Mitox 455CSX, 515CSX Operator's Manual
www.mitox.co.uk
Operator’s Manual
user manual, maintenance instructions and spare parts
455CSX / 515CSX PREMIUM Chainsaw
Read this manual carefully before operating the machine
Original Instructions Version July 18. E&OE
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
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Component Location
1. Saw chain
2. Guide bar
3. Chain brake
4. Front handle
5. Air filter cover
6. Lock Lever
7. Engine Switch
8. Throttle lock lever
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9. Rear Handle
10. Throttle Trigger
11. Fuel Level Window
12. Fuel Tank Cap
13. Choke Lever
14. Starter Handle
15. Chain Oil Tank Cap
16. Guide Bar Cover
17. Fuel Primer Bulb
18. Integrated Tool
19. Decompression Valve*
20. Clutch Cover
21. Chain Tensioner
22. Felling Claws
(*not on 455 or 515CSX)
Original Instructions Version July 18
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
PRODUCT DESCRIPTION
This Chainsaw is a 2 stroke fast running power tool and is designed to be used in a domestic ap-
plication for cutting wood only. Do not cut metal, plastic or any non-wood materials.
Warnings in the Manual
This mark indicates instructions which must be followed in order to prevent accidents which could
lead to serious bodily injury or death.
This mark indicates instructions which must be followed or it leads to mechanical failure, breakdown,
or damage.
This mark indicates hints or useful directions in the use of the product.
Safety Symbols
Warning: Danger, Caution
Read the documentation and safety instructions which are
provided in this user manual
When operating this machine, use protective equipment such
as goggles, helmet and ear defenders
Use the Chainsaw with two hands
Beware: Keep hands and feet away from moving parts.
Always keep a safe distance from the cutting parts
Beware of objects being thrown from the operating zone
Warning! Danger of Kickback
Original Instructions Version July 18
455CSX/515CSX_030718
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455CSX / 515CSX PREMIUM Chainsaw
Directive 2000-14/CE. Guaranteed noise levels
Danger: Risk of intoxication
Danger: Risk of fire or explosion
Hot surface, risk of burn
Taking Care of Warning Labels
Always keep warning labels clean and free of scratches, which might make them illegible or
dicult to read. If the warning labels provided with your Chainsaw become damaged, peel
o, or otherwise become illegible or dicult to read, order new labels from the authorised
servicing dealer and replace the damaged labels. When applying new labels, first wipe away any
dirt and dry the surface before applying the new label in the same place as the original label.
Explanation of Symbols on the Machine
For safe operation and maintenance, symbols are carved in relief on the machine.
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FUEL TANK
2 stroke mix
Position: Fuel cap
CHAIN OIL TANK
Position: oil cap
STOP SWITCH
Setting the switch to the “O” position, the engine stops immediately.
Position: Rear-left of the unit
Original Instructions Version July 18
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
CHOKE OPERATION
<RUN>
Starting mode when the engine is hot.
Position: Upper-left of the air cleaner cover
<START>
Starting mode when the engine is cold.
Position: Upper-left of the air cleaner cover
HIGH-SPEED ADJUSTMENT SCREW
H
Position: Left side, screw under “H” stamp
L
T
SLOW-SPEED ADJUSTMENT SCREW
Position: Left side, screw under “L” stamp
IDLE ADJUSTMENT SCREW
Position: Left side, screw under “T” stamp
CHAIN BREAK RELEASE / ACTIVATION
Released (white arrow) and Activated (black arrow).
Position: Front of the chain cover
Safety Precautions
Read this Owner/Operator Manual carefully. Be sure you understand how to operate this
Chainsaw properly before you use it. Failure to do so could result in serious injury.
Keep this manual handy so that you may refer to it later whenever any questions arise. Also note
that you are able to contact your authorised MITOX® dealer for assistance.
Always include this manual when selling, lending, or otherwise transferring the ownership of this
product.
This product has been designed to be used as a Chainsaw power tool as described previously and
it should never be used for any other purpose; doing so could result in unforeseen accidents and
injuries occurring. Only approved MITOX® accessories should be used with this product.
