MK Diamond Products MK-X1318 Manual

08.2015
MK-X1318 Honda
Part# 171002
171016
MK-X1318
OWNER’S MANUAL,
OPERATING INSTRUCTIONS & PARTS LIST
www.mkdiamond.com
Caution: Read all safety and operating instructions
before using this equipment. This owner’s manual
MUST accompany the equipment at all times.
Revision 104
Manual Part# 171159
Gas Powered
Concrete Saw

2
INTRODUCTION
Congratulations on your purchase of a MK-X1318 Concrete Saw. We are certain that you will
be pleased with your purchase. MK Diamond takes pride in producing the nest construction
power tools and diamond blades in the industry.
Operated correctly, your MK-X1318 Concrete Saw should provide you with years of service.
In order to help you, we have included this manual. This owners manual contains information
necessary to operate and maintain your MK-X1318 Concrete Saw safely and correctly. Please
take the time to familiarize yourself with the MK-X1318 Concrete Saw by reading and reviewing
this manual.
Read and follow all safety, operating and maintenance instructions.
If you should have questions concerning your MK-X1318 Concrete Saw, please feel free to call
our friendly customer service department at: 800 421-5830
Regards,
MK Diamond
NOTE THIS INFORMATION FOR FUTURE USE:
MODEL NUMBER:
SERIAL NUMBER:
PURCHASE PLACE:
PURCHASE DATE:
NOTE: For your (1) one year warranty to be effective, complete the warranty card
(including the Serial Number) and mail it in as soon as possible.

3
TABLE OF CONTENTS
SAFETY
Safety Messages 4
Damage Prevention Message 4
General Safety Precautions and Hazard Symbols 5-7
California Proposition 65 Message 8
Prestart Safety 9
Safety Label Locations 10
Product Specications 11
UNPACKING, TRANSPORT and INSTALLATION
Unpacking 12
Contents 12
Transport 13
Installation 14-17
Fuel Tank 17
STARTUP, OPERATION and SHUTDOWN
Startup 18-19
Operation 20-22
Shutdown 22
Cleanup 23
MAINTENANCE AND TROUBLESHOOTING
Maintenance 24-32
Troubleshooting 33
EXPLODED VIEW & PARTS LIST
MK-X1318 Honda Engine 34-37
MK-X1318 Subaru Engine 38-41
THEORY
Theory Of Diamond Blades 42
ACCESSORIES ORDERING and RETURN INSTRUCTIONS
Accessories 43
Ordering Information 44
Return Material Policy 44
Packaging Instructions 44
Authorized Service Centers 45
Warranty 45

4
MK-X1318 SAFETY
Safety precautions should be followed at all times when operating this equipment. Failure to read and
understand the Safety Precaution and Operating Instructions could result in injury to yourself and
others.
This Operation Manual has been developed to provide complete instructions for the safe and efcient
operation of the MK-X1318 Concrete Saw.
Descriptions, illustrations, and photos are as accurate as possible at the time of publication. Photos
may include optional equipment or accessories and may not show all models covered by this manual.
SAFETY MESSAGE / ALERT SYMBOLS
A safety message alerts you to potential hazards that could hurt you or others. Each safety message is
preceded by a safety alert symbol ( ) and one of three words: DANGER, WARNING, or CAUTION.
DANGER
You WILL be KILLED or SERIOUSLY INJURED if you do not follow directions.
WARNING
You CAN be KILLED or SERIOUSLY INJURED if you do not follow directions.
CAUTION
You CAN be INJURED if you do not follow directions. It may also be used
to alert against unsafe practices.
NOTICE
You can cause PROPERTY DAMAGE to your machine if you don’t follow directions.
Each message tells you what the hazard is, what can happen, and what you can do to avoid or
reduce injury. Other important messages are preceded by the word NOTICE.
The safety labels should be periodically inspected and cleaned by the user to maintain good legibility
at a safe viewing distance. If the label is worn, damaged or illegible, it should be replaced. Contact
MK Diamond or your dealer for replacement.
Before using this saw, ensure that the person operating the equipment has read and understands all
instructions in this manual.
DAMAGE PREVENTION AND INFORMATION MESSAGES
A Damage Prevention Message is to inform the user of important information and/or instructions that
could lead to equipment or other property damage if not followed. Information messages convey
information that pertains to the equipment being used. Each message will be preceded by the word
note, as in the example below.
NOTE: Equipment and/or property damage may result if these instructions are not followed.

