9
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
Speed ................2,500 min-1 (rpm)**
Recommended Maximum Engine
Speed ............. 10,550 min-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 ............2 9.1 x 8.6 x 14.7 in.
(740 x 220 x 375mm)
EC7600 ............3 0.1 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/sec2
EC7600 ..............10.09/10.49m/sec2
Rear handle (idle/rated spindle)
EC7500 ................8.61/14.60m/sec2
EC7600 ................8.93/13.70m/sec2
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.
20
EC7500.47
EC7500.36
EC7500.35

Replacing the Drive Belt

1. Loosen the tension screw. Loosen

the two bolts on the belt guard and

remove the belt guard by sliding it

to the right. See Figure 26.

2. Loosen the two bolts in the clutch

cover and remove the clutch cover.

3. Replace the old belt with a new one.

Figure 26
Tension
Screw
Clutch
Cover Bolt
Belt Guard

4. Reassemble the clutch cover and

the belt guard and adjust the belt

tension. Figure 27 illustrates the

components.

Slide
forward to
remove
Figure 27

WARNING!

Never use a wheel which has

breakage, cracks or distortion.

The wheel may break while

operating and may result in

serious injury.

Always check the condition of the cut-

off wheel before starting the engine.

Make sure there are no breaks, cracks

or warps. See Figure 28.

A faulty wheel must be replaced

with a new one!

The tips of a diamond wheel should be

sharpened regularly to maintain

cutting efficiency. See page 22.

Figure 28
Cracks
Missing
Tips
Worn Tips
Distortion or Warps

Checking the Cut-off Wheel