Shindaiwa EC7600, EC7500 User Manual

SHINDAIWA OWNER’S AND
OPERATOR’S MANUAL

EC7500/EC7600
ENGINE CUTOFF
SAW

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(EPA VERSION)

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WARNING!

■ Read this manual and familiarize yourself with its contents.

■ This unit is designed primarily for cutting construction materials and metal

according to the type of cutting wheel installed.

■ To minimize the risk of injury to yourself and others, always wear hearing
protection, a dustproof mask, goggles and a helmet when operating this unit.

■ Keep this manual handy so you can refer to it when required.

Part Number 68002-94310 Rev. 12/02

Contents

Page

Attention Statements............................ 2

Labels and Symbols ............................. 2

Safety Precautions ................................ 3

Safety/Operation Information Labels ... 7

Unit Description ................................... 8

Technical Specifications ......................9

Assembly ............................................. 10

Filling the Fuel Tank ......................... 11

Starting/Stopping the Engine........... 12

Operation ............................................. 14

Inspection and Maintenance ............. 16

Long Term Storage ............................ 23

Troubleshooting .................................24

Emission Warranty Statement ..........25

Shindaiwa Inc. reserves the right to make
changes to products without prior notice, and
without obligation to make alterations to units
previously manufactured.

Labels and Symbols

The following are symbols that appear
on the unit.

Read and follow the
operator’s manual. Failure
to do so could result in
serious injury.

Always wear hearing
protection, a dustproof
mask, goggles and a
helmet when operating
this unit.

Fuel Filler

Choke

Attention Statements

Throughout this manual are special
“attention statements”.

WARNING!

A statement preceded by the word
“WARNING” contains information
that should be acted upon to
prevent serious injury.

CAUTION!

A statement preceded by the word
“CAUTION” contains information
that should be acted upon to
prevent unit damage.

IMPORTANT!

A statement preceded by the word
“IMPORTANT” is one that possesses
special significance.

NOTE:

A statement preceded by the word
“NOTE” contains information that is
handy to know and may make your
job easier.

The following symbols are meant to
provide important reminders.

Be aware of kickback!

Kickback may force the
cutting-off wheel up and
back toward the operator
with a lightning-fast
reaction. Kickback can
occur whenever the upper­half of the cutting-off wheel
touches an object while
operating the unit.

Be aware of thrown
objects!

WARNING!

Using this cut-off saw, or any
other high-speed power tool, can
be hazardous. As a result, you
must employ special safety
precautions to reduce the risk of
injury or fire.

2

Safety Precautions

WARNING!

Before Operation

■ Children and people who do not
understand this manual must
not use this unit.

■ Never allow other people or
animals to be near the unit
when starting or operating.

■ Never touch a rotating cut-off
wheel.

■ Operate the unit only in a well
ventilated area.

■ Never operate the unit in a
closed area such as a room,
warehouse or tunnel. Running
the unit in a closed area may
cause serious illness or even
death due to exhaust gas.

■ Never allow any people or
animals near exhaust gas.

■ Never inhale exhaust gas.

■ Never make unauthorized

modifications or alterations to
any of the components of the
unit, and never operate the unit
without the wheel guard or
muffler.

■ This unit is designed for one­man operation and must be
operated by only one person.

■ Never operate the unit when
you are tired or under influence
of any substance that could
impair vision, dexterity or
judgement.

■ When operating the unit, always
wear snug-fitting clothing, safety
gloves, safety non-skid footwear,
hearing protection, a dust-proof
mask, a helmet and goggles.
Never wear floppy clothing,
shorts, sandals or accessories
that could become entangled.

■ To minimize the risk of sparks
igniting clothing while operating
the unit, wear clothing made of
leather, wool, tightly-woven
cotton, or cotton treated with
flame-retardant.

■ Never use any cut-off wheel that
is not recommended in this
manual.

■ Do not start or operate the unit
unless you have a clear work area
and secure footing.

■ Never smoke or use fire near the
unit or its fuel.