5
EXPLOSIVE FUEL!
Gasoline is extremely ammable, its vapors can explode if ignited; store only in approved
containers, in well-ventilated, unoccupied buildings and away from sparks or ames. Do not
ll the fuel tank while the engine is running or hot. Spilled fuel could ignite if it contacts hot
parts or sparks from ignition. Do not start the engine near spilled fuel. Never use gasoline
as a cleaning agent. Never operate the machine in an explosive atmosphere.
In order to prevent injury, keep guards in place and in working order at all times.
KEEP GUARDS IN PLACE
SAFETY PRECAUTIONS
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS
(
(
)
)
ENGINE OVER-SPEED
Never tamper with the governor components or settings to increase the maximum speed of
the machine. Severe personal injury and/or equipment damage could result if the equip-
ment is operated speeds above design maximum.
LETHAL EXHAUST GASES
Engine exhaust gasses contain poisonous carbon monoxide, an odorless colorless gas
that can cause death if inhaled. Avoid inhaling exhaust fumes, and never run the engine
in a closed building or conned area.
MK-X1318 SAFETY
In order to prevent injury, the following safety precautions and symbols should be followed
at all times!
GENERAL SAFETY
DO NOT operate or service this equipment before reading this entire manual.
This equipment should not be operated by persons under 18 years of age.
NEVER operate this equipment when not feeling well due to fatigue, illness or taking
medicine.
NEVER operate this equipment under the inuence of drugs or alcohol.
Whenever necessary, replace nameplate, operation and safety decals when they become
difcult to read.
ALWAYS store equipment properly when it is not being used. Equipment should be stored
in a clean, dry location out of the reach of children.

6
MK-X1318 SAFETY
KEEP CHILDREN AWAY
All visitors and children should be kept a safe distance from work area.
MAKE WORKSHOP KID PROOF
Make the workshops kid proof by using padlocks, master switches or by removing starter keys.
REMOVE ADJUSTING KEYS AND WRENCHES
Form a habit of checking to see that keys and adjusting wrenches are removed from the power tool
before it is turned on.
KEEP WORK AREA CLEAN
Cluttered work areas and benches invite accidents.
DO NOT USE IN DANGEROUS ENVIRONMENTS
Do not operate equipment in dangerous environments. Always keep the work area well lighted.
ALWAYS USE SAFETY GLASSES
Safety glasses should always be worn when working around power tools. Everyday eye-
glasses only have impact resistant lenses and may not prevent eye injury; they are NOT
safety glasses.
ALWAYS USE RESPIRATORY PROTECTION
Exhaust gases may be harmful if inhaled. Do not operate gas-powered equipment in
enclosed spaces. Respiratory protection should be worn when operating gas powered
equipment.
ALWAYS USE HEARING PROTECTION
To reduce the possibility of hearing loss, always use hearing protection when operating
equipment.
ROTATING OR MOVING PARTS
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never
operate a power tool with shrouds or guards removed.
HOT PARTS
Engine components can become extremely hot from operation. To prevent severe burns, do
not touch these areas while the engine is running, or immediately after it is turned off. Never
operate the engine with heat shields removed.
on
ACCIDENTAL STARTS
Before starting the engine, be sure the ON/OFF switch is in the “OFF” position to prevent
accidental starting. Place the ON/OFF switch in the OFF position before performing any
service operation.

