Sencore S8100 User manual

SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SEN-
CORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE
SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SEN-
CORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE SENCORE
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SENCORE S8100 CUT-OFF SAW
Instruction Manual

Dear customer:
Thank you for purchasing the Sencore S8100 from our company.
Over the years our company has searched for a solution to the common problems encountered by contractors with their
hand-held concrete saws, after years of talking with contractors we found the most common problems with the saws in
the market today are the following:
• Improper fuel mixture in 2-Cycle Engines
 •ManualChokecausingoodingandinabilitytostartmotor
 •Difcultyintensioningbelt
• Lack of durability- poor build quality
• Weight of the tool itself
• Under powered saws that cannot complete the cut quickly and at the correct RPM.
 •Ineffectiveairltrationandcloggedairlters
• Poor weight distribution of the saw (balance)
• Pull start systems that constantly break
Thesewerejustsomeofthecomplaintsthatweheard,andweknewifwecouldndawaytoaddresstheseconcerns
we would have the best saw on the market today.
After years of searching and testing handheld saws we found a manufacturer that could make the saw that the market
was asking for. Our manufacturer, located in Germany, has 75 years of experience manufacturing 2-cycle engines for
the construction and agricultural markets. Their engineers were able to address all of the problems listed above and
even some that were not mentioned.
Thats how the Sencore S8100 was born!
• AutoLubeTM technology lets the saw determine how much oil needs to go into the cylinder for
optimum lubrication and maximum saw life
• Electronic choke determines the fuel air mixture needed to start at any temperature
• External screw for belt tensioning
• Highest quality parts used both inside the engine and out.
• 81 Cubic Centimeter engine for the highest power to weight ratio on the market.
 •Patentedtwinpipeairltrationsystemandexternalrockerswitchtocleanairlterwithoutopening  
 lterbox
• Longer handle design to increase ergonomics and better balance the saw for all-day comfort of use.
• Re-designed pull start with more durable internal parts and higher quality nylon cord
In addition to better design features we also kept operator safety in mind by adding:
• One-touch stop button
• Throttle control lock
• Electronic speed limiter
• Wheel guard for the cut off wheel
• Motor stop facility for maintenance purposes
We know that once you use our Sencore S8100 saw you will see for yourself that it is by far the best handheld cut-off
saw on the market today.
Instruction manual for the Sencore S8100 AutoLubeTM
Beforerstusingthistool,readtheseoperatinginstructionsthoroughlyandalwaysobserveallsafetyprovisionsand
instructions. If you have any further questions after reading these operating instructions, contact us directly at
888-313-0004.
Observe the maintenance guidelines closely to ensure the long service life of your equipment.

Packaging and disposal
Please keep the original packaging in order to protect the equipment against transport damage in case you ever need
to ship or transport it. If the packaging materials are no longer required they must be disposed of properly in accor-
dance with applicable local regulations. Cardboard packaging materials are raw materials which can be recycled or
reused.
At the end of the equipment’s service life, please make sure that you dispose of it in accordance with the local provi-
sions.
Patents
The following patents have been granted:
• PCT/EP2011067574 (separate lubrication)
• US20120152200 (airbox)
• US20100206278
• US20100000846
• US20090007435
• EP2011594
• EP2011991
• EP2011992
Registered brands and trademarks
Sencore®and AutoLube®are registered brands of Sencore Construction Prodcts.
Any other product and company names named in these operating instructions may be registered brands or trade-
marks of the respective manufacturer. Use of these names by third parties for their purposes may injure the rights of
the manufacturer. The fact that the ® or ™ sign is missing does not mean that the designation is a free brand name.
Reservation of changes
In the interest of continuous further development of the motor devices, we must reserve changes to the delivery scope
in form, technology and equipment.
Please understand that no claims can be derived from information and illustrations in these instructions.
QUICK REFERENCE HOW TO VIDEO’S ON YOUTUBE.COM
HOW TO CHANGE
SPARK PLUG
HOW TO CHANGE
DECOMPRESSION
Valve
HOW TO CHANGE
STARTER
HOW TO CHANGE
carburetor
HOW TO CHANGE
PISTON & CYLINDER
HOW TO CHANGE
AIR FILTER

