PETROL
BRUSHCUTTER
OPERATING
INSTRUCTIONS
MODELS :
LSB 3320
LSB 4320
LSB 5243
Thank you for purchasing the Lawn Star Pro-Series petrol Brushcutter / Trimmer which is one of the
finest and most advanced products today’s technology can produce. Before you begin using it, please
read this manual carefully and familiarise yourself with the control and the proper use of this product
to ensure you get the best possible performance from it.
SAFETY PRECAUTIONS
Inspect your brushcutter / trimmer and all its parts before each operation. If any part is damaged or
worn, repair or replace before operation. Use only genuine Lawn Star (Pty) Ltd. replacement parts
when servicing or repairing the unit. These parts are available from your supplying dealer or service
agent. Have the brush cutter / trimmer repaired only by an authorised repairer. Use only genuine Lawn
Star replacement nylon cutting line 2.40 mm (Part No. 80-24000), never metal. Use only genuine
Lawn Star replacement blade discs and never fit blades larger than 260 mm diameter.
WARNING: Petrol and its vapours are highly flammable. Always stop the engine before refuelling.
Do not smoke or light any flames while refuelling. Wipe off any fuel that may have spilled. Start the
engine away from the place where it was refuelled. Ensure the tank cap is tightened properly. Return
the brushcutter / trimmer to its normal operating position before starting.
CAUTION: Exhaust fumes are toxic and asphyxiating. Inhalation may be lethal. Do not start the
engine in closed or poorly ventilated environments.
It is essential that the operator wears safety goggles, face shield, gloves, ear muffs, shoulder
harness, protective clothing and sturdy, non-slip footwear with toe-protector.
Do not use your brushcutter / trimmer for any jobs other than to cut brush, grass and weeds. Do not use
unless adequately guarded. Do not force your brushcutter / trimmer. If the engine labours, pull away
from brush / grass.
Do not operate brushcutter / trimmer without a line-trimming blade as over-extended line is dangerous
and will damage engine and invalidate warranty.
Use care in picking up or holding the unit. Always hold the brush cutter / trimmer with both hands. Do
not grasp the line-trimming blade located at the edge of the underneath side of safety guard.
Inspect the area to be cut and remove all debris that could be entangled in the cutting head. Also
remove any object that the unit may sling during cutting.
Avoid dangerous environments. Do not use the unit in poor light or in damp or wet locations. Do not
use in the rain. Do not use on steep slopes, especially if damp. Work across slope faces, not up and
down. Do not over-reach. Ensure good footing and balance is maintained.
Do not operate brushcutter / trimmer when tired, ill, or under the influence of alcohol, drugs or
medication.
Keep hands and feet clear of the rotating cutting head / blade while unit is in use. Cutting elements
continue to rotate for a few seconds after switch-off.
Do not allow children under 16, nor anyone who is not familiar with these instructions to use the
brushcutter / trimmer. Children, pets and onlookers should be kept at least 15 meters away from the
work area, unless shielded by an effective solid barrier.
Before storage allow the engine to cool. Store the unit indoors in a dry, ventilated and locked place, out
of reach of children.
PREPARATIONS FOR USE
Insert “Bull Horn Handles” into the bracket provided (Fig.1). Align the handles and tighten the 4 alum
bolts to lock handles into position. Fit the safety guard (Fig.23b) by tightening the 4 securing screws
provided with the guard. Fit tap-to feed cutting head or disc see section on fitting and changing cutting
heads
FUELLING
This product is equipped with a 2-stroke engine which requires 2-stroke lubricating oil to be pre-mixed
with petrol. Use only genuine Lawn Star 2-stroke engine oil (Part No. 90-20000) and use lead-free
petrol (Octane 95). Mix both thoroughly (as per fuel-mix ratio) in a separate container. Always prepare
the fuel-mixture and refuel the brushcutter / trimmer outside in a well ventilated environment (Fig.2).
Do not smoke! Do not use marine or automotive 2-stroke oil.
Fuel-mix ratio for normal 2-stroke engine oil - 1:25 (4%) e.g. 40 ml of oil per 1 litre of petrol
Always stop the engine before refuelling. Do not smoke or light any flames while refuelling. Wipe off
any fuel that may have spilled. Start the engine away from the place where it was refuelled. Ensure the
tank cap is tightened properly. Return brushcutter / trimmer to its normal operating position before
starting.
