (J) by turning it in a clockwise
direction.
● Remove the top ange.
●Mount the line trimmer head onto the
spindle.
●Tighten the line trimmer head in
an anti-clockwise direction.
●On the underside of the guard, remove the
protective cover on the line cutting blade.
●Remove the hex key to unlock the shaft.
● Store the top ange and ange nut in a
safe place in case they are needed for
later use.

13
INSTALL THE HANDLES
●Using the 4 mm hex key, loosen the four screws
on the handle bar clamp.
●Pass the right hand handle under the upper
shaft and insert the right handle approximately
30 mm into the clamp.
●Insert the left handle bar into the clamp
approximately 30 mm.
●Gently tighten the clamp screws.
●Adjust the position of the handles to be
comfortable for operation.
●Firmly tighten all the handlebar clamp screws
JOIN THE UPPER AND LOWER SHAFTS
●Line up the button on the lower shaft with the
hole in the shaft clamp and insert the lower
shaft into the clamp until the button clicks into
the hole in the clamp.
●Firmly tighten the knob on the clamp.
NOTE: Whilst inserting the shaft into the joining clamp the lower shaft may
need to be rotated a bit so the internal shaft components can engage correctly.

14
ATTACH THE SHOULDER BELT
The brush cutter must always be used with the shoulder
belt.
●Clip the hook on shoulder strap to the strap
attachment point (5)
WARNING! Always us the brush cutter with the shoulder belt.
FUEL
USE FRESH UNLEADED FUEL (PETROL), 90 OCTANE OR BETTER – Do
NOT use E10 or Ethanol blends. Mix with a premium grade air cooled 2 stroke
oil at a ratio of 40:1
Mix fuel with 2 stroke oil in an approved container. Shake gently and ensure a
thorough mix.
CAUTION! Never use raw fuel without oil in your unit. This will cause
permanent engine damage and void the warranty for that product.
Never use a fuel mixture that has been stored for over 90 days.
CAUTION! The 2 stroke oil must be a premium grade oil for 2-cycle
air cooled engines and must be mixed at a 40:1 ratio with the fuel.
Mixing the fuel at a greater ratio than 40:1 provides insu󰀩cient
lubrication and will cause engine damage and voids your warranty.
Unleaded Plus 2 stroke oil.
Mixed 40:1
40:1
WARNING! Fuel is very ammable. Use extreme care when mixing,
storing or handling fuel or serious personal injury may result.

15
OPERATION
Fuel Cap
WARNING! Always shut o󰀨 engine before fuelling. Never add fuel to a
machine with a running or hot engine.
Do not SMOKE! Failure to heed this warning could result in serious
personal injury.
WARNING! Always ensure there is adequate ventilation when
handling fuel.
FUELING
●Place the brush cutter upright on the ground or on a sturdy bench
and wipe any debris from around the fuel cap.
●Unscrew the fuel tank cap and pour the mixture into the tank using a
funnel (not supplied).
●Be careful not to spill any mixture. If this
happens, wipe the spill with a clean rag.
●Start the engine at least three metres away
from the area where the fuel tank has been
lled up in order to reduce risk of re.
NOTE. It is normal for smoke to be emitted from a new engine during and
after rst use.
RUNNING IN THE ENGINE
A factory-new machine should run at moderate speed for the rst 2-3 hours
of work, as di󰀨erent components need to settle with each other during the
process of running in the engine.
The engine can reach its maximum power after this running in period.
After the rst 2-3 hours of works, stop and make sure that all nuts and screws
are securely fastened, and tighten them if necessary.

16
WARNING! If the brush cutter vibrates
excessively. STOP the engine immediately and
investigate the cause.
STARTING THE BRUSH CUTTER
Primer Bulb
●Press the primer bulb located at the
bottom of the air lter until the primmer
bulb lls with the fuel mixture.
●Move the choke lever to the start
position.
● Set the ON/OFF switch (14) to the ON
position.
●Briskly pull the starter until the engine
splutters.(This may take up to 10 pulls).
●Immediately move the choke lever to the
run position.
●Pull the starter again until the engine
starts.
●Grasp the right handle with your right
hand to depress the throttle interlock (15)
and squeeze the throttle lever (16) to
increase the speed of the engine.
Choke lever
ON
OFF
Pull
Start
Run
Throttle
Interlock
Throttle
Lever