1Information about these operating instructions................................................................................................5
1.1 Notational conventions used in the operating instructions.............................................................................5
2Warning, instruction and notice icons ...............................................................................................................5
3Safety provisions..................................................................................................................................................7
3.1 Correct use ....................................................................................................................................................8
3.2 General safety notes......................................................................................................................................9
3.3 Personal protection equipment (PPE) ...........................................................................................................9
3.4 When fueling up.............................................................................................................................................9
3.5 In transport.....................................................................................................................................................8
3.6 During assembly, cleaning, maintenance and repair .....................................................................................9
3.7 Before start-up .............................................................................................................................................10
3.8 When starting...............................................................................................................................................10
3.9 During work..................................................................................................................................................10
3.10 Dust emission ..............................................................................................................................................11
4Power tool description.......................................................................................................................................12
4.1 Scope of delivery .........................................................................................................................................12
4.2 Type plate ....................................................................................................................................................14
4.3 Device views and important operating and function parts ...........................................................................14
4.4 Throttle control lock and throttle control.......................................................................................................14
4.5 Function parts for starting ............................................................................................................................14
4.6 Technical data..............................................................................................................................................15
5Preparing for use................................................................................................................................................16
5.1 Installing the cut-off blade............................................................................................................................16
5.2 Installing cut-off blade with 1” inner bore .....................................................................................................17
5.3 Removing the cutoff blade ...........................................................................................................................17
5.4 Adjusting the blade guard ............................................................................................................................18
5.5 Fueling up ....................................................................................................................................................18
5.6 Adjusting the ribbed belt tension..................................................................................................................19
5.7 Water connection for wet cutting .................................................................................................................19
5.8 Relocate cutting device from center position to outer position ....................................................................20
5.9 Initial starting / run-in behavior.....................................................................................................................22
6Starting up and switching off the engine .........................................................................................................22
6.1 Starting process...........................................................................................................................................22
6.2 Start-up position...........................................................................................................................................23
6.3 Switching on the engine...............................................................................................................................23
6.4 Switching off the engine...............................................................................................................................23
7Power tool use ....................................................................................................................................................24
7.1 Cut-off blades ..............................................................................................................................................25
7.2 Permissible cutting area and danger from kickback or pinching..................................................................25
7.3 Working behavior and working technique....................................................................................................26
7.4 Cutting metal................................................................................................................................................26
7.5 Cutting mineral materials .............................................................................................................................26
8Operating and maintenance notes....................................................................................................................27
8.1 Cleaning and care........................................................................................................................................27
8.2 Cleaning the screen lter insert of the connection piece .............................................................................28
8.3 Idle/carburetor adjustment ...........................................................................................................................28
8.4 Air lter maintenance ...................................................................................................................................29
8.5 Spark plugs check and replacement if required...........................................................................................30
8.6 Ribbed belt replacement..............................................................................................................................31
8.7 Fuel lter replacement .................................................................................................................................33
8.8 Maintenance plan ........................................................................................................................................34
8.9 Self-aid advice .............................................................................................................................................34
8.10 Shutting down and storage ..........................................................................................................................35
9Warranty ..............................................................................................................................................................35
10 Wear parts ...........................................................................................................................................................35
11 Emission control warranty statement ..............................................................................................................45
12 Parts list with Price List .....................................................................................................................................38
Table of Contents
4 SENCORE S8100 CUT-OFF SAW MANUAL

These operating instructions are an integral part of the motor device.
Theycontainimportantinformationandinstructionsforhandlingthemotordevice.Alwaysfollowanyspeciedsafety
regulations and instructions, as they are a prerequisite for ensuring that you are working safely with the equipment.
These operating instructions must be kept available at the place of use of the equipment at all times, and they must be
read carefully by everyone who works on or with the equipment (including for maintenance, care and repairs).
These operating instructions must only be used as operating instructions for the motor device S8100.
Any utilization of the contents (text and graphics illustrations) – even in excerpts – without our prior written consent
shall be forbidden and may be prosecuted.
Text highlights
Xxxxx Underlined text marks interim headlines.
Xxxxx Text in italics marks advice and notes that facilitate use of the motor device for the user.
1 Xxxxx Numbered text with a black background marks main chapter headlines.
1.1 Xxxx Numbered text with a grey background marks main subchapter headlines.
Xxxxxxx Frames mark especially highlighted sections.
Structure
The operating instructions are structured by numbered main and subchapters. The table of contents on page 3 shows
an overview of the structure.
Header
Tomakeiteasierfortheusertondthechapters,theheadernamesthemainchaptertowhichthecontentonthere-
spective page belongs.
Pictures and diagrams
Some graphical illustrations in these operating instructions are schematic illustrations or principle illustrations and may
not show exactly your device model. The conveyed contents, however, are binding in any case.
Important: If one or several icons in these operating instructions are centered and directly below a chapter header
the notice applies for the entire chapter.
2 Warning, instructions, and notice icons
1.1 Notational conventions used in the operating instructions
1 Information about these operatiing instruction
SENCORE S8100 CUT-OFF SAW MANUAL 5

Warning! Failure to comply with the instructions could cause accidents with potentially life-threatening inju-
ries.
Caution! Failure to comply with the instructions could result in damage to the equipment or other material
damage.
Carefully read the operating instructions. This applies before placing the equipment into operation and before
any cleaning, maintenance or assembly work.
Always wear the prescribed clothing. Chap. 3.3, page 8
Always wear sturdy shoes with good grip.
Wear safety gloves. This applies to all work with or on the equipment.
Before starting the engine, put on hard hat, hearing protection, face shield and safety glasses.
Switch off the engine!
Smoking is prohibited anywhere near the power tool and in the location where it is refueled!
Keepthepowertoolandfuelcanistersawayfromopenames.
Warning: Danger of poisoning! - The power tool generates exhaust gases.
- Gasoline vapors are toxic.
- Dangerous dust emissions when working.
Warning: Kickback!
Notes in chap. 7.2 as of page 27 must be observed under all circumstances!
Warning:Dangerofrefromsparks.
Wear breathing protection equipment.
Never use toothed circular saw blades such as the type used to cut wood products.
Never use a damaged cutoff wheel.
Onlyusecutoffwheelsapprovedforaspeedof≥4,550min-1 [4,550 RPM].
VibratordialforinterimemptyingoftheairlterChap. 8.4, page 29
Noise level LWA = 110 dB(A)
AutoLube = Smart lubrication
Fuel tank Chap. 5.5, as of page 18
Oil tank (green cap) Chap. 5.5, as of page 18
Starting notes Chap. 6, as of page 22
Auto
Lube
6 SENCORE S8100 CUT-OFF SAW MANUAL