Fig 1
STARTING COLD ENGINE AND STOPPING
1. Switch the ON/OFF switch (Fig 3) to the “ON” position.
2. Lift the choke lever located to the right of the carburettor cover (Fig.4) and place it in the (H) Start
position.
3. Repeatedly press the primer bulb (Fig.5) 5-10 times until the fuel is pumped back to the tank
through the second transparent pipe (Fig.6).
4. Grip the throttle control handle by pressing the trigger lock-off lever (Fig.7-No1) with the palm of
the hand, then fully depress the throttle trigger (Fig.7–No2) with your fingers and simultaneously
push in the throttle lock-on button (Fig.7-No3) with your other hand.
5. While holding the throttle lock-on button down, release the throttle trigger. This wills lock-on the
throttle trigger so that both hands are free to start the engine.
6. Pull the starter cord 5 times fully, engine may start (Fig.8).
7. Set the carburettor lever to run (lll) (Fig.9)
8. Pull the starter cord (Fig.8) repeatedly until the engine starts and allow to run for a few seconds.
9. Depress the throttle trigger (Fig.7-No2) and the throttle lock-off button will release automatically.
The engine will idle and the clutch will disengage causing the cutting head to remain stationary.
10. To stop the engine switch the ON/OFF switch to the “OFF” position (Fig.10)
STARTING WARM ENGINE
Proceed as with cold engine start but with the choke lever in the run position lll (Fig.9)
OPERATING INSTRUCTIONS
When properly assembled with safety-guard, safety harness and cutting-head / blade, your unit will cut
unsightly weeds, brush and tall grass in those hard-to-reach areas along fences, walls, foundations and
around trees.
NOTE: Even with care, trimming around foundations, brick or stone walls, kerbs etc. will result in
above normal line wear. Avoid contact when using the steel cutting blade disc.
TRIMMING
For normal trimming, the trimmer cutting-head should be inclined at about 30 degrees to the lawn,
while cutting towards the left in a sweeping motion. Always cut away from the operator. Do not pull
trimmer in towards operator.
FENCE / FOUNDATION TRIMMING WITH LINE CUTTING-HEAD ONLY
Approach trimming around chain link fences, picket fences, rock walls and foundations slowly to cut
close without whipping line against the barrier. If the line comes into contact with rock, brick walls, or
foundations, it may fray as it wears. If line snags fencing, it may snap off.
TRIMMING AROUND TREES
Trim around tree trunks with a slow approach so line or blade disc does not contact bark. Walk around
the tree trimming from the right to the left. Approach grass or weeds with the tip of the line / edge of
blade disc and tilt cutting-head forward.
CUTTING-HEAD LINE FEED
As the cutting line wears and shortens the cutting performance is reduced. In order to maintain
optimum performance ensure that the cutting lines are fully extended. To extend additional line, tap the
centre of the cutting head lightly on the ground WHILE THE UNIT IS RUNNUNG AT MAX RPM.
The line will automatically lengthen. Excess line will be clipped off by the blade on the safety guard.
Note: Cutting line wears more rapidly if trimming against hard surfaces such as bricks, concrete or
asphalt. Extend line regularly to ensure optimum performance at all times.
CARE, MAINTAINANCE, STORAGE AND TRANSPORT
Spark plug: Check every 12 hours or if starting problems are experienced. When the engine is cold,
remove the plug cap and unscrew the spark plug with a suitable spark plug socket (Fig.11). If the
electrodes are excessively soiled or worn then replace with an equivalent new spark plug (e.g. NHSP
LD L8RTF).
Excessive soiling may be due to a) too high ratio/poor quality 2-stroke oil or b) clogged air filter.
Replace spark plug and screw in by hand to avoid stripping of thread, then tighten with socket.
Air filter: Clean air filter regularly. Unscrew cover (Fig.12) and remove foam filter (Fig.13). Wash
filter with soap and water and allow drying before replacing. Fit new filter if damaged.
Fuel intake filter: Replace every 12 months. Remove with hook through tank refilling inlet.
Transport and storage: If brushcutter is unused for more than 2 months or being transported, then
empty the fuel tank. Before storage allow the engine to cool. Store the unit indoors in a dry, ventilated
and locked place, out of reach of children.
CAUTION
Allow engine to reach maximum RPM before cutting brush or trimming grass.
For the most effective cutting, cut approximately 25 mm into the brush / grass, allowing the tip of the
line (teeth on the bade disc) to cut. Do not force the brushcutter / trimmer into the work.