Original Instructions Version July 18
455CSX/515CSX_030718
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455CSX / 515CSX PREMIUM Chainsaw
This Chainsaw is equipped with an extremely sharp blade, always wear sturdy gloves when
handling the blades and fit the safety guards when not in use.
When using this Chainsaw for the first time, take it to a wide, clear, open space, start the engine,
and practice handling the Chainsaw until you are sure that you will be able to handle it properly in
actual operation.
You should never use this Chainsaw when under the influence of alcohol, suering from
exhaustion or lack of sleep, suering from drowsiness as a result of having taken medicine, or at
any other time when your judgement might be impaired or that you might not be able to operate
the Chainsaw properly and in a safe manner.
Never allow children or anyone unable to fully understand the directions given in this manual to
use this Chainsaw.
When planning your work schedule, allow plenty of time to perform the work and allow plenty
of time for rest. Limit the amount of time you continuously use this product to 30-40 minutes per
session and take 10-20 minutes of rest between work sessions. Also, try to keep the total amount
of work performed in a single day to 2 hours.
Never run the engine indoors as the exhaust gases contain harmful carbon monoxide.
Never use this Chainsaw in the conditions described below:
When the ground is slippery or when other conditions exist which might make it dicult to
maintain a steady posture while using this product.
At night, at times of heavy fog, or at any other time when your field of vision is limited and it
would be dicult to gain a clear view of the area where it is to be used. In heavy rain, during
lightning storms, at times of strong or gale-force winds or at any other time when the weather
conditions might make it unsafe to use this product.
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Original Instructions Version July 18
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
Work Clothing & Safety Equipment
When using this product, you should wear the correct Personal Protective Equipment.
• Helmet
• Safety goggles / face protector
• Ear protection
• Thick work gloves
• Non-slip, steel toe capped work boots
• Strong, durable work clothing; shirts should be long sleeved and trousers should be full length
Safety and Operation
Improper handling can cause accidents which may in turn lead to serious injury or
death. Always adhere to the following instructions when using this product:
• Never hold this product with the cutting head pointing towards someone else.
• Never allow the blade/blades to come into contact with your body.
• Always turn o the engine before making adjustments or when coming close to the cutting head.
Before Starting Work
Carefully check the work area and remove any obstacles. A perimeter of 15 metres of the work
area should be considered a hazardous area, into which no-one should enter while this product
is being used. When necessary this area should be marked with a warning rope, warning signs or
other forms of warning.
If work is to be carried out by two or more operators, care should be taken to constantly check
the location of other operators within the work area, to maintain a safe distance between each
operator.
Original Instructions Version July 18
455CSX/515CSX_030718
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455CSX / 515CSX PREMIUM Chainsaw
Before starting work all components of this product should be checked to make sure that it is
in proper working order. Ensure there are no loose screws or bolts, fuel leaks, ruptures, dents,
broken guards or any other problems which might aect the safe operation.
Keep all parts of your body away from the cutting head when the engine is running.
Before Starting the Engine
Place your machine on the ground in a flat, clear area and hold it firmly to ensure that neither the
cutting head or throttle come into contact with any obstacles when the engine starts.
After Starting the Engine
Ensure the cutting head stops moving when the throttle trigger is released (idle). If the cutting
head continues to move when the engine is at idle, adjust the idle screw on the carburettor to a
point where the cutting head stops moving. If this cannot be achieved, take your machine to your
authorised MITOX® dealer for adjustment.
Avoid Noise Problems
Check and follow the local regulations for sound levels and hours of operation for garden
machinery. In general, operate garden machinery between 8am and 5pm weekdays and 9am
and 5pm weekends. Avoid using garden machinery early in the morning and/or late at night.
Safety During Operation
When using your Chainsaw, grip the handles firmly with both hands, place your feet slightly apart
so your weight is distributed evenly across both legs and always be sure to maintain a steady even
posture while working. Do not use on ladders or if the ground surface is slippery or uneven. Never
attempt to cut overhead or with one hand.
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Original Instructions Version July 18
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
• Maintain full engine speed when cutting.
• Never allow other persons to come within the work area as doing so might expose them to
danger.
• If a branch or other object gets caught in the blades during operation, always turn o the
engine before removing the object.
• To protect yourself against injury from falling branches, wear the required safety equipment.