3.0 Safety Provisions
3.1 Correct Use
3.2 General Safety Notes
This power tool must only be used to cut/shorten metals (hot cut) and mineral materials, such as concrete (cold cutting). Use
only the cutoff wheels approved for the material being cut and only for the working situation indicated in chap. 7 on page 26.
For specically trained users in rescue missions, other approved cutoff wheels are also offered that can be
used to cut various composites. These special applications are only permitted to specically trained users.
This power tool must only be used for outdoor work.
Use of this power tool for any other purpose, such as sawing of wood and to remove/grind off a material using the side
surfaces of the cutoff wheel is forbidden. Unapproved cutting tools, such as wood saw blades or knives, must never be
installed on the motor device.
Before using the power tool, read these operating instructions thoroughly and keep them in a safe and accessible
location. They must be kept available at the place of use of the equipment at all times, and they must be read by
everyone who works on or with the equipment (including for maintenance, care and repairs).
Use this power tool with care. Improper or careless use of this power tool could cause serious injury or death. The tool
can generate large forces and torques resulting from the high speed rotation of the cutoff wheel.
Working with and on the power tool must be done carefully and with the greatest care. Assess all risks before proceeding.
Never perform any work procedures that you have not been trained for. If you are still unsure after studying these
operating instructions, ask a specialist for help.
Theignitionunitofthispowertoolgeneratesanelectromagneticeldinoperation.Thiseldmayaffectthefunction
of pacemakers under certain conditions. Persons with a pacemaker must consult their physician and the pacemaker
manufacturer before using this power tool.
Generalinformationonvibration:Thefollowingsymptomsmayoccurfromfrequentvibrationofngers,handsorwrists:
Fingers, hands or wrists falling asleep, tingling, pain, stabbing pain, changes of the skin tone or skin. If such symptoms
are found, see a physician.
Failure to observe the safety notes may be potentially fatal. Check ANSI and OSHA and other local regulations before
proceeding.
 •Foranyaccidentsthatmayoccur,arstaidkitmustbepresentattheworkplaceatalltimes.Itemsthat 
 havebeenremovedfromyourrstaidkitmustberelledatonce.
 •Dangerofrefromsparks!Whenworkingclosetoeasilyammableobjectsorvegetation,areextinguisher
must be provided.
 •Arsttimeoperatorshouldobtainpracticalinstructionbyaspecialistbeforeusingthepowertool.Employers
must establish a training program for operators of gasoline-powered, hand-held portable, cut off machines to
assure safe operations of these power tools.
• Children and teens (minors) under 18 years of age must not work with this power tool.
• The power tool generally must be operated by only one person – also when starting up. Keep unnecessary
personnel away from the work area. Do not work around animals. If a person or animal approaches, the
power tool must be stopped at once. The user is responsible for any injury and property damage he causes.
• This power tool must only be used by persons who are familiar with this type of machine, its operation and
the operating instructions. Never lend this tool to untrained personnel. Always include these
operating instructions.
• Only work with this power tool when you are in good shape, rested and healthy.
 •Personsundertheinuenceofalcoholordrugs,includingprescriptiondrugs,shouldneverusethispower 
tool, as their ability to quickly react to potential danger may be impaired.
• Never operate this power tool when you are fatigued or exhausted. Tiredness and exhaustion may result in
loss of control. Be alert – if you get tired or exhausted while operating your power tool, take a break.
Working with the power tool can be strenuous. If you have any condition that might be aggravated by
strenuous work, check with your doctor before operating this power tool.
• Never cut or disturb asbestos, asbestos-containing materials or any other known hazardous materials.
SENCORE S8100 CUT-OFF SAW MANUAL 7

