LAWN STAR LSPS 5850 Operating Instructions Manual

PROFESSIONAL

PETROL CHAIN SAW

OPERATING INSTRUCTIONS

MODEL: LSPS 5850

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Thank you for purchasing the Lawn Star Petrol Chain Saw which is one of the finest and
most advanced chain saws 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.

IMPORTANT INSTRUCTIONS FOR YOUR PERSONAL SAFETY

Before using the chain saw, read the operating instructions and act accordingly.
ATTENTION: You run the risk of injury if you use the chain saw incorrectly. It is
imperative that you read these Operating Instructions and follow the instructions given.

A) General safety instructions

 Do not allow children less than 18 years of age, nor anyone who is not familiar with

these instructions to use the petrol chain saw.

 The chain saw should be used by trained and experienced persons only.
 Keep the operating instructions for future reference.
 Do not operate this equipment when tired, ill, or under the influence of alcohol, drugs

or medication.

 Only operate the chain saw if physically fit and alert.
 Obey all safety instructions and warnings.

B) Instructions on the proper use of personal protective clothing

Working with a chain saw requires special measures with regard to protective
equipment and clothing suitable for protecting your head, hands, feet, legs, eyes and
ears.

 Keep body parts away from the chain.
 Wear close fitting clothing which cannot get caught in moving parts.
 Always wear an approved safety helmet when felling trees and removing branches.
 Always wear safety goggles and/or a face guard.
 Always wear suitable heavy-duty protective gloves.
 Wear ear protection to avoid damage to your hearing.
 Wear safety clothing including sturdy, non-slip footwear.
 Wear leg guards.

C) Instructions on the safe use of the chain saw

ATTENTION: Read the operating instructions carefully and familiarise yourself in the

correct use of the chain saw before using it for the first time.

 Before storage allow the engine to cool. When not in use, store the chain saw in a

dry and locked place, out of reach of children.

 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.

 Repairs may only be performed by authorised service agents.
 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 over-reach. Ensure good footing and balance
are maintained.

 Inspect your petrol chain saw before each operation. Pay special attention to the

chain-bar and chain. If any part is damaged or worn, repair or replace before
operation.

 Always hold the chain saw firmly with both hands while working with it.
 No other person may be within the working range of the chain saw.

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 When not in use put the chain saw down in such a manner that there is no risk of

injury.

 Switch the device off, wait for the chain to come to a complete standstill and

disconnect the spark plug before setting, servicing, cleaning, transportation or
storage.

 Always use the chain cover when transporting the chain saw.
 Hold the chain saw firmly when starting. The chain and bar must be free.
 Before starting work ensure that you are standing firmly.
 Never cut with the tip of the bar – the chain saw may recoil (“kick-back”)
 Do not use the chain saw near combustible gases or dust – danger of explosion.
 Always ensure all handles and guards are fitted when using the chain saw. Ensure all

screws and nuts are properly tightened before use.

 Only operate this chain saw once correctly and fully assembled.
 Switch the chain saw off immediately if you notice any changes in the machine.
 Always have a first-aid kit at hand in case of accidents.
 If the chain comes into contact with soil, stones, nails or other foreign objects, stop

the chain saw immediately and check the chain as well as the bar.

 Never leave the chain saw unsupervised.
 Ensure that no chain oil penetrates into the soil or sewage. Always place the chain

saw on something that will absorb any oil dripping from the bar or chain.

 Stop the engine and disconnect the spark plug if the chain saw becomes blocked.
 Never remove any of its components and never use a damaged or incomplete

machine. Never modify any of the machine components.

 Do not use your petrol chain saw for any jobs other than those for which it was

intended.

 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. Refuel in a well ventilated area and never in closed
environments. Start the engine away from the place where it was refuelled. Ensure
the tank cap is tightened properly. Return the chain saw 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.

 If the chain becomes jammed or blocked by obstacles, switch the engine off

immediately and visually inspect the chain saw for damage. Note, if the chain saw is
damaged, repairs and servicing must only be performed by authorised dealers and
service agents.

D) Warning: Danger of recoil (“kickback”)

WARNING: While the engine is running, kickback may occur when the nose or tip of

the guide bar touches an object, or when the wood closes in and pinches the saw
chain in the cut. Top contact in some cases may cause a lightning fast reverse
reaction, kicking the guide bar up and back towards the operator. Pinching the saw
chain along the top of the guide bar may push the guide bar rapidly back towards the
operator. Either of these reactions may cause the operator to lose control of the saw
which could result in the chain saw being flung upwards at high speed towards the
person holding the chain saw and causing serious personal injury.

Do not rely exclusively on the safety devices built into your saw. As a chain saw user
you should take several steps to keep cutting jobs free from accident or injury:

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 With a basic understanding of kickback you can reduce or eliminate the element of

surprise. Sudden surprise contributes to accidents.

 Keep a good grip on the saw with both hands, the right hand on the rear handle, and

the left hand on the front handle, when the engine is running. Use a firm grip with
thumbs and fingers encircling the chain saw handles. A firm grip will help you reduce
kickback and maintain control of the saw.

 Make certain that the area in which you are cutting is free from obstructions. Do not

let the nose of the guide bar contact a log, branch, or any other obstruction which
could be hit while you are operating the saw.

 Do not overreach or cut above shoulder height.
 Follow manufacturers sharpening and maintenance instructions for saw chain.
 Only use replacement bars and chains specified by the manufacturer or the

equivalent.

