DuroStar DS4016CS User manual

CHAINSAW OWNER’S MANUAL
MODEL: DS4016CS
Caution: Before using our chain saw, please read this manual
carefully to understand the proper use of your unit
.
Keep this manual
available for reference at all times.

OWNER’S MANUAL
-1-
SAFETY FIRST
Instructions contained in warnings within this manual marked with a
concern critical points which must be taken into consideration to prevent possible
serious bodily injury, for this reason you are requested to read all the instructions
carefully and follow them without failure.
symbol
NOTES ON TYPES OF WARNINGS IN THE MANUAL
This mark indicates the instructions must be followed to prevent accidents which
could lead to serious bodily injury or death.
This mark indicates the instructions must be followed, otherwise it will lead to
mechanical failure, breakdown, or damage.
This mark indicates the hints or directions useful in the use of the product.
CONTENTS
1. Warning labels on the machine ……………………………………………… 2
2. Symbols on the macine ……………………………………………………… 3
3. Specifications ………………………………………………………………… 4
4. Safety precautions …………………………………………………………… 5
5. Installing guide bar and saw chain ………………………………………… 8
6. Fuel and chain oil …………………………………………………………… 9
7. Operating …………………………………………………………………… 11
8. Sawing ………………………………………………………………………… 13
9. Maintenance …………………………………………………………………… 15
10.Maintenance of saw chain and guide bar …………………………………… 17
11.Storage ………………………………………………………………………… 18
△
！WARNING
IMPORTANT
NOTE
12.Troubleshooting guide ……………………………………………………… 18

Owner’s Manual
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1.WARNING LABELS ON THE MACHINE
a. Read owner's manual before operating this
machine
b. Wear head, eye, and ear protection
c. Use the chain saw with two hands
d. Warning! Kickback danger
e. Warning/Attention
Never remodel the product. We won’t warrant the machine if you use the
remodeled product or you don’t observe the proper usage written in the manual.
△
！WARNING

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OWNER’S MANUAL
2. SYMBOLS ON THE MACHINE
For safe operation and maintenance, symbols are carved in relief on the
machine. Per these indications, please be careful not to make a mistake.
a. The port to refill the “Mixed Gasoline”.
b. The port to refill the “Chain Oil”.
c. Flipping the engine switch to “O” direction
will stop the engine.
d. Pulling out the choke knob closes the choke.
e. “MIN” direction - the oil flow decreases.
“MAX” direction - the oil flow increases.
f. The position of the Carburetor Adjustments
I
O

Owner’s Manual
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3. SPECIFICATIONS
Name Chain Saw
Type Single cylinder, air cooled, two stroke
Model DS4016CS
Displacement（cc）40
Max. Power/Speed
（kW/r/min）
1.2/8500
Ignition System Pointless(CDI)
Carburetor Diaphragm
Start Mode Recoil Starting
Spark Plug BPMR7A 、RCJ6Y 、L6RTC
Spark Plug Gap（mm）0.6~0.7
Fuel Mixture (40:1)
Lubricating Oil FC two-stroke engine oil
Chain Oil Bar & Chain Oil
Fuel Tank Capacity（oz.）10.48
0.7
1.0
Oil Tank Capacity（oz.）7.10
297X255X245
300X240X250
Sprocket（Teeth×Pitch）6T×0.375"
Guide Bar Size 16"
Pitch 0.375"
Gauge 0.050"
0.050"
Weight (Power unit only)
（kg）
9.92 lbs.

OWNER’S MANUAL
-5-
4.SAFETY PRECAUTIONS
BEFORE USING THE MACHINE
a. Read this owners manual carefully to understand how to operate this unit
properly.
b. You should never use the product when under the influence of alcohol,
when suffering from exhaustion or lack of sleep, when suffering from
drowsiness because of having taken cold medicine, or at any other time
when a possibility exists that your judgment might be impaired or that you
might not be able to operate the machine properly and in a safe manner.
c. Never use the product under circumstances like those described below:
1). When the ground is slippery or when other conditions exist which might
make it impossible to maintain a steady posture.
2). At night, at times of heavy fog, or at any other times when your field of
vision might be limited and it would be difficult to gain a clear view of the
area.
3). During rain storms, during lighting storms, at times of strong or
gale-force winds, or at any other times when weather conditions might
make it unsafe to use this product.
d. Lack of sleep, tiredness, or physical exhaustion results in lower attention
spans, this in turn leads to accidents and injury. Limit the amount of time
of using the machine continuously to somewhere around 10 minutes per
session, and take 10~20 minutes of rest between work sessions. Try to
keep the total amount of work performed in a single day under 2 hours or
less.
WORKING EQUIPMENT AND CLOTHING
a. When using the product, you should wear proper clothing and protective
equipment as follows.
(1) Helmet
(2) Protection goggles or face protector
(3) Thick work gloves
(4) Non-slip-sole work boots
(5) Ear protectors
b. And you should carry with you.
1) Attached tools and files.
2) Properly reserved fuel and chain oil.
3) Things to notify your working area (Rope, warning signs)
4) Whistle (for collaboration or emergency)
5) Hatchet or saw (for collaboration or emergency)