 •Beawareofhiddenhazards,suchaselectricalcables,waterorgaspipesandammablesubstancesinthe
area to be cut!
• When cutting pre-tensioned and steel-reinforced concrete pillars, observe all instructions and standards
that the respective authorities or component manufacturers have stipulated. Cutting of reinforcement bars
must be performed in the prescribed order and under consideration of the relevant safety provisions.
• Never operate this power tool when you are fatigued or exhausted. Tiredness and exhaustion may result in
loss of control. Be alert – if you get tired or exhausted while operating your power tool, take a break. Working
with the power tool can be strenuous. If you have any condition that might be aggravated by strenuous work,
check with your doctor before operating this power tool.
• Never cut or disturb asbestos, asbestos-containing materials or any other known hazardous materials.
 •Beawareofhiddenhazards,suchaselectricalcables,waterorgaspipesandammablesubstancesinthe
area to be cut!
• When cutting pre-tensioned and steel-reinforced concrete pillars, observe all instructions and standards
that the respective authorities or component manufacturers have stipulated. Cutting of reinforcement bars
must be performed in the prescribed order and under consideration of the relevant safety provisions.
• Never alter, change or modify any safety equipment or functional assemblies of this power tool.
• Prevent accidents! Only use this power tool if it is in good, safe condition! Always check the power tool prior to use.
• Only use those accessories and attachments that have been supplied and approved for attachment to this
power tool by us. Only cut off wheels approved for this power tool must be used as cutting tools.
• Reliable operation and safety of this power tool also depend on the quality of the spare parts used. Use
only genuine spare parts. Original spare parts are identical with original production parts and guarantee
the best quality in material, dimensions, function and safety. Original parts and accessories are available
from your dealer. Your dealer has been supplied with appropriate documentation to determine the correct
parts. Your dealer is frequently supplied with updates about improvements to the equipment. Please note
that the use of non-original parts will void your warranty.
• Always store the power tool in a safe place and in such a way that it will not pose any danger. Stop the engine.
Never let the power tool run unsupervised!
Persons who disregard safety instructions, operating or maintenance instructions are liable for any damage or
consequential losses.
3.3 Personal Protective Equipment (PPE)
In order to prevent injuries, please make sure that you wear the prescribed clothing and protective equipment.
Clothesshouldbetight-tting(notloose),butnothindering.Whenperforminganywork,wearaworkingsuit
ofrmmaterialswithsufcientameinhibitionthatcannotignitebyyingsparks(materialsofleather,cotton
afterame-inhibitingtreatmentorheavyclose-meshedlinenfabrics).Checktheinformationintheworkclothes
andensurethatnon-ammablematerialsandnosyntheticmaterialslikepolyesterornylonarecontainedinthe
clothes.Theworkingclothesmustneverbecontaminatedwithammablesubstancessuchasgasolineorsimilar
products.Do not wear scarves, ties, jewelry or other clothes that may get caught in the cut off wheel, objects in
the environment, or the power tool. Tie back long hair and secure it under a hard hat.
Wear a protective hard hat during any work. Use personal hearing protection. Eye and face protection is
mandatory pursuant to ANSI Z 87.1.
Wear protective gloves with non-slip palms.
When wet cutting is not utilized, the operator and bystanders should always wear breathing protection equipment
approved by NIOSH/MSHA for the material being cut.
Wearrmsafetyshoeswithsteeltoesandagoodgrip
8 SENCORE S8100 CUT-OFF SAW MANUAL

3.4 When Fueling Up
3.5 In Transport
Gasolineishighlyammable.Keepawayfromopenameanddonotspillfuel.Donotsmokeattheworkplaceoratthe
site of fueling!
• Always switch off the engine before fueling.
• Fire hazard! Never refuel while the engine is still hot!
• Always carefully open the tank cap so that any overpressure present can reduce slowly and no fuel will splash out.
• Prevent skin and eye contact with fuel and other mineral oil products by wearing protective clothing, eye and face
protection. In case of eye contact, rinse at once with lots of clear water. In case of persistent irritation, see a
doctor immediately!
• Regularly change and clean protective clothes.
• Avoid breathing in fuel vapor.
• The refueling site should be well ventilated.
• Avoid any soil spillage of fuel or oil (protection of the environment). Use a suitable mat.
• Immediately clean any fuel spilled on the power tool. Change contaminated clothing without delay.
• Alwaystightenthefueltankcaprmlybyhandwithoutusinganytools.Tankcapsareequippedwithan  
overturning protection and must be turned closed until a clear “Clicking”. The fuel tank cap must not be able to work
itself loose as a result of the vibrations of the engine.
• Danger to life from burns! Observe leaks. Do not start up and work when fuel is escaping.
• Fuels and oil must only be stored in properly and correctly labeled containers.
• Before carrying the power tool (even across short distances from one working area to the next), always turn off the
engine and wait until the cut off wheel has stopped. Carry the power tool by the top handle and have the cut off
wheel point backwards.
• Dangerofburns!Donottouchthehotmufer.
• Never carry or transport the power tool with the cut off wheel running.
• To avoid spilling of fuel and oil and to prevent damage, the power tool must be secured against tipping
when transporting it in vehicles. Check the tanks for fuel and oil for tightness.
Recommendation: Empty the tanks before transport.
• Empty the tanks before shipping.
• Remove cut off wheel before shipping.
Recommendation: Keep the original packaging in order to protect the equipment against transport damage in case you
ever need to ship it or transport it.
3.6 During Assembly, Cleaning, Maintenance, And Repair
• Thepowertoolmustnotbeassembled,maintained,repairedorstoredinthevicinityofopenames.
• Before assembly, cleaning, maintenance and repair, always turn off the engine; the stop dial must be set to "0" and
the cut off wheel must have stopped. Only the idle speed setting must be performed with the engine running.
• Wear protective gloves for any work.
• he power tool requires regular maintenance. Only perform such maintenance and repair work on your own that
are described in these operating instructions and that you consider yourself skilled at performing. Any other work
must only be performed by specialist workshops authorized by us.
• Dangerofburns!Donottouchthemuferwhileitisstillhot–notevenformaintenanceortocheckitfortightt.
• Only perform repairs with original spare parts.
• Danger of accident and injury! Never modify the power tool, as this may impair safety!
SENCORE S8100 CUT-OFF SAW MANUAL 9