Periodically remove weed wrap from beneath the cutting-head / blade to prevent overheating the
engine. Weed wrap occurs when strands of weeds become entangled around the shaft beneath the
cutting-head / blade. Remove weed wrap, with a screwdriver or similar device and ensure cutting-head
/ blade rotates freely.
RENEWING THE CUTTING LINE
Hold the cutting-head with one hand and unclip the cap with the other hand by pressing in the tabs on
either side of the cutting head and simultaneously lifting the cap (Fig.15). Take out the spool ( Fig.16).
Remove any old bits of line. The new nylon line should not exceed 6,0 metres in length. (Use only
genuine Lawn Star 2.40 mm replacement line). Uncoil the new line completely. Double over in the
middle so that you have two equal lengths. Insert the doubled-over loop into the slot provided in the
spool divider and push to the bottom (Fig.17). Wind the two lengths onto the spool (one length on each
side of the spool divider) in the direction shown on the spool flange. When each of the spool
compartments is full, the centre divider rim should still be visible. Ensure the line is wound neatly and
tightly. This is important. Clip the ends of the line into the holding slots provided, leaving enough free
length to facilitate threading through the eyelets ( Fig.18). Pass the line ends through the eyelets in the
spool housing and replace spool into housing (Fig.19). Make sure the spring is still in place inside the
spool housing. Replace the cap ensuring that it is firmly clipped in place ( Fig.20 ). Pull on the line
ends to release the spool from the “locked” position to the operating position. Trim off excess
trimming line that extends beyond the line-trimming blade before starting engine. ENSURE CAP IS
PROPERLY LOCKED IN PLACE BEFORE STARTING ENGINE.
FITTING AND CHANGING THE CUTTING HEADS.
Ensure unit is switched off and remove spark plug cap before carrying out changes.
Your brush cutter /trimmer are supplied with both a tap-to-feed cutting head and a blade disc. To
attach the tap-to-feed cutting head remove the nut if fitted by turning it in a clock-wise direction with
the spanner provided. Ensure both spacer and dust cover (Fig.22a-No1 and No3) are fitted. Attach tapto-feed cutting head by rotating it in an anti-clock-wise direction (Fig.22a-No2).
To attach the cutting disc assemble as per Fig.21ensuring spacers are in the correct positions,
tightening the nut in an anti-clock-wise direction (Fig.22 -No2).
To attach the fixed-line cutting head (LSB 5243 only) assemble as per figure 22b and tightening the
nut anti-clock-wise (Fig.22b-No2).
To remove the blade disc, fixed line and tap-to-feed cutting head insert the 4mm allen key provided
into the hole (Fig 21a-No1) and rotate until it locks in place. Use the socket to unscrew nut or by hand
rotate the tap-to feed cutting head in the clock-wise direction.
Remove the skirt from the safety guard when the tri-blade, cutting disc and fixed line cutting head are
fitted (Fig.23a). This is done by removing the screw (Fig.23a-No1) at the back of the guard and
unclipping the skirt. This skirt must be re-fitted when the tap-to-feed cutting head is used to ensure that
nylon cutting line length is maintained by the blade fitted to this skirt (Fig.23b).
MODELS: LSB 3320, LSB 4320, LSB 5243
2
3
Use 2 ines only
Fig. 22a TAP-TO-FEED
CUTTING HEAD ASSEMBLY
MODELS: LSB 3320, LSB4320 AND
LSB5243
Fig. 22b FIXED-LINE
CUTTING HEAD ASSEMBLY
MODEL: LSB5243
160mm
1
Remove bottom skirt of guard when
the disc or tri-blade is fitted. This is
done by removing the screw at the
back of the guard and unclipping the
skirt.
Fig 23a
GUARD WITHOUT SKIRT USED
WITH CUTTING DISC AND TRIBLADE.
When the nylon tap-to-feed head is
fitted the skirt must be fitted to ensure
the correct cutting line length is
Fig 23b
maintained.
GUARD WITH SKIRT FITTED USED WITH
TAP-TO-FEED CUTTING HEAD.
TROUBLE SHOOTING GUIDE
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
Engine won’t start
No spark
Check spark by removing spark plug
and re-attaching cap and pulling
starter cord. If no spark replace with
new spark plug.