7
DO NOT OVERREACH
Keep proper footing and balance at all times by not overreaching.
MAINTAIN TOOLS WITH CARE
Keep tools sharp and clean for the best and safest performance. Always follow maintenance instruc-
tions for lubricating and when changing accessories.
SHUTDOWN TOOL
The saw should always be shutdown before servicing or when changing accessories such as blades,
bits, cutters, etc...
USE RECOMMENDED ACCESSORIES
Consult the owner’s manual for recommended accessories. Using improper accessories may in-
crease the risk of personal or by-stander injury.
NEVER STAND ON THE TOOL
Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally contacted.
DO NOT FORCE THE TOOL
A power tool will do a job better and safer operating at the rate for which it was designed.
USE THE RIGHT TOOL
Do not force a tool or an attachment, to do a job that it was not designed to do.
WEAR PROPER APPAREL
Do not wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry that may be caught in
moving parts. Nonslip footwear is recommended. Wear protective hair covering to contain long hair.
SECURE WORK
Clamps or a vise should be used to hold work whenever practical. Keeping your hands free to oper-
ate a power tool is safer.
MK-X1318 SAFETY
NEVER LEAVE TOOL RUNNING UNATTENDED – TURN POWER OFF
Do not leave a tool until it comes to a complete stop. Always turn a power tool OFF when leaving the
work area, or, when a cut is nished.
CHECK FOR DAMAGED PARTS
Before using a power tool, check for damaged parts. A guard or any other part that is damaged
should be carefully checked to determine it would operate properly and perform its intended func-
tion. Always check moving parts for proper alignment or binding. Check for broken parts, mountings
and all other conditions that may affect the operation of the power tool. A guard or any damaged part
should be properly repaired or replaced.
DIRECTION OF FEED
Always feed work into a blade or cutter against the direction of rotation. A blade or cutter should al-
ways be installed such that rotation is in the direction of the arrow imprinted on the side of the blade
or cutter.

8
MK-X1318 SAFETY
CALIFORNIA PROPOSITION 65 MESSAGE
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities con-
tain chemicals known (to the State of California) to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:
• Lead, from lead-based paints
• Crystalline silica, from bricks and cement and other masonry products
• Arsenic and chromium, from chemically treated lumber
For further information, consult the following sources:
http://www.osha.gov/dsg/topics/silicacrystalline/index.html
http://www.cdc.gov/niosh/consilic.html
http://oehha.ca.gov/prop65/law/P65law72003.html
http://www.dir.ca.gov/Title8/sub4.html
Your risk from these exposures varies depending on how often you do this type of work. To reduce
your exposure to these chemicals, work in a well-ventilated area, and work with approved safety
equipment, such as those dust masks that are specially designed to lter out microscopic particles.
Grinding/cutting/drilling of masonry, concrete, metal and other materials with silica in their compo-
sition 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 inha-
lation 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 sub-
stance known to cause cancer. When cutting such materials, always follow respiratory precautions.
SILICA DUST WARNING

9
• NEVER disconnect any “emergency or safety devices”. These devices are intended for
operator safety. Disconnection of these devices can cause severe injury, bodily harm or
even death! Disconnection of any of these devices will void all warranties.
• Unauthorized equipment modications will void all warranties. Manufacturer does not
assume responsibility for any accident due to equipment modications.
• NEVER use accessories or attachments, which are not recommended by MK Diamond for
this equipment. Damage to the equipment and/or injury to user may result.
WARNING
DO NOT use woodcutting, or carbide blades on this machine! Use ONLY Diamond blades on machine.
Before starting the machine, ALWAYS check that all guards are in position and correctly tted. Check
the machine for loose bolts before starting.
Keep area around the machine clear of obstructions which could cause persons to fall onto moving parts.
ALWAYS ensure that the machine is on level ground before using. Know how to stop the machine
quickly in case of emergency. NEVER try to stop a moving blade with your hands.
MK-X1318 PRE-START