3.7 Before Start-Up
3.8 When Starting
3.9 During Work
Before start-up, check the entire power tool for operationally safe conditions. In addition to the notes in the operating
and maintenance notes (chap. 8, page 27), check the following items:
• Stop dial and one-touch stop button must be easy to operate.
• The throttle control must move freely and return automatically to the idle position. It must not be possible to operate
the throttle control without pushing (unlocking) the throttle control lock (throttle control locked).
•Thecutoffwheelmustbeattachedrmlytothespindle.
•Dangerofre!Ignitioncableandsparkplugconnectormustbermlyinplace.Looseconnectioncanresultin 
sparks which could ignite any escaping fuel/air mixture!
• In case of irregularities, visible damage, improper settings or limited function, the power tool must not be started. In
such cases, have the power tool inspected by specialist workshops authorized by us.
• Only use the power tool if it is in completely assembled condition.
• Keep at least 3 meters [approx. 10 feet] distance from the fueling site when starting.
Never start the power tool in closed rooms.
•Holdthetoolsecurelyandrmlywhenstarting.
Always start up on level ground and securely hold the power tool.
• Perform the starting process as described in chap. 6 on page 22.
• Check the idle setting after starting. The cut off wheel must not rotate in idle mode.
In addition to the safety provisions already listed, the following safety provisions also apply when working with the motor
device:
• Danger of poisoning! Once the engine is running, the power tool produces toxic exhaust that may be invisible and
odorless. Never start the power tool in closed rooms. Special danger also applies in narrow situations, troughs or ditches.
Onlyworkherewhenitisabsolutelycertainthatthereissufcientairexchangeandthatnotoxicgasesmayaccumulate.
•Increaseddangerofre!Donotsmokeattheworkplace–notevenintheproximityofthepowertool.
• Secure the workplace against accidental access by third parties, e.g. with warning signs. Only persons involved and
wearing adequate protective equipment and clothes must be present within 30 meters [approx. 30 yards] around the
working area.
• Check the site of deployment for possible dangers.
– Spark formation during cutting means that work must never be performed close to potentially explosive gases of
liquids,oreasilyammableobjects.
–Noelectricallines,waterorgaspipesorammablesubstancesmustbeplacedintheareatobecut.
–Objectsthatmayfalloffortoppleoverduringworkmustbesecuredorremovedfromtheworkingenvironmentrst.
– Prepare the workplace so that secure operator mobility is possible.
• The work piece to be cut must be free of foreign bodies such as screws, nails or stones.
• When working in residential areas, observe the noise protection provisions.
• Work carefully, considerately and calmly and do not endanger others.
– Ensure good sight and light conditions.
–Alwaysremainwithincallingdistanceofotherpersonswhomayadministerrstaidinemergencies.
– Schedule work breaks.
10 SENCORE S8100 CUT-OFF SAW MANUAL

– Be attentive towards possible danger sources and take the corresponding preventive measures.
Consider that use of hearing protection limits perception of sounds. Signal sounds, calls, etc. that announce danger may
also be missed.
– Observe tripping dangers and obstacles. Never work on unstable grounds.
–Alwaysholdthepowertoolwithbothhandsandalwaysensureasafeandrmstance.
– Never cut standing on a ladder.
– Guide the power tool so that no body part is located in the extended swivel range of the cut off wheel.
– Do not hold the work piece in your hand and bring it into contact with the wheel.
– Bring the rotating cut off wheel into contact to the work piece.
Nevertouchtheoororotherobjectswiththecutoffwheelrunning.
– Do not use the power tool to level off and shovel away objects.
• Switch off the engine when the power tool starts to behave noticeably differently.
•Dangerofburns!Donottouchthemuferwhileitisstillhot.
Dangerofre!Muferradiatesenormousheat.
Neverputthehotpowertoolintodrygrassoronammableobjects.
• Danger of hearing damage and burns!
Neverworkwithdefectivemuferorwithoutmufer.
3.10 Dust Emissions
Grinding/cutting/drilling of masonry, concrete, metal and other materials can generate dust, mists and fumes containing
chemicals known to cause serious or fatal injury or illness, such as respiratory disease, cancer, birth defects or other
reproductive harm.
California and some other authorities, for instance, have published lists of substances known to cause cancer, reproductive
toxicity, or other harmful effects.
• If you are unfamiliar with the risks associated with the particular process and/or material being cut or the composition
of the tool being used, review the material safety data sheet and/or consult your employer, the material manufacturer/
supplier, governmental agencies such as OSHA and NIOSH and other sources on hazardous materials and make
certain to comply with all product warnings and instructions for the safe and effective use of the material being cut.
• Control dust, mist and fumes at the source where possible. In this regard use good work practices and follow the
recommendations of the manufacturer/supplier, OSHA/NIOSH, and occupational and trade associations. Water should
be used for dust suppression when wet cutting is feasible.
• When the hazards from inhalation of dust, mists and fumes cannot be eliminated through engineering controls such
as vacuum and/or water mist, the operator and any bystanders should always wear a respirator approved by NIOSH/
MSHA for the material being cut.
Grinding/cutting/drilling of masonry, concrete and other materials with silica in their composition may give off dust or mists
containing crystalline silica. Silica is a basic component of sand, quartz, brick clay, granite and numerous other minerals
and rocks. Repeated and/or substantial inhalation of airborne crystalline silica can cause serious or fatal respiratory
diseases, including silicosis. In addition, California and some other authorities have listed respirable crystalline silica as
a substance known to cause cancer.
• When cutting such materials, always follow the respiratory precautions mentioned above.
SENCORE S8100 CUT-OFF SAW MANUAL 11

