Operation; Fuel Requirements; Starting A Cold Engine - McCulloch MAC 250 B Instruction Manual

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. Contact an au-
thorised service dealer.
FUELING ENGINE
WARNING:
Remove fuel cap slowly
when refueling.
This engine is certified to operate on unleaded
petrol. Before operation, petrol must be mixed
with a good quality 2- -cycle air- -cooled engine oil
designed to be mixed at a ratio of 40:1. A 40:1
ratio is obtained by mixing 5 liters of unleaded
petrol with 0,125 liter of oil. DO NOT USE auto-
motive oil or marine oil. These oils will cause en-
gine damage. When mixing fuel, follow instruc-
tions printed on oil container. Once oil is added
to petrol, 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.
CAUTION:
Never use straight petrol in your
unit. This will cause permanent engine damage.

FUEL REQUIREMENTS

Use good quality unleaded petrol. The lowest
recommended octane grade is 90 (RON).
IMPORTANT
Use of alcohol blended fuels (more than 10% al-
cohol) can cause major engine performance
and durability problems.
WARNING:
Incorrect use of fuel and/
or lubricants will cause problems such as:
improper clutch engagements, overheat-
ing, vapor lock, power loss, lubrication defi-
ciency, deterioration of fuel lines, gaskets
and internal carburetor components, etc.
Alcohol blended fuels will cause a high ab-
sorption of moisture in the fuel/oil mixture,
causing the separation of oil and fuel.
HOW TO STOP YOUR UNIT
S To stop the engine, move the ON/STOP
switch to the STOP position.
ON/STOP
Switch
HOW TO START YOUR UNIT
WARNING:
Avoid any contact with the
muffler. A hot muffler can cause serious burns.

OPERATION

STARTING A COLD ENGINE (or a
warm engine after running out of fuel)
NOTE:
The throttle lock- -out is designed to
prevent unintentional use of the throttle trig-
ger. The lock- -out must be pressed with the
palm of your hand as you grip the throttle han-
dle before the trigger can be used.
1. Set unit on a flat surface.
2. Move ON/STOP switch to the ON position.
3. Slowly press the primer bulb 6 times.
4. Move choke lever to FULL CHOKE posi-
tion.
Primer Bulb
5. Set the throttle to the start position by first
pressing the throttle lock- -out and the
throttle trigger, then pressing the start
throttle button. Then release the throttle
lock- -out and the throttle trigger, followed
by the start throttle button. The throttle
function is now activated.
NOTE:
The start throttle button should stay
depressed, holding the throttle open. If not, re-
peat step 5. To return the engine to idle, press
the throttle lock- -out and throttle trigger again.
9
Starting position
Choke
Lever
Starter
Handle