■ Since the muffler and exhaust gas
become very hot, make sure there
are no flammable substances
near the unit.

■ Never run the unit if you discover
a fuel leak.

■ A first-time operator should obtain
practical instruction from a dealer
or an experienced user before
using the unit.

■ Make sure all the components are
in place and the bolts are securely
fastened.

■ Make sure the cut-off wheel is
securely fastened and is not
damaged. Never use a cut-off
wheel with cracks, distortion, or
one that is unbalanced.

■ Make sure the belt tension is
properly adjusted and the wheel
guard, belt guard and clutch cover
are securely assembled.

■ Always inspect the front handle,
rear handle and wheel guard
before use, and never use the unit
if the parts are damaged.

3

Safety Precautions (continued)

WARNING!

Before Operation (continued)

■ Before cutting into a material,
familiarize yourself with the
risks associated with dust,
fumes, or mists that may be
generated during operation.

Make sure you provide
adequate protection against
harmful emissions. A high-

performance respirator and/or
water attachment may be
required.

Fueling the Unit

■ Mixing fuel and engine fueling
must be done outside, and
where no other combustibles
are nearby.

■ Do not use the cut-off saw to cut
or disturb asbestos or products
containing or wrapped in asbes­tos. If you believe you might be
cutting asbestos, contact your
supervisor.

■ Open the fuel cap slowly to
release any possible build-up of
pressure.

■ Never refuel when the unit is hot.
Allow to cool before refueling.

■ Never fuel when the engine is
running.

■ After fueling, wipe all spilled fuel.
Cutting metal may cause sparks
from the cut-off wheel and may
ignite spilled fuel which could
result in serious injury.

Figure 1. Start the engine at least 10 feet

(3 meters) from a fueling location.

Starting The Engine

■ Start the engine at least 10 feet
(3m) away from a fueling
location.

■ When starting the engine,
make sure the cut-off wheel
does not touch any object or
ground. As soon as the engine
starts, the cut-off wheel may
begin to rotate.

4

■ Start the engine according to the
instructions in this manual. Start
the engine on a firm, stable
surface. Make sure the area is
clear of bystanders. Starting the

engine must be done by only
one person without any
assistance.

■ The cut-off wheel should not
rotate at engine idle. If it does,
reduce idle speed.

■ Never leave the unit running
unattended.

Safety Precautions (continued)

WARNING!

Kickback

■ Kickback may force the cut-off
wheel up and back toward the
operator lightning-fast.

■ Kickback can occur whenever
the upper half of the cut-off
wheel touches an object. Never
cut an object using the upper
half of the cut-off wheel.

Figure 2. Always be aware of, and

prepared for, kickback.

Operation

■ The unit must be held firmly
with both hands, one hand on
the rear handle, the other on
the front handle. Never hold
onto any other part of the unit.

Figure 3. Always operate

below chest level.

EC7500.17

■ This unit must be operated
below chest level. Operating
above chest level may result in
serious injury.

■ When cutting vertically, the unit
should be positioned horizon­tally or with the wheel side tilted
slightly down. When cutting
horizontally, the recoil starter­side should face up.

■ Never impact or apply pressure
to the sides of the cut-off wheel
for any reason.

■ Maintain firm and stable footing
during operation. Do not over­reach.

■ When working in a group, make
sure operators are least 30 feet
(10 meters) away from each
other.

■ If you drop the unit or strike it
against a hard surface, stop the
engine immediately and inspect
for damage. If you discover
damage, have it repaired before
you return the unit to service.

■ Check the fuel filler cap regularly
during operation to make sure it
remains securely tightened.

EC7500.14

5

Safety Precautions (continued)

WARNING!

Operation (continued)

■ If you discover fuel leakage,
immediately stop the engine.

■ Cutting may cause sparks from
the cut-off wheel. Make sure
there is no flammable sub­stances nearby.

■ Never cut live electrical wires.
The shock you might receive
could be very serious.

■ Do not touch hot parts such as
the muffler or cylinder. You
could burn yourself severely.

■ The cut-off wheel gets hot while
cutting. Never touch the wheel
immediately after cutting. You
could burn yourself severely.