4 Power Tool Description
4.1 Device Views, Important Operating, And Function Parts
1. Cutoff wheel 17. Stop dial / one-touch stop button
2. Wheel guard 18. Fuel tank cap
3. Handle for wheel guard adjustment 19. Oil tank cap, green
4. Top handle 20. Primer
5. Guard 21. Decompression valve
6. Rear handle 22. Idle stop screw “T”
7. Twin-pipe intake openings 23. Carburetor adjustment screws “L” and “H”
(for trained service technicians only)
9. Throttle control lock 24. Water coupling connection (wet cutting)
10. Throttle control 25. Mufer(exhaust)
11. Cutoff wheel attachment screw 26. Standing base
12. Cutoff wheel blockage opening 27. Screenltercouplingadapterofthewatersupply
line
13. Ribbed belt tensioning screw 28. Valve lever for water supply
14. Ribbed belt cover 29. Vibration dial
15. Type plate 30. Water supply line (wet cutting)
16. Starter handle 31. Starter and fan housing with cooling air openings
1
2
4
5
6
9
10
12
13
14
15
17
24 26
27 28
29
30
3
12 SENCORE S8100 CUT-OFF SAW MANUAL

16
18 19
20
21
22 23
31
1
2
345
17
6
9
10
11
25
16
4
5
30
1
11
26
2
30
24
3
19
18
15
24
20
17
7
9
6
SENCORE S8100 CUT-OFF SAW MANUAL 13

4.2 Scope Of Delivery
4.3 Type Plate
• Basic device
• Spindle adapter disk for cut off wheels with 1” Arbor
•Tools: Combination tool (spark plug wrench with screwdriver), blocking pin and additional small screwdriver
• These operating instructions
a: Type designation
b: Serial number
c: Bar code
d: Year of build
4.4 Throttle Control and Throttle Control Lock
Release of the throttle control (10)
• Grasp rear handle (6) with the right hand.
The throttle control lock (9) is operated with the palm.
 The throttle control (10) is released.
4.5 Funtional Parts For Starting
In the delivery condition, after extended resting time and
with the tank completely empty, there is no fuel yet in the
carburetor after fueling up.
Starting process: Chap. 6.1, page 22
To facilitate the starting process, fuel can be pumped into
the carburetor. Push the primer (20) repeatedly until fuel
appears in the primer.
Excess fuel is automatically ushed back into the tank
from the primer.
Starter handle (16) and starter rope:  Chap. 6.3, page 23
6
9
10
20
c
a
b
d
14 SENCORE S8100 CUT-OFF SAW MANUAL

When the decompression valve (21) is depressed, the
compression pressure in the combustion chamber
is reduced. This means that the engine offers less
resistance during start-up, which makes it noticeably
easier to start the engine.
Starting process: Chap. 6.1, page 22
The decompression valve is closed automatically when
the motor is running.
If you need to pull the starter handle (16) more than once
to start the engine (e.g. during a cold start), you do not
need to depress the decompression valve again.
Decompression valve (21)
4.6 Technical Specication Data
1In determining the above mentioned values regarding the acceleration of vibrations and sound, the different operating conditions were weighted in accordance with the current standards.
2Insecurity K purs. to EC directive 2006/42/EC: 2.5 dB(A)
3Insecurity K purs. to EC directive 2006/42/EC: 2 m/s2 [78.7 "/s2]
Model Sencore S8100
Motor Single-cylindertwo-strokemotor,four-channelushing
Engine capacity 81 cm3[4.94 cu.in]
Bore Ø / stroke 52 mm / 38 mm [2.0” / 1.5”]
Max. power at RPM 4.0 kW / 9,300 1/min [5.36 HP / 9,300 RPM]
Max. torque at RPM 4.8 Nm / 7,000 1/min [3.54 ft·lbf / 7,000 RPM]
Max. permissible speed (9,500 ±200) 1/min [(9,500 ±200) RPM] (no load with cutoff wheel)
Idling speed (2,600 ±200) 1/min [(2,600 ±200) RPM]
Clutch engagement speed (4,000 ±200) 1/min [(4,000 ±200) RPM]
Fuel tank capacity 0.9 l [30 oz]
Oil tank capacity 0.32 l [10.8 oz]
Fuel mix ratio gasoline:oil 50:1
Electronically controlled separate lubrication ü
Fuel consumption at max. power (ISO 7293) 1.75 kg/h [3.86 lbs/h]
Specicconsumptionatmax.power(ISO7293) 460 g/kWh [0.76 lbs/HP·h]
Carburetor, with primer Position-independent, electronically controlled
Airlter Paper
Ignition Electronic digital ignition with index
Cutoff wheel: Diameter
Bore diameter
Tightening torque of the attachment screw
14”
20 mm or 1”
(30 ±2) Nm [22.1 ±1.48 ft·lbf]
Minimumangeouterdiameter 100 mm [3.9”]
Spindle diameter 20 mm [0.787”]
Maximum spindle RPM 4,550 1/min [4,550 RPM]
Cutting depth, max. 125 mm [4.9”]
Dimensions: height / width / length 430 mm / 267 mm / 775 mm [16.9” / 10.5” / 30.5”]
Weight without tank content and without cutoff wheel
10.5 kg [23.1 lbs]
Sound level1,2 LPeq (EN ISO 19432 Annex B) 98 dB(A)
Sound power level1,2 LWeq (EN ISO 19432 Annex B) 108 dB(A)
Weighted effective acceleration1,3 ahv,eq
(EN ISO 19432 Annex C): rear handle / top handle 4.5 m/s2/ 6.0 m/s2[177 “/s2/ 236 “/s2]
16
21
SENCORE S8100 CUT-OFF SAW MANUAL 15

