Weed Eater MX550 - Manual (Page 4)

4
OPERATION
KNOW YOUR TRIMMER
READ THIS INSTRUCTION MANUAL AND SAFETY RULES BEFORE OPERATING YOUR UNIT.
Compare the illustrations with your unit to familiarize yourself with the location of the various controls
and adjustments. Save this manual for future reference.
Primer Bulb
Line Limiter Blade
Fuel Mix Fill Cap
Assist Handle
Starter Handle
STOP
Switch
Throttle Trigger
Choke Lever
Spark Plug
Shield
Trimmer
Head
Shaft
Muffler
Shaft Mark or Arrow Safety Label
STOP SWITCH
The STOP switch is used to stop the engine. To
stop the engine, push and hold the switch in the
STOP position until the engine stops.
PRIMER BULB
The PRIMER BULB removes air from the car-
buretor and fuel lines and fills them with fuel.
This allows you to start the engine with fewer
pulls on the starter rope. Activate the primer
bulb by pressing it and allowing it to return to
its original form.
CHOKE
The CHOKE helps to supply fuel to the engine
to aid in cold starting. Activate the choke by
moving the choke lever to the FULL CHOKE
position. After the engine attempts to start, move
the choke lever to the HALF CHOKE position.
Once engine has started, move the choke lever
to the RUN position.
BEFORE STARTING ENGINE
WARNING: Be sure to read the fuel
information in the safety rules before you be-
gin. If you do not understand the safety rules,
do not attempt to fuel your unit. Call
1-800-554--6723.
FUELING ENGINE
WARNING:
Remove fuel cap slowly
when refueling.
HELPFUL TIP
To obtain the correct oil mix
ratio, pour 3.2 ounces of
2--cycle synthetic oil into
one gallon of fresh gas.
This engine is certified to operate on unleaded
gasoline. Before operation, gasoline must be
mixed with a good quality synthetic 2-cycle
air-cooled engine oil designed to be mixed at a
ratio of 40:1. Poulan/WEED EATER brand
synthetic oil is recommended. Mix gasoline and
oil at a ratio of 40:1. A 40:1 ratio is obtained by
mixing 3.2 ounces (95 ml) of oil with 1 gallon (4
liters) of unleaded gasoline. DO NOT USE
automotive oil or marine oil. These oils will
cause engine damage. When mixing fuel, follow
instructions printed on container. Once oil is
added to gasoline, shake container momentarily
to assure that the fuel is thoroughly mixed.
Always read and follow the safety rules relating
to fuel before fueling your unit.
IMPORTANT
Experience indicates that alcohol blended fuels
(called gasohol or using ethanol or methanol)
can attract moisture which leads to separa-
tion and formation of acids during storage.
Acidic gas can damage the fuel system of an
engine while in storage. To avoid engine
problems, empty the fuel system before stor-
age for 30 days or longer. Drain the gas tank,
start the engine and let it run until the fuel lines
and carburetor are empty. Use fresh fuel next
season. Never use engine or carburetor
cleaner products in the fuel tank or permanent
damage may occur. See the STORAGE sec-
tion for additional information.
HELPFUL TIP
If your engine switch reads
“push to stop”, it is always
in the ON position.