17
TO STOP THE ENGINE.
●Move the ON/ OFF switch to the OFF Position.
ON
OFF
USING THE BRUSH CUTTER WITH THE BLADE.
●Hold the brush cutter with the right hand on the throttle lever and the
left hand on the left handle.
● Keep a rm grip with both hands while in operation. Brush cutter
should be held at a comfortable position with the right handle about
hip height.
●Maintain your grip and balance on both feet. Position yourself so that
you will not be drawn o󰀨 balance by the kick-back reaction of the
cutting blade.
●Adjust the shoulder strap to position the brush cutter at a
comfortable operating position and to assure that the shoulder strap
will reduce the risk of operator contact with the blade.
WARNING! Always position the brush cutter on the operator’s right
hand side when using.
WARNING! The operator must keep at least 15 metres away from
bystanders when using the brush cutter.
WARNING! Read and understand all of the safety warning in this
manual before operating the brush cutter.
WARNING! Beware of kickback.
●When the throttle lever is depressed
approximately 50% the throttle
lock button (13) can be pressed if
required. This will hold the throttle at
this point.
●To disengage the throttle lock
squeeze the throttle lever fully and
release.
Throttle Lock

18
USING THE TOOL AS A LINE TRIMMER.
●Keep the trimmer tilted toward the area being cut. This is the best
cutting area.
●Cut from right to left and from the top down. This reduces the
amount of debris thrown at the operator and reduces the risk of the
entanglement.
NOTE. If grass becomes wrapped around the spool, stop the engine, and
remove the grass.
FEEDING THE LINE
The line trimmer has a bump feed mechanism which releases the line without
having to stop the engine.
●To release additional line, lightly tap the line trimmer spool on the
ground while operating the unit at high speed. Never bump the spool
head on concrete as it may crack the spool housing.
NOTE. Always keep the line fully extended. Line release becomes more
di󰀩cult as the cutting line becomes shorter. Each time the line trimmer spool is
bumped it releases approximately 2cm of line. Release the line until it strikes
the line cutting blade. This may require several taps.
●Inspect and clear the area of any hidden objects such as glass,
stones, concrete, fencing, wire, wood, metal, etc.
●Never use blades near footpaths, fencing, posts, buildings or other
immovable objects.
The brush cutter should be used like a scythe, cutting from the right
to the left in a broad sweeping action.
●The blade is suited only for weeds and vines. When the blade
becomes dull, it can be turned over to extend the life of the blade.
Do not sharpen the blade.

19
BEFORE EACH USE
●Remove dirt and debris from the tool exterior.
●Check all screws for tightness and tighten if necessary.
● Check blade ange nut is tight and tighten if necessary
●Check the blade for damage. Replace if damaged or cracked.
●Inspect the engine, tank and hoses for possible fuel leaks, and repair
as necessary.
● Inspect the engine cooling ns for accumulations of dirt or debris,
and clean as necessary.
EVERY 10~15 HOURS OF USE
● Loosen and remove the air lter cover and lter element.
● Inspect the element. If the lter element is distorted or damaged,
replace it with a new one.
● Wash the lter element in clean fuel, and squeeze or blow dry.
● Reinstall the lter element and air lter cover to the tool.
●Use the spark plug wrench to remove the spark plug (turn anti-
clockwise to remove).
●Clean and adjust the spark plug gap to 0.6-0.7 mm. Replace any
damaged or visibly worn plug with a RCJ6Y spark plug or equivalent.
● Reinstall the spark plug by hand, then tighten it rmly with the spark
plug wrench.
EVERY 50 HOURS OF USE
●INSPECTION Inspect the entire tool and tubes for damage including
loose or missing components and repair as necessary.
●SPARK PLUG Replace the spark plug with a RCJ6Y spark plug or
equivalent.
Gapped to (0.6-0.7) mm.
● FUEL FILTER Use a wire hook to extract the fuel lter from inside
the fuel tank, and then remove and wash the lter element in clean
fuel. Before reinstalling the lter, inspect the condition of the fuel line.
If damage or deterioration is noted, the tool should be removed from
service until it can be inspected by a trained service technician.
MAINTENANCE

20
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE REMEDY
Engine fails to start. No fuel in tank. Fill fuel tank.
Fuel system not primed. Press primer bulb 3-5 times
until fuel system is full of fuel.
Choke not engaged. Use choke when starting.
Spark plug is fouled. Replace spark plug.
No Spark. Turn ignition switch to ON
position.
Engine is ooded.
Remove the spark plug and
leave for 1 hr. Replace the
spark plug and try again.
Engine hard to start. Water in fuel or stale fuel. Drain fuel and replace with
fresh fuel.
Spark plug. Service spark plug.
Engine lacks power. Air lter clogged. Clean the air lter.
Engine run hot. Incorrect fuel mixture. Replace fuel with correct mix
40:1.