■ While the engine is running,
never touch high voltage parts
such as the spark plug cap and
plug cord.

Stopping The Engine

■ The cut-off wheel coasts for a
while after the engine is
stopped. Keep hold of the unit
firmly until the wheel stops
completely and then place it on
the ground.

Inspection and Maintenance

■ Before performing any inspection,
maintenance, repair or cleaning
of the unit, make sure engine and
cut-off wheel are completely
stopped and cooled down.

■ Inspection and maintenance
operations should be done in a
well ventilated location and where
there are no combustibles
nearby.

■ When replacing parts, always use
Shindaiwa genuine parts. Using
non-Shindaiwa genuine parts
may result in serious injury.

■ Inspection and maintenance
operations not mentioned in this
manual should be performed by
an authorized Shindaiwa dealer.

Transport and Storage

■ When carrying the unit, make
sure engine and cut-off wheel are
completely stopped.

■ Carry the unit with the front
handle and with cut-off wheel
facing rearward.

■ When storing the unit, make sure
the cut-off wheel is removed and
the unit is placed on a secure, dry
place.

■ Keep the unit away from children.

■ When storing the unit for more

than a few days, empty the fuel
tank completely.

■ Store gasoline and mixed fuel in
a closed, dry place and where
combustibles are not nearby.

6

Safety and Operation Information Labels

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Wear eye,
hearing, and
breathing
protection

Read the
operator’s
manual

IMPORTANT!

● Clean and inspect the filter
at least once a day.

● Make sure the filter
screw is tight.

● Use only 2-cycle
mixed fuel.

GASOLINE TO FUEL
OIL RATIO—50:1

ENGINE START PROCEDURES

1.Press PRIMER bulb 4–5 times,
or until fuel is in the bulb.

2.COLD ENGINE: Pull the CHOKE
knob OUT.
WARM ENGINE: Pull the CHOKE
knob once, then press it back IN.

3.Press the DECOMPRESSION
valve IN.

4.Place OFF/ON switch to “ON”.

5.Pull the recoil starter until you
hear first firing.

6.Make sure the CHOKE knob is
pressed IN.

7.Make sure the DECOMPRESSION
valve is pressed IN.

8.Pull the recoil starter.

9.Once the engine starts, pull back
the throttle lever slightly to idle
(the CHOKE knob will
automatically go back IN).

Be aware of
kickback!

Be aware of
thrown objects!

IMPORTANT!

Make sure all safety and operation
information labels are undamaged
and readable. Immediately replace
damaged or missing safety and
operation information labels, which
are available from your authorized
Shindaiwa dealer.

DECOMPRESSION

VALVE

T

PRIMER

USE ONLY GENUINE

SHINDAIWA BLADES

No performance guarantee without

using genuine Shindaiwa blades

No-load revolution speed: 4220 min-1 (rpm)

Use reinforced abrasive blades with

maximum useable perimeter velocity of:

15,749 ft/min.(4800 m/min.)

Max. blade diameter: 12" (305mm)
Max. blade thickness: 0.157" (4.0mm)

EC7500

Standard arbor: 0.86" (22mm),
others available; see owner’s manual

USE ONLY GENUINE

SHINDAIWA BLADES

No performance guarantee without

using genuine Shindaiwa blades

No-load revolution speed: 3680 min

Use reinforced abrasive blades with

maximum useable perimeter velocity of:

15,749 ft/min.(4800 m/min.)

Max. blade diameter: 14" (355mm)
Max. blade thickness: 0.177" (4.5mm)

EC7600

Standard arbor: 0.86" (22mm),
others available; see owner’s manual

TURN THE KNOB ALL
THE WAY TO FREE
OR LOCK THE GUARD

-1

(rpm)

FREE LOCK

EC7500.18

BELT

DIRECTION

Figure 4

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OFF

EC7500.1

7

Unit Description

Carburetor Idle

Adjustment Screw

Choke

Rear

Handle

Primer

Pump

Air Cleaner

Cover

Clutch Cover

Front

Handle

Muffler

Decompression

Valve

EC7500.18

Wheel Guard

Recoil

Starter

Belt Guard

Lock Knob

Cut-off Wheel

Figure 5

8

Cylinder

Cover

EC7500.1A

Fuel Filler

Cap

ON/OFF

Switch

Throttle
Trigger

Lockout

Throttle

Trigger

Technical Specifications

Engine Type ...........................2-Cycle,

vertical-cylinder, air-cooled

Displacement ....... 4.5 cu. in.