No fuel
Pump primer bulb, if no fuel flows
then pipes blocked. Have serviced
If primer bulb fills then engine may
be flooded
Flooded engine
Remove spark plug, turn engine
upside down, set choke to run, pull
starter cord 10 times, clean spark plug
and refit.
Carb needs tuning
Have serviced
Blocked exhaust spark arrestor
Remove spark arrestor, clean & refit
Check fuel/oil mix
Use fresh and correct fuel mix
Dirty air filter
Clean per instruction
Line is tangled inside cuttinghead or trapped under tabs on
Spool
Remove spool from unit, untangle
line and wind correctly in direction
of arrow on spool
Upon removing spool, line
appears to be melted together
Trim off damaged line and
rewind spool
Line wound in the wrong
direction
Rewind line ensuring that both
lines are wound in the same
direction as the arrow on the spool
Insufficient line on spool
Remove spool and fit new line
Internal damage to cutting-head
Disassemble cutting-head and
examine parts for damage. Replace
parts or entire cutting-head
Improper trimming procedures or
poor quality line
See general operating instructions
or replace line
Metal eyelet damaged
Replace spool housing
Weed wrap
Remove weed wrap between
cutting-head / blade and motor
Brush cutter / trimmer being
Forced into brush / grass
Pull away from cutting area, see
operating instructions in manual
Engine will not rev
Engine will not rev
and emits smoke
Line won’t feed
Line snaps off
or frays
Engine slows down
while cutting
LAWN STAR ( PTY ) LTD.
WARRANTY CARD
LSB 3320, LSB 4320 & LSB 5243
Please read carefully
This card is required for warranty repair claims. Please fill in this card and keep it in a safe place,
stapled to the original proof of purchase. The original proof of purchase (ie. receipt, invoice, docket,
etc.) must show the original date of purchase and clearly identify the product.
WITHOUT THIS CARD AND ORIGINAL PROOF OF PURCHASE, ANY WARRANTY
BECOMES NULL AND VOID.
Make:……………………..Serial No:………..……………….Date of Purchase:………………….
Model:………………………………
PURCHASER
NAME:
ADDRESS:
PHONE :
PURCHASED FROM
NAME :
ADDRESS:
PHONE:
LIMITED DOMESTIC USE WARRANTY
Lawn Star (Pty) Ltd. guarantees this unit to be free from defects in material and workmanship. If any
such defect should become apparent during a period of
12 MONTHS
from the date of the original purchase, we undertake to repair this unit free of charge or replace this
unit with a factory reconditioned unit at our discretion. This does not prejudice your rights in terms of
the Consumer Protection Act.
Transport costs to our service centre and back to the owner, should such costs occur, will be carried by
the owner of the unit.
The repaired or replaced unit will be covered by this warranty for the remainder of the original
warranty period.
This warranty covers only the original purchaser of this unit.
This warranty becomes invalid if :
- the unit has been used commercially or for rental purposes
- damage has been caused by misuse, abuse, accident or normal wear and tear;
- spares and accessories other than specified by us are used with this unit;
- the unit has been opened, altered or otherwise tampered with;
- the unit has been used without safety-guard and line-trimming blade in place.
- the engine has been run without 2-stroke engine oil pre-mixed as per instruction
- marine or automotive 2-stroke oil is used
Line trimming blade, cutting head, cutting blade disc and line are wearing parts and are not
covered by Warranty.
PLEASE READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE YOU OPERATE
THIS UNIT.
LAWN STAR ( PTY ) LTD.
For service and warranty repairs please contact your nearest Service
Agent listed below:
CUSTOMER CARE : 0860-LAWNSTAR
HEAD OFFICE :
98 Bofors Circle, Epping 2 South, Cape Town
PO Box 496, Parow, 7499
Tel: 021-535-5249
Fax: 021-535-4624
EASTERN CAPE: Tel: 041-365-6600
Fax: 041-365-6661
FREE STATE
: Tel: 082-556-6325
Fax: 086-691-6297
GAUTENG
: Tel: 011-979-0162
Fax: 011-979-0174
KZN
: Tel: 031-579-4390
Fax: 031-579-4400
WEST COAST
: 082-826-0316
NORTHERN CAPE: 082-826-0316
OVERBERG
: 084-609-7341
NAMIBIA
: Tel: 061- 232-475
BOTSWANA
: +267-318-6851
ZIMBABWE
:
Fax: 061- 242-139
+263-4-486 192/646
For more information visit: www.lawnstar.co.za
Download PDF
Similar pages