5 Preparing For Use
5.1 Installing The Cut-Off Wheel
Thecutoffwheelsusedmustcorrespondtothespecicationsfromchap.7.1onpage25!
The power tool spindle is designed for cut off wheels with an arbor of 20 mm.
Cut off wheels with 1” arbor must only be installed together with the spindle adapter disk. Installation of cut off
wheels with 1” arbor: Chap. 5.2, page 17!
When using cut off wheels with an arbor of 20 mm, no additional spindle adapter disk is required.
• For cut off wheel installation, the power tool must be put securely on the ground. Securely hold the power tool at the
tophandlewiththelefthandandpushitrmlyontotheground.Chap. 5.4, page 18
• Insert blocking pin (a) entirely into the cut off wheel blocking opening (12) to block the spindle.
Unscrewcutoffwheelattachmentscrew(11).Removewheel(b)andoutermountingange(c).
• Put cut off wheel (1) on spindle.
Forcutoffwheelswithspeciedrotatingdirection(arrowonthecutoffwheel),observecorrectalignmentofthecutoff
wheel during assembly (for rotation direction of the cut off wheel, see above).
•Pushonoutermountingange(c)sothatthecurvedsidepointssouthwards,i.e.awayfromthecutoffwheel.
• Push on wheel (b) and turn in cut off wheel attachment screw (11).
•Insertblockingpin(a)entirelyintotheblockingopening(12)andrmlytighten(30Nm[22.1ft·lbf])thecutoffwheel
attachment screw (11).
Securelyholdthepowertoolatthetophandlewithonehandandpushitrmlyontotheground.
• Remove the blocking pin (a).
a
12
11
c
b
Blade rotational direction
c
b
11
1
16 SENCORE S8100 CUT-OFF SAW MANUAL

5.2 Installing Cut-Off Wheel with 1” Arbor
Thecutoffwheelsusedmustcorrespondtothespecicationsfromchap.7.1onpage25!
The power tool spindle is designed for cut off wheels with an arbor of 20 mm.
Cut off wheels with 1” arbor must only be installed together with the spindle adapter disk. Installation of cut off
wheels with 1” arbor: Chap. 5.2, page 17!
When using cut off wheels with an arbor of 20 mm, no additional spindle adapter disk is required.
• Installation of cut off wheels with 1” arbor takes place
according to chap. 5.1 as of page 16.
• After applying the cut off wheel on the spindle,
however, the spindle adapter disk (e) must be put on
the spindle (f) additionally.
• Put the spindle adapter disk (e) onto the spindle so
that it inserts between spindle and inner bore of the cut
off wheel.
The support area of the spindle adapter disk must point
outwards in the installed condition, i.e. away from the
spindle.
The correct orientation of the spindle adapter disk is
mandatory to directly connect the plane inner area to
oftheoutermountingangetothecutoffwheel.Only
this warrants secure attachment of the cut off wheel.
• Application of the outer mounting ange and all
following steps must be performed again according to
chap. 5.1.
5.3 Removing The Cut-Off Wheel
• For cut off wheel removal, the power tool must be put securely on the ground. Securely hold the power tool at the top
handlewiththelefthandandpushitrmlyontotheground.Chap. 5.4, page 18
• Insert blocking pin (a) entirely into the cut off wheel blocking opening (12) to block the spindle.
Unscrew cut off wheel attachment screw (11).
Removewheel(b)andoutermountingange(c)(alsoseechap.5.1).
• Remove cut off wheel from the spindle. For cut off wheels with a 1” arbor, the spindle adapter disk also must be
removed from the spindle.
•Puttheoutermountingangebackontothespindlesothatthecurvedsidepointsoutward.
• Put on wheel (b) and turn in the cut off wheel attachment screw (11) again. Chap. 5.1.
•Insertblockingpin(a)entirelyintotheblockingopening(12)andrmlytighten(30Nm[22.1ft·lbf])thecutoffwheel
attachment screw (11) again.
Securelyholdthepowertoolatthetophandlewithonehandandpushitrmlyontotheground.
• Remove the blocking pin (a).
f
e
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SENCORE S8100 CUT-OFF SAW MANUAL 17

5.4 Adjusting The Wheel Guard
The wheel guard (2) can be rotated forward and
backward in a limited area.
For adjustment of the wheel guard, the power tool must
in the off position and the cutting wheel must be stopped
from rotation. Put the power tool securely on the ground.
Securely hold the power tool at the top handle (4) with
thelefthandandpushitrmlyontotheground.Withthe
right hand at the handle for wheel guard adjustment (3),
rotate the wheel guard accordingly.
To keep sparks and particles away from the user, the
wheel guard always must be rotated forward as far as
the working situation permits.
If the separating device has been installed in the outer position, ensure when adjusting the wheel guard that the
water supply line is not clamped and that contact between the cut off wheel and water supply line in operation
is excluded.
5.5 Fueling Up
Danger to health!
Direct skin contact with gasoline and breathing in of gasoline fumes must be avioded.
Model S8100 with Auto LubeTM.
Fuel tank (18) for lead-free midgrade gasoline or
lead-free premium gasoline with a minimum pump
octane number of 89 (R+M)/2.
Donotllanypre-mixedfuelintothefueltank(18)!
Oil tank (19, green cap) for branded 2 stroke engine
oil corresponding to the standard ISO L EGD or
JASO FD.
Recommendation:
Use the “Sencore high performance semi-synthetic
2 stroke engine oil”
If there is not enough oil in the oil tank, the power
tool will automatically run at idle speed and will not
reach the speed required for work, which will be
noticed by changed noise generation as compared
to regular operation.
Atthispointatthelatest,oilmustberelled.
TheS8100isequippedwithafueltankandanoiltankeachthatmustbelledaccordingtothespecicationbelow
The fuel mix is automatically formed during operation in these models (separate lubrication, AutoLubeTM, Automatic
Lubrication).
Fill in operating media (gasoline and oil)
Observe the safety provisions when fueling up. Fuel up only with the motor switched off.
•Cleanthell-inareawell.
• Lay the saw on it’s side so that the fuel tank cap points up.
• Unscrew the tank cap.
4
3
2
19
18
18 SENCORE S8100 CUT-OFF SAW MANUAL