 If possible, use a log stand for cutting loose logs.
 Always keep aware of the bar tip relative to other objects.
 Cut at high engine speeds. Never start the machine while the chain rests on an

object.

 Piercing cuts with the bar tip may only be performed by trained and experienced

operators.

E) Instructions on safe working techniques

 Always maintain a normal body posture when operating the device. Always keep your

balance.

 Do not work with your body bent forwards.
 Do not work on ladders, scaffolding, walls or trees.
 Do not use the chain saw above shoulder height.
 Do not cut plastic or other material. This chain saw is only intended for cutting wood.
 Ensure that the wood cannot twist while it is being cut.
 Never climb in a tree to cut branches.
 Watch out for splintering wood. While you are sawing you may be injured by flying

wood chips.

 Do not use the chain saw to lever or move the wood.
 Only cut with the lower section of the saw. The saw will be repulsed towards you if

you try and cut with the upper section of the saw.

 Ensure that the wood is free from of stones, nails and other foreign objects.
 First-time users must obtain practical training in the correct use of the chain saw and

the required safety equipment from an experienced operator.

 Keep the running chain saw from touching the ground or wire fences. Do not cut thin

wood or timber that is already sawn into small pieces.

 Do not use the chainsaw as a lever for lifting or moving objects.
 DO NOT fasten tools or accessories to the chainsaw that are not specified by the

chainsaw manufacturer.

ATTENTION: SAFETY FEATURES
Safety features are designed to protect you against injuries and must not be altered or
circumvented.

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Warning Symbols

Read operating instructions
before operating this machine

Warning: Kick-back

Wear heavy-duty safety
gloves

Wear head, eye and ear
protection

Keep bystanders away from
chain saw when it is in use

Do not use in rain

Hold the chain saw with
both hands when operating.

Avoid running the engine indoors.
The exhaust gases contain
harmful carbon monoxide.

The following symbols appear on the chain saw. For safe operation and
maintenance, please know what the symbols mean:

Fuel tank cap
Chain oil tank cap

On/Off switch

Choke

Indication regarding the chain oil adjuster nut:

 “MIN” direction-the oil flow decrease
 “MAX” direction-the oil flow increase

Carburettor adjustment symbols:

The position of H-needle
The position of L-needle
The position of idle adjustment screw

Chain Brake Symbol:

Arrows show which direction to engage or disengage chain
brake. Push the guard all the way forward to engage, and
pull back to disengage.

STOP

PULL

CHAIN OIL

MIN

MAX

H

L

T

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ASSEMBLY OF CHAIN SAW

CAUTION: The saw chain has very sharp edges. Always use safety gloves when assembling
the chain.

Your chain saw package contains the following items as illustrated in figure 1.

Assemble the guide bar and the saw chain on the power unit as follows:

1. Ensure the spark plug wire is disconnected and keep it away from spark plug.

2. Place the chain saw on a stable surface.

3. Pull the guard towards the front handle to check that the chain brake is not on (Fig.2).

4. Loosen the nuts (Fig.3a) and remove the chain cover (Fig.3b).

5. Install the included claw to the power unit (Fig.4) if it is not pre-fitted.

6. Gear the chain to the sprocket (Fig.5) and, while fitting the saw chain around the guide bar,
mount the guide bar to the power unit (Fig.6). NOTE: Pay attention to the correct direction of
the saw chain. The cutting teeth on the upper side of the bar must point in the forward
direction (Fig.7)

7. Adjust the position of chain tensioner screw on the chain cover to the lower hole of guide
bar (Fig.3b) If necessary, adjust the tensioner screw until the tensioner bolt is seated in the
lower hole in the bar.

8. Fit the chain cover to the power unit and fasten the nuts (Fig.3a) to finger tightness.

9. Check that all chain links are seated correctly in the bar’s groove and that the chain is fitted
around the driving sprocket correctly.

10. While holding up the chain bar, adjust the chain tension by turning the tensioner screw until
the chain links just touch the bottom side of the bar rail (Fig.8). The chain should be
tensioned such that it can be lifted about 3 mm in the middle of the bar (Fig.8).

11. Tighten the chain cover nuts securely (12-15N.m). Check the chain for smooth rotation and
proper tension while moving it by hand.

12. If necessary, readjust the tension of the chain by first loosening the chain cover nuts slightly,
then again adjusting the chain tension by turning the tensioner screw. Securely retighten the
chain cover nuts.

NOTE:
A new chain will expand its length in the beginning of use. Check and readjust the tension
frequently as a loose chain can easily derail or cause rapid wear of itself and the guide bar.
The chain tension has a significant effect on the life of the chain saw, and must therefore be
checked regularly. When the chain warms up to operating temperature it will expand a little and
might need to be re-tensioned.

1 2 3

4 6 7

1. Engine

2. Bar protector

3. Chain bar

4. Saw chain

5. Chain file

6. Universal tool

7. Screwdriver for carburettor
adjustment

Figure 1

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Sprocket

1. Loosen

2. Tighten

Figure 8

Figure 5

Figure 6

Figure 7

Figure 3b

Tensioner
bolt

Lower
hole

Chain
cover

Figure 4

claw

Chain
catch
bolt

Chain
brake OFF

(operating
position)

Chain
brake ON
Guard

Figure 2

Oiling
port

Figure 9

Bar
groove

Oiling
port

Sprocket

Grease
port

Nuts

Chain
cover

Figure 3a

Tensioner screw

1

2

3 mm

clearance