11
EC7500.20
4. Loosen bolt with the wrench and
remove bolt and outer flange.
See Figure 8.
Figure 8
Outer
Flange Bolt
Tighten
Loosen
WARNING!
■When filling the fuel tank, make
sure the engine is stopped and
cool.
■Filling the fuel tank or mixing
fuel and oil must be done in a
place where there is no risk of
fire.
CAUTION!
Some gasolines contain alcohol as
an oxygenate! Oxygenated fuels
may cause increased operating
temperatures. Under certain
conditions, alcohol-based fuels may
also reduce the lubricating qualities
of some mixing oils. Never use any
fuel containing more than 10%
alcohol by volume! Generic oils and
some outboard motor oils may not
be intended for use in high-perfor-
mance air-cooled 2-cycle engines
and should never be used in your
Shindaiwa engine.
CAUTION!
This engine is designed to operate
on a 50:1 mixture consisting of
unleaded gasoline and premium 2-
cycle mixing oil only.
Filling the Fuel Tank
5. Place cut-off wheel so the inner
bore is properly set onto the collar.
WARNING!
Using an inappropriate cut-off
wheel may cause the wheel to
break and may result in serious
injury.
6. Replace outer flange and bolt, and
then, while holding hex wrench in
the hole in belt guard, tighten the
bolt with wrench.
7. Make sure the cut-off wheel is
securely fastened. Spin the wheel
to make sure it does not wobble.
■Use only fresh, clean unleaded
gasoline with a pump octane of 87
or higher.
■Mix all fuel with a premium 2-cycle
air-cooled mixing oil at a 50:1
gasoline/oil ratio.
Examples of 50:1 mixing quantities
■1 gallon gasoline to 2.6 oz. mixing oil.
■5 liters gasoline to 100ml mixing oil.
IMPORTANT!
Mix only enough fuel for your immedi-
ate needs. If fuel must be stored
longer than 30 days and oil with fuel
stabilizer is not used, it should first be
treated with a fuel stabilizer such as
StaBil™.
1. Use a container to pre-mix gasoline
and oil. Pour oil in first, then add
gasoline.
2. Remove the fuel filler cap by
turning counterclockwise.
3. Fill the tank with the mixed fuel,
then tighten the fuel filler cap
securely.
4. Any spilled fuel must be wiped up
completely. Make sure the unit has
no fuel leaks.
18
EC7500.30
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 differ-
ences in working conditions such as
atmospheric pressure or temperature,
or change in unit conditions after
more than 10 hours of use.
If you are unfamiliar with carbure-
tor adjustment techniques, ask your
dealer for advice.
Adjust the carburetor in accor-
dance with the following procedures.
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.
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.
Figure 22

Adjusting the Carburetor Adjusting Idle Speed

To adjust idle speed, turn the Idle
Adjust Screw with a screwdriver. See
Figure 22. Turn clockwise to increase
idle speed. Adjust idle speed so the
cut-off wheel does not rotate at idle.
Recommended idle speed:
2,200–2,600 min-1 (rpm)