• To avoid contamination in the tank, use a screen funnel if possible.
• Fill the tank no farther than to the lower edge of the nozzle.
• Screw on the tank cap tightly again until the overturning protection clearly clicks”.
• After fueling up, clean any splashed operating medium from the power tool.
• Never start or operate the power tool at the site of fueling.
5.6 Adjusting The Ribbon Belt Tension
Generally, the ribbed belt tension must be set correctly
when starting the power tool. At initial starting, at re-
starting after extended stand still, after replacement of
the ribbed belt or after any other assembly work, always
check the tension and set the correct tension if required.
• Loosen both attachment nuts (a).
• Turn ribbed belt tensioning screw (13) towards the
right (clockwise).
 Increase ribbed belt tension.
The square nut (b) moves to the mark “+”.
• Turn ribbed belt tension screw (13) towards the left
(counter-clockwise):
 Reduce ribbed belt tension.
Thesquarenut(b)movestothemark“−”.
• The correct tension is reached when the square nut
(b)isonthecentermark(c),inbetween“+”and“−”.
• Tighten both attachment nuts (a) again.
5.7 Water Connection For Wet Cutting
Fine dust occurs when cutting mineral materials.
Recommendation: Use the water connection and cut
off wheels suitable for wet cutting when cutting mineral
materials.
When cutting with the water supply connected, the
dust is suppressed, visibility is improved and the cut off
wheel service life is increased by the cooling effect of
the water.
Before wet cutting:
• Connect suitable water line or suitable pressure tank
to the coupling connection (24).
• Operate the valve lever (28) to open or close the
water supply.
After wet cutting:
• Close the water supply, i.e. put the valve lever across
the connection piece.
• Let the cut off wheel run at high speed for another
approx. 30 seconds to completely eject the water.
Cleaning the screen lter insert in the coupling piece
(27):
 Chap. 8.2, page 8.
water supply opened
(valve lever parallel)
water supply closed
(valve lever across)
a
c
13
b
27
24 28
SENCORE S8100 CUT-OFF SAW MANUAL 19

5.8 Relocating cutting device from center position to outer position
Preparation
• Put the power tool on level ground.
• Remove the cut off wheel: Chap. 5.3, page 17
• Remove the water supply line (30):
Unscrew the attachment screw (a) of the water supply line on
the right and left sides of the wheel guard (2).
Remove both adapter pieces (b) including the line from the
wheel guard. Put down adapter pieces including line so that
the line does not interfere with the following work steps and
is not clamped.
• Remove handle for wheel guard adjustment (3). Loosen
both attachment screws (c) of the handle for wheel guard
adjustment and remove the handle.
• Loosen both attachment nuts (d) of the ribbed belt cover
(14).
• Turn ribbed belt tension screw (13) towards the left, e.g.
counter-clockwise, to reduce the ribbed belt tension.
Turn until the square nut (e) has been moved towards the
mark “−” (f) as far as possible. When installing the cutting
deviceinthecenterposition(cf.gure),thesquarenutisall
the way to the left; in case of installation in the outer position,
it is located all the way to the right.
• Remove both attachment nuts (d) entirely.
• Remove the ribbed belt cover (14).
Remove wheel guard (2)
• Carefully move the wheel guard towards the motor unit.
Thescrews(g)oftheassemblyange(j)aremovedwithin
the oblong holes.
• Once the wheel guard has been moved towards the motor
unit until the ribbed belt support (i) can be pulled through the
ribbed belt (h), remove the wheel guard. Observe that the
ribbed belt is not damaged by this.
When working with the cut off wheel in the outer position, observe the asymmetric weight distribution! If possible,
work in the center position.
The power tool is delivered for operation of the cut off wheel in the center position by default. Generally, the power tool
is more balanced in the center position, because the weight is distributed symmetrically to the center axis and the cut
therefore is easier to guide.
If obstacles are very close to the cutting location, it may be required to install the cutting device in the outer position so
that the cut off wheel is located farther towards the outside.
Loosenandturnassemblyange(j)
• Put the wheel guard on a level surface with the assembly
ange(j)pointingup(screws(g)oftheassemblyangepoint
up).
• Turn out screw (k).
Holdthenutbelowtheassemblyangewithatpliers.
•   Twist the assembly ange against the wheel guard so
that the receptacle bore for the screw (k) is located between
the center stop and the right stop (m) on the wheel guard.
Theassemblyangeishardtotwist.Securelyholdthewheel
guard when twisting.
2
d
f
3
c
h
c
30
a
14
13
e
g
i
14
30 3
b
a
d
j
m
2
k
g
20 SENCORE S8100 CUT-OFF SAW MANUAL