• Keep the operation area clear of all persons, particularly small children and pets. Injury may
result from flying debris.
• Never touch the spark plug or plug HT cable while
the engine is in operation, doing so may result in
an electrical shock.
• Never touch the exhaust, spark plug or any metallic parts of
the engine while the engine is in operation or immediately
after shutting down the engine. These parts reach high
temperatures during operation and doing so could result
in serious burns.
• When you finish cutting in one location and wish to continue work in another area, turn o the
engine, place the protective cover over the blades, and turn the chain saw so that the blades
face away from your body before carrying it to the new location.
• Always remove fuel from the fuel tank before transportation to prevent fuel spillage.
• When not in use never leave the chain saw exposed to direct sunlight as this can heat the fuel
tank and may cause a discharge of fuel, and flood the engine.
Original Instructions Version July 18
455CSX/515CSX_030718
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455CSX / 515CSX PREMIUM Chainsaw
In the Box
A standard saw unit package contains the items as illustrated
1) Power unit
2) Saw chain
3) Guide bar
4) Bar protector
5) Plug wrench
6) Chain File
Not pictured
7) Owner’s manual
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Original Instructions Version July 18
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
Safe Handling of Fuel
The engine of the Chainsaw is designed to run on a two stroke oil/fuel mixture.
This fuel is highly flammable; never store cans of fuel or refill the fuel tank in any place where
there is a source of heat or fire, which might ignite the fuel.
Do not smoke whilst operating or reflling the Chainsaw, keep lit cigarettes away from the
Chainsaw at all times.
When refilling the fuel tank always stop the engine first and carefully make sure that there are no
sparks or naked flames anywhere nearby before refuelling.
If any fuel spillage occurs during refuelling, use a dry rag to wipe any fuel which has been spilled
onto the Chainsaw before starting the engine.
After refuelling, screw the fuel cap back tightly onto the fuel tank and carry the Chainsaw to a
spot 5 metres or more away from where it was refuelled before starting the engine.
Two-Stroke Fuel
Fuel is very flammable. Do not smoke or bring any flame or sparks near fuel.
The engine is lubricated by oil mixed into petrol. Prepare a mixture of unleaded petrol and semi-
synthetic two-stroke oil that meets the specifications of: API TC, ISO-L-EGC, JASO FC (Low Smoke)
oil.
Recommended mixing ratio is 40:1.
Original Instructions Version July 18
455CSX/515CSX_030718
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455CSX / 515CSX PREMIUM Chainsaw
FUEL WITH NO OIL (RAW PETROL) will cause severe damage to the engine which is not
covered by the manufacturer’s warranty.
Use fresh, unleaded petrol (95 RON) and semi-synthetic oil specially made for high performance
two-stroke engines. Mix in a ratio of 40 parts petrol to 1 part of oil.
By using two-stroke oil specially made for two-stroke engines you will reduce the formation of ash
and carbon deposits on the spark plug, piston, exhaust muer and cylinder as well as reducing
emissions of harmful exhaust gases.
Oil FOR 4-CYCLE ENGINES should not be used as two-stroke lubrication oil as it can cause fouling
of the spark plug, exhaust port blocking, piston ring sticking and other internal engine damage.
Due to increased Ethanol content in petrol we recommend the use
of B3C Ethanol Shield 2-Stroke Oil, or Ethanol Shield Fuel Stabiliser
to protect your MITOX® engine against the harmful eects of
Ethanol.
Visit www.b3cfuel.co.uk for more information.
Fuel Storage (Without Ethanol Shield)
Mixed two-stroke fuel which has been left unused for a period of one month or more may
damage the carburettor and result in the engine failing to start or operate correctly.
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Original Instructions Version July 18
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
When storing the Chainsaw for a period of more than one month, empty the fuel tank and
run the engine to empty the carburettor of fuel.
Two-stroke fuel can cause deterioration of rubber and/or plastic components during prolonged
storage.
It is important to only use good quality, fresh fuel.
Fuelling
Shake the fuel container to thoroughly mix the two-stroke oil and petrol.
Clean dirt from around the fuel cap before removing.
Pour two-stroke fuel into the fuel tank with a filtered funnel, up to 80% of the fuel tank’s capacity.