10
OPERATION & SAFETY DECALS
Part # 164202
A
B
D
F
C
E
G
I
J
H
L
K
M
N
WARNING
•Thisequipmentmayproducedustormistscontaining
 crystallinesilica.
•Silicaisabasiccomponentofmasonry,concrete,and
 othermaterials.
•Repeatedand/orsubstantialinhalationcancause
 seriousorfatalrespiratorydiseasesincludingsilicosis.
•RespirablecrystallinesilicaislistedbyCaliforniaand
 otherauthoritiesasasubstanceknowntocausecancer.
•Employdustcontrolsandprotectionper
 OSHA/NIOSH/MSHA.
!
Part # 155587 (3)
CAUTION
DO NOT
operate without
guards in place.
!
Part # 155588
Part # 154398
WARNING
In the event of blade
failure, replace
blade guard
immediately.
!
DO NOT operate
this equipment
before reading the
owner’s manual.
WARNING
!
Part # 155038
SERVICE OR
WARRANTY
FOR INFORMATION ON
PLEASE CALL
1-800-474-5594
Part # 170480
Part # 155585
CAUTION
Keep
hands and
feet clear.
!
Part # 154399
NOTICE
Overtensioning of belts will
result in premature crank
and/or bearing failure.
!
Part # 155582
Part # 171036
Part # 155579
CAUTION
DO NOT
touch hot
surface.
!
Part # 155578
CAUTION
Accidental start hazard.
Disconnect spark plug prior
to servicing.
!
Part # 155580
Part # 155581
WARNING
When refueling
stop engine and
allow to cool.
DO NOT
overll tank.
!
DANGER
The exhaust from this product con-
tains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
!
DANGER
Lethal exhaust
gases. Use only
in well ventilated
areas. DO NOT
use indoors.
WARNING
Always wear safety approved
hearing, eye, head and respi-
ratory protection
DO NOT operate this
equipment before reading
the owner’s manual.
Location Description
ALifting Bail Proposition 65, Dust Warning
BFrame/Front Read Manual
CShaft Cover/Belt Guard/Blade Guard Guards in Place
DBlade Guard Replace Blade Guard
EFrame/Back Service
FFrame/Front Hand & Feet Clear
GBelt Guard Overtensioning Belts
HGas Tank/Side Refueling
I Lifting Bail Hot Surface
JBelt Guard Accidental Start
KGas Tank/Side Exhaust/Cancer
LFrame/Back QR Code Manual
MGas Tank/Side Lethal Exhaust
NConsole Machinery Hazard
MK-X1318 SAFETY
The MK-X1318 Concrete Saw is equipped with a number of safety decals. These decals are provided
for operator safety and maintenance information. Should any of these operation or safety decals be-
come unreadable, replacements can be obtained by calling [phone].
A
L E I M K
C
HD
B
N
C
F
C
G
J

11
MK-X1318 PRODUCT SPECIFICATION
Blade
The MK-X1318 uses a 16 or 18 inch diameter diamond blade.
Concrete Saw Usage
The MK-X1318 is designed to cut various grades of concrete surfaces.
PRODUCT SPECIFICATIONS
The MK-X1318 is a versatile gas powered Concrete Saw. Operated and used according to this
manual, the MK-X1318 will provide years of dependable service.
General Description
The MK-X1318 is engineered as a portable concrete saw powered by a Honda or Subaru gas engine.
The saw is capable of 6-5/8” depth of cut with an 18” blade.
MotorandWeightSpecications
Motor and Weight specications for the MK-X1318 are listed below.
GeneralSpecications
Arbor Size 1” (25mm)
Blade Capacity 18” (45mm)
Depth of Cut 6-5/8” (168mm)
Weight 210 lbs. (95 kg)
L x W x H (inches) 38” x 24” x 40”
L x W x H (mm) 965 x 610 x 1,016
Engine Honda (Gas) Subaru (Gas)
Power GX390 EX-40
Part # 171002 171016
MK-X1318 Series Features
• One-piece box construction chassis made from 3/16” hot-rolled steel
• Powder-coated chassis resists peeling and corrosion
• Spring-loaded steel hinged blade guard for easy blade inspection
• Water distribution system uses “ride on the blade” water tubes that supply water to both
sides of blade
• 18” blade guard mounts on both left- or right-hand side of saw and cuts within 2” of wall or curb
• 30mm blade shaft supported by two heavy-duty, self-aligning pillow block bearings
• Depth control assembly engineered for smooth, controlled blade insertion
• Durable 8” x 2-1/4” non-slip rubber wheels with maintenance-free hubs & roller bearings
• Positive-locking depth control mechanism
• Includes built-in depth gauge, lifting bail and water tank
• One-year limited warranty

