Shindaiwa EC7500 Manuel D'utilisation page 14

Inspection and Maintenance (continued)
Adjusting the Carburetor
It is not necessary to adjust the carburetor
when the unit is new. Adjust the carburetor
only when you are sure it is necessary due
to differences in working conditions such
as atmospheric pressure or temperature, or
change in unit conditions after more than
10 hours of use.
Adjusting Idle Speed
To adjust idle speed, turn the Idle Adjust
Screw with a screwdriver. See Figure 23.
Turn clockwise to increase idle speed.
Adjust idle speed so the cut-off wheel does
not rotate at idle.
1. Recommended idle speed: 2,200–2,600
min -1 (rpm)
Spark Plug Maintenance
If the engine becomes hard to start or if
idle speed is unstable, inspect the spark
plug according to the following procedures.
1. Remove the spark plug. Remove the
spark plug. See the section "If the
Engine Does Not Start... "
2. Clean the electrode with a wire brush. If
necessary, adjust the electrode gap. The
gap should be 0.6mm. See Figure 24.
Cleaning Cylinder Fins
Dust and debris may accumulate between
the cylinder fins and can lead to engine
overheating. In order to maintain efficient
service, cylinder fins should be cleaned
once every month.
Checking the Drive Belt
The transmission belt tends to loosen
and wear after a period of operation and
should be checked and adjusted regularly
according the following procedures. If the
belt is worn, torn, cracked, scratched or
otherwise damaged, replace it with a new
one immediately.
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WARNING!
When adjusting the carburetor,
keep bystanders well away, and make
sure the cut-off wheel is clear of any
interference because the wheel may
rotate during carburetor adjustment.
Figure 23
Figure 24
WARNING!
Before cleaning cylinder
fins, make sure the engine is cold.
If you are unfamiliar with carburetor
adjustment techniques, ask your dealer
for advice.
Adjust the carburetor in accordance with
the following procedure.
1. Prior to adjusting, clean the air filter as
described on the previous page and then
run the engine for a few of minutes at idle
speed to warm up the engine.
High and Low Speed Needle
The high and low speed needle is fixed
and cannot be adjusted.
0.6mm