Mixing Fuel
CAUTION!
Some gasolines contain alcohol
as an oxygenate! Oxygenated
fuels may cause increased oper-
ating temperatures. Under certain
conditions, alcohol-based fuels
may also reduce the lubricating
qualities of some mixing oils.
Never use any fuel contain-
ing 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 oper-
ate on a 50:1 mixture consisting of
unleaded gasoline and premium
2-cycle mixing oil only.
Starting the Engine
Starting a Cold Engine
IMPORTANT!
Engine ignition is controlled by a two-
position on-off switch mounted on the
throttle body. This switch is typically la-
beled "I" for START and "O" for STOP.
1. Slide the ignition switch to the "I"
(ON) position.
2. Prime the engine by repeatedly
pressing and releasing the carbure-
tor primer bulb until fuel can be seen
flowing through the transparent
overflow return tube.
3. Close the carburetor's choke by turn-
ing choke lever clockwise.
WARNING!
KEEP WELL CLEAR OF THE
TRIMMER HEAD–IT MAY ROTATE
WHEN THE ENGINE IS STARTED!
Place the trimmer on the ground
during starting.
Make sure you have secure foot-
ing and keep a firm grip on the
unit.
Keep bystanders and pets clear
when starting.
Never operate the trimmer unless
the trimmer head is installed!
8
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 gaso-
line/oil ratio.
Examples of 50:1 mixing quantities
1 gallon of gasoline to 2.6 oz.
mixing oil.
5 liters of gasoline to 100 ml.
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 STA-BIL™.
Starting a Warm Engine
When starting a warm engine, perform
steps one and two and make sure that
the choke lever is in the down position
(open the choke).
Ignition
Switch
22033
Figure 10
Filling the Fuel Tank
WARNING!
Minimize the Risk of Fire!
STOP engine before refueling.
ALWAYS allow the engine to cool
before refueling!
Wipe all spilled fuel and move the
engine at least 10 feet (3 meters)
from the fueling point and source
before restarting!
NEVER start or operate this
unit if there is a fuel leak.
NEVER start or operate this
unit if the carburetor, fuel lines,
fuel tank and/or fuel tank cap are
damaged.
NEVER smoke or light any fires
near the engine or fuel source!
NEVER place any flammable
material near the engine muffler!
NEVER operate the engine without
the muffler and spark arrester in
good working condition.
1. Place the trimmer on a flat, level
surface.
2. Clear any dirt or other debris from
around the fuel filler cap.
3. Remove the fuel cap, and fill the tank
with clean, fresh fuel.
4. Reinstall the fuel filler cap and tighten
firmly.
IMPORTANT!
The primer system only pushes fuel
through the carburetor. Repeatedly
pressing the primer bulb will not flood
the engine with fuel.
Ignition
Switch
Primer Bulb
Return Fuel
Line
Figure 11
Figure 12
Choke Lever