Replace the fuel cap and tighten securely. Spilled fuel must be wiped away from the Chainsaw
before starting the engine.
Move at least 5m away from the refuelling area before restarting the engine.
When refilling the tank, always turn o the engine and allow it to cool down. Take a careful look
around to make sure that there are no sparks or open flames anywhere nearby before refuelling.
Chain Oil
Use only specialist anti fling chain oil. Fill the chain oil tank every time you fill the fuel tank.
Do not use waste or regenerated oil that can cause damage to the oil pump.
Original Instructions Version July 18
455CSX/515CSX_030718
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455CSX / 515CSX PREMIUM Chainsaw
Installing the Guide Bar and Chain
Open the box and install the guide bar and the saw chain on the power unit as follows:
The saw chain has very sharp edges. Use thick protective gloves for safety.
1. Pull the chain brake towards the front handle to check that the chain brake is not on.
2. Loosen the nuts and remove the chain cover.
3. Install the spike to the power unit (dependent on model).
4. Remove and discard the plastic packer located on the bar studs.
5 . Fit the guide bar over the bar bolts.
Figure 1. Figure 2.
Chain Direction
6. Figure 1. Fit the chain to the drive sprocket and while fitting the saw chain around the
guide bar, adjust the position of the chain tensioner located in position 7 to fit into
the hole (8) in the guide bar. 9 shows the chain tensioner screw.
7. Fit the chain cover to the power unit and fasten the nuts finger tight.
8. Figure 2. While holding up the tip of the bar, adjust the chain tension by turning the
tensioner screw (9) until the chain does not sag from the underside of the guide bar.
9. Tighten the bar nuts securely with the bar held up to 12/15N.M, then check the chain for
smooth rotation and proper tension while moving the chain by hand.
Note: A new chain will expand in length at the beginning of use. Check and readjust
the tension frequently, as a loose chain can easily derail or cause rapid wear to itself
and the guide bar.
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Original Instructions Version July 18
455CSX/515CSX_030718
455CSX / 515CSX PREMIUM Chainsaw
Chain Brake
This machine is equipped with an automatic brake to stop the saw chain rotation upon the
occurrence of kickback during saw cutting. The brake is automatically operated by inertial force,
which acts on the weight fitted inside the front guard. The brake can also be operated manually
by pushing the chain brake forward towards the guide bar.
To release the brake, pull back the chain brake (4) toward the front handle (1) until a “click” sound
is heard (2).
How to check:
You must check the chain brake operation before each usage by running the saw at full throttle
for 1-2 seconds and pushing the front hand guard (4) forward (3).
The chain should stop immediately with the engine at full speed.
If the chain is slow to stop or does not stop, replace the brake band and clutch drum before use.
Before proceeding to your job, it is recommended to first practice sawing easy logs. This also
helps you get accustomed to your unit.
Always follow the safety regulations:
The chainsaw must only be used for cutting wood. It is forbidden to cut other types of material.
Vibrations and kick-back vary with dierent materials and the requirements of the safety
regulations would not be met. Do not use the chainsaw as a lever for lifting, moving or splitting
objects. The saw should cut easily without force. Apply only light pressure while running the
engine at full throttle.
When the saw chain is caught in the cut, do not attempt to pull it out by force, but use a wedge
or a lever to suciently open the gap in the wood.
Original Instructions Version July 18
455CSX/515CSX_030718
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455CSX / 515CSX PREMIUM Chainsaw
Kickback Safety Precautions
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 you to lose control of the saw which could result in 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.
1. With a basic understanding of kickback you can reduce or eliminate the element of
surprise. Sudden surprise contributes to accidents.
2. 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 chainsaw handles. A firm grip will help you reduce
kickback and maintain control of the saw.
3. 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.
4. Cut at high engine speeds.
5. Do not overreach or cut above shoulder height.
6. Follow the manufacturer's sharpening and maintenance instructions for saw chain.
7. Only use replacement bars and chains specified by the manufacturer.
It is important to maintain the proper chain tension. Rapid wear of the guide bar or
the chain coming o can be caused by improper tension, especially when using a new
chain.
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Original Instructions Version July 18
455CSX/515CSX_030718
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