Owner’s Manual
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WARNING CONSIDERING HANDLING OF FUEL
a. The engine of this product is designed to run on a mixed
fuel which contains highly flammable gasoline. Never store
cans of fuel or refill the fuel tank in any place where here is
a boiler, stove, wood fire, electrical sparks, welding sparks,
or any other source of heat or fire which might ignite the
fuel.
b. Smoking while operating the product or refilling its fuel tank is extremely
dangerous. Always be sure to keep lit cigarettes away from the product
always.
c. When refilling the tank always turn off the engine first and take a careful
look around to make sure that there are no sparks or open flames
anywhere nearby before refueling.
d. If any fuel spillage occurs during refueling, use a dry rag to wipe up spills
before turning the engine back on again.
e. After refueling, screw the fuel cap back tightly onto the fuel tank and then
carry the product to a spot3ft. or more away from where it was refueled
before turning on the engine again.
BEFORE STARTING ENGINE
a. Check work area, the cutting object, and cutting direction. If there are
any obstacles, remove them.
b. Never start until you have a clear work area, secure footing, and a planned
retreat path from the failing tree.
c. Use caution and keep bystanders and animals out of the working area.
d. Inspect the machine and look for worn, loose, or damaged parts. Never
operate a machine that is damaged, improperly adjusted, or is not
completely and securely assembled. Make sure that the saw chain stops
moving when the throttle control trigger is released.
WHEN STARTING THE ENGINE
a. Always hold the machine firmly with both hands when the engine is running.
Use a firm grip with thumb and fingers encircling the handles.
b. Keep all parts of your body away from the machine when the engine is
running.
c. Before starting the engine, make sure the saw chain is not touching
anything.

OWNER’S MANUAL
-7-
WHEN OPERATING THE ENGINE
a. Keep the handles dry, clean, and free of oil or fuel mixture.
b. Never touch the muffler, spark plug, or other metal parts of the engine while
the engine is in operation or immediately after stopping the engine. Doing
so could result in serious burns or electrical shock.
c. Use extreme caution when cutting small size brush and saplings because
slender material may catch in the saw chain and be whipped toward you or
pull you off balance.
d. When cutting a limb that is under tension, be alert for spring back so that
you will not be struck when the tension in the wood fibers is released.
e. Check the tree for dead branches that could fall during the felling
operation.
f. Always shut off the engine before setting it down.
a. 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.
Tip contact in some cases may cause a lightning fast reverse reaction,
kicking the guide bar up and back towards the operator. Either of these
reactions may cause you to lose control of saw which could result in
serious personal injury.
b. 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 chain
saw 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. Don not let the nose of the guide bar contact a log,
branch, or any other obstructions 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.
△
！
WARNING

OWNER’S MANUAL
-8-
5.INSTALLING GUIDE BAR AND SAW CHAIN
A standard saw unit package contains the items as
illustrated
(1) power unit
(2) Bar protector
(3) Guide bar
(4) Saw chain
(5) Plug wrench
(6) Hexagon wrench
Open the box and install the guide bar and the saw
chain on the power unit as follows:
a. Loosen the nuts and remove the chain cover.
b. Gear the chain to the sprocket, while fitting the saw
chain around the guide bar, mount the guide bar to
the power unit. Adjust the position of chain tension
nut on the chain cover to the lower hole of the
guide bar.
(1) Tensioner nut
(2) Chain cover
Pay attention to the correct direction of the saw chain
a. Mount the bar to the studs of the power unit, and
fit the saw chain around the guide bar, adjust the
position of chain tensioner nut on the chain.
b. Tighten the tensioner screw.
(Style 1 or Style 2）
(1) Tighten
(2) Loosen
(3) Tensioner screw
A new chain will expend its length in the beginning of use. Check and readjust
the tension frequency as a loose chain can easily derail or cause rapid wear of
itself and the guide bar.
NOTE
NOTE
Style 1
（3
）
（1）
（2）
Style 2