(73.5cc)*

Bore x Stroke ..2 x 1.4 in. (51 x 36mm)
Max. Power Output** .. 4.5 hp (3.3kW)
Recommended Engine Idling

-1

Speed ................2,500 min

Recommended Maximum Engine

Speed ............. 10,550 min

(rpm)**

-1

(rpm)**

Maximum Cutting Depth, EC7500

Abrasive Wheel

12 in. (305mm)...........4 in. (102mm)

Diamond Wheel

12.5 in. (320mm).... 4.4 in. (109mm)

Maximum Cutting Depth, EC7600

Abrasive Wheel

13.9 in. (355mm)........5 in. (127mm)

Diamond Wheel

14.1 in. (360mm).... 5.1 in. (129mm)

Rated Spindle Speed†

EC7500 ............... 3,800 min

-1

(rpm)

EC7600 ................ 3,320 min-1 (rpm)

Maximum Spindle Speed†

EC7500 ................ 4,220 min

-1

(rpm)

EC7600 ............... 3,680 min-1 (rpm)

Maximum Peripheral Wheel Speed†

EC7500.... 13,300 ft/min. (67.5m/sec)

EC7600.... 13,500 ft/min. (68.0m/sec)

Speed Reduction Ratio

EC7500 .................................. 2.50:1

EC7600 .................................. 2.87:1

Type of Fuel...........Unleaded gasoline

plus 2-cycle engine oil (50:1)

Fuel Tank Capacity................... 800ml

Carburetor Type................ Diaphragm

Ignition System ................... Electronic

Spark Plug ................Champion, CJ6Y

Engine Starting/Stopping ..................

Toggle switch, recoil starter

Power Transmission .......... Automatic

centrifugal clutch, V-ribbed belt

Anti-Vibration System ............. Unified

handles with 7-point support

Safety Devices ......... Throttle lock-out,

wheel guard

Dry Weight (without wheel)

EC7500 ....................22 lbs (10.0kg)

EC7600 ....................23 lbs (10.5kg)

Dimensions (L x W x H)

EC7500 ............ 29.1 x 8.6 x 14.7 in.

(740 x 220 x 375mm)

EC7600 ............ 30.1 x 8.6 x 15.3 in.

(765 x 220 x 390mm)

Sound Pressure Level†

EC7500 ...........................101 dB (A)

EC7600 ...........................101 dB (A)

Sound Power Level††

EC7500 ...........................108 dB (A)

EC7600 ...........................111 dB (A)

Vibration Level§

Front handle (idle/rated spindle)

EC7500 .................. 6.96/5.48m/sec

EC7600 ..............10.09/10.49m/sec

Rear handle (idle/rated spindle)

EC7500 ................ 8.61/14.60m/sec

EC7600 ................ 8.93/13.70m/sec

Recommended Cut-off Wheels

EC7500, abrasive ..... 12 in. (305mm) dia

EC7500, diamond .. 12.5 in. (320mm) dia
EC7600, abrasive .. 13.9 in. (355mm) dia

EC7600, diamond .. 14.2 in. (360mm) dia

Arbor Sizes..................... 0.78" (20mm),

0.86" (22mm), and 1.0" (25.4mm)

* Measured in accordance with EN ISO 11201:

1995.
** Measured in accordance with ISO 7293: 1983.
† Measured with 305mm wheel (EC7500) and

355mm wheel (EC7600).

†† Measured in accordance with EN ISO 3744:

1995.

§ Measured in accordance with EN 28662-1:

1992.

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