12
UNPACKING
MK-X1318
Saw
Blade Nut
Wrench
Engine Manual Warranty
Card
MK-X1318
Owner’s Manual
Pointer Water Tank Wheel Handle
MK-X1318 UNPACKING
11.2014
MK-1318
OWNER’S MANUAL &
OPERATING INSTRUCTIONS
www.mkdiamond.com
Caution: Read all safety and operating instructions
before using this equipment. This owner’s manual
MUST accompany the equipment at all times.
Revision 100
Manual Part#
Gas Powered
Concrete Saw
Your saw has been shipped from the factory thoroughly inspected. Only minimal assembly and
service is required. Check each, item, making certain all items are accounted for and in good visual
condition before discarding any packing materials. If there are any missing or damaged parts call MK
Diamond Customer Service at 800-421-5830.
CONTENTS
In the containers, you will nd one (1) MK-X1318 Saw, two (2) Blade Nut Wrenchs, one (1) Pointer,
one (1) Water Tank, one (1) Wheel Handle, one (1) MK-X1318 Owner’s Manual, one (1) Engine Own-
ers Manual, one (1) Warranty Card.
WARNING Never start engine until all initial servicing and set up steps are completed accord-
ing to this operations manual and engine manual. Read and familiarize yourself
with all controls and features of the saw before beginning operations.
Remove the saw from the pallet and place it on a at surface. Two people are required to lift saw.

13
TRANSPORT
MK-X1318 TRANSPORT
CAUTION
1. The MK-X1318 weighs approximately two hundred and ten (210 pounds), use
care when transporting.
2. Two people are required to lift and transport the MK-X1318.
3. A lifting bail is included.
1. The raise lever wheel raises the blade when rotated clockwise, and lowers the blade
when rotated counterclockwise.
2. The raise/lower wheel lock is engaged when the knob is tightened.
3. The throttle control increases engine rpm from slow (idle) in the back position, to fast
(full rpm) in the front position.
4. The water control lever is off in the vertical position and fully on in the
horizontal position. It may be placed at in between settings to regulate the water ow.
5. The choke is located on the engine, by the pull starter, for convenient cold starting.
6. Depth control indicator should be adjusted to zero when setting up saw.
7. The pointer should be checked for proper alignment with the blade after every use.
1
7
3
4
5
6
2

14
MK-X1318 INSTALLATION
Depth Control Wheel Handle
(A)
Align handle and shoulder bolt.
(B)
Tighten bolt with allen wrench.
Follow the assembly instructions to prepare your saw for operation.
(A)
Loosen bolts. Remove top
bolt. Rotate handlebars to the
upright position.
(B)
Align the handlebar with the
slots on both sides of the frame
at the desired height. Install bolt
through the Handlebar and into
the holes and tighten.
Handlebar Assembly

15
MK-X1318 INSTALLATION
Install Water Tank
Pointer Installation
(A)
Place water tank on top of lifting
bail. Slide water tank in position so
screws align with lifting bail slots.
(A)
Insert bolt through pointer bar
and then through pointer tab on
front of saw.
(B)
Tighten screws.
(B)
Tighten nut

16
MK-X1318 INSTALLATION
1. When installing the blade retaining-bolt, ensure the threads of the bolt are
aligned with the threads of the drive shaft so as not to “cross-thread” the bolt.
2. When installing the blade ensure that the blade shaft and anges are free from dirt
and all foreign material before mounting blade on the blade shaft. Tightening a blade
against an uneven surface can cause fracture or cause the blade to run out of alignment.
3. Blade shaft threads are left-handed on the right side of the saw and right-hand on the
left of the saw.
(A)
Use depth Control Wheel to
raise the saw.
NOTE:
Diamond Blade Installation
(C)
Loosen the Blade Shaft Nut while
holding the Shaft Wrench steady
on the ats of the blade shaft.
(D)
Remove the Blade Shaft Nut
and Outer Flange.
(E)
Install the Diamond Blade onto
the Blade Shaft. Ensure direc-
tional arrow on the blade indi-
cates proper rotational direction.
(F)
Install the Outer Flange. Verify the
drive pin is seated; it must project
through the hole in the blade and
into the ange.
(B)
Open the blade guard. Loosen
blade guard locking bolt. Re-
move blade guard.

17
MK-X1318 INSTALLATION
(G)
Install the Blade Shaft Nut.
(H)
Tighten Blade Shaft Nut holding
the Blade Shaft steady.
(I)
Attach Blade Guard ensuring
Blade Guard is secure over
spade. Tighten blade guard
locking nut.
WARNING
Do not operate the saw without the proper Blade Guard covering. Ensure that the blade exposure
does not exceed 180 degrees during operation.
Filling Fuel Tank
WARNING 1. Gasoline is highly ammable and explosive. You can be burned or seriously
injured when handling fuel.
2. To fuel, stop engine if running, and allow it to cool.
3. Refuel in a well-ventilated area.
4. Keep gasoline away from appliance pilot lights, barbeques, electric appliances,
power tools, etc.
5. Wipe up spills immediately. Do not start engine until spill is dry.
1. Fuel can damage paint and plastic. Be careful not to spill fuel when lling the
fuel tank. Damage caused by spilled fuel IS NOT covered under the warranty.
2. DO NOT use stale or contaminated gasoline, or an oil/gasoline mixture.
NOTE:
(A)
Remove the Fuel Cap. Refer to
Engine Manual for details.
(B)
Ensure fuel level is 1” below the
throat of the Fuel Tank.
1 inch (25mm)
from throat
Maximum
Fuel Level
(C)
Ensure fuel level is below the
top of the strainer lter.
Maximum
Fuel Level

18
MK-X1318 START UP
The pre-start inspection should be performed before beginning any job. If Diamond Blade is worn,
replace the blade before starting work.
Pre-Start Inspection
(A)
Inspect Blade for damage for
cracks. Verify the Blade is cor-
rect for the material being cut.
(C)
Inspect the saw for general dam-
age and/or loose hardware.
(B)
Inspect Engine for leaks.
(D)
Check for proper oil level.
Refer to Engine Manual for
details.
Low Level
Proper Oil Level
(G)
Check the Air Filter for
cleanliness. Refer to Engine
Manual for details.
(E)
Ensure fuel level is 1” below the
throat of the Fuel Tank.
1 inch (25mm)
from throat
Maximum
Fuel Level
(F)
Ensure fuel level is below the
top of the strainer lter.
Maximum
Fuel Level

19
1. Carbon monoxide gas is toxic, breathing it can cause unconsciousness
and/or death.
2. Avoid any areas or actions that expose you to carbon monoxide.
Engine Start
WARNING
(A)
Use the Depth Control Wheel to
raise the Blade clear of the oor.
Refer to Engine Manual for start-
ing procedure.
MK-X1318 STARTUP
Front Pointer Alignment
The pointer should be checked for proper alignment with the blade after every use.
(A)
Mark a 4 feet long straight line
on a smooth level surface. Place
Saw parallel to line; lower Blade
and center it over the line.
(B)
With the Blade parallel to the
line, lower the front Pointer as-
sembly and position the pointer
over the line.
(C)
Adjust the Pointer in or out if
the orange wheel is off the line
by loosening the bolt on the
end of pointer. Align orange
wheel with line.

20
MK-X1318 OPERATION
Adjusting Depth of Cut Gauge
(B)
Turn Crank Wheel until Blade
touches the ground.
(A)
Unlock Crank Wheel.
(C)
Set depth indicator to zero.
Standard Operation
The MK-X1318 is intended for industrial applications and operated by experienced professionals.
The operator must be aware of the machine’s capabilities and limitations. It is the operators respon-
sibility to use this machine under safe working conditions and conform with federal, state and local
codes or regulations pertaining to safety, air, pollution, noise etc...
(A)
Use the Depth Control Wheel to
raise the blade clear of the oor.
(B)
Attach the water hose to the
Cooling Inlet, if wet cutting.
(C)
Lower the Pointer, ensuring the
Pointer is aligned to the blade. See
“Front Pointer Alignment.”
Prior to operation of this machine the operator must determine the existence and
location of any subsurface features that may be hazardous or could damage the
equipment, (i.e. electric cable, natural gas line etc...)
CAUTION