Murray 621501 31NB Series, Instruction Book

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ENGLISH
9
1740272
ASSEMBLY
Read and follow the assembly and adjustment
instructions for your snow thrower. All fasteners
are in the parts bag. Do not discard any parts or
material until the unit is assembled.
WARNING: Before doing any
assembly or maintenance to the
snow thrower, remove the wire
from the spark plug.
NOTE: In this instruction book, left and right
describe the location of a part from the oper-
ator’s position behind the unit.
NOTE: Torque is measured in foot pounds
(metric N.m). This measurement describes
how tight a nut or bolt must be. The torque is
measured with a torque wrench.
NOTE: Illustrations are located on page 2
and on pages 3 through 5.
Tools Required
1 Knife
How To Remove The Snow Thrower
From The Carton
1. Locate all parts that are packed separately
and remove from the carton.
2. Remove and discard the packing material
from around the snow thrower.
3. Cut down all four corners of the carton and
lay the side panels flat.
4. Hold onto the lower handle and pull the snow
thrower off the carton.
CAUTION: DO NOT back over cables.
5. Remove the packing material from the han-
dle assembly.
How To Assemble The Handle
1. Remove the packing material from the upper
and lower handles.
2. (Figure 2) Loosen the knobs (1) on each
side of the handle (2).
3. Raise the upper handle (2) to the operating
position.. Hold the upper handle (2) apart to
prevent scratching the lower handle.
NOTE: Make sure the cables are not
caught between the upper and lower han-
dle.
4. Tighten the knobs (1).
How To Prepare The Engine
WARNING: Follow the engine
manufacturer’s instructions for the
type of fuel and oil to use. Always
use a safety fuel container. Do not smoke
when adding the fuel mixture to the engine.
When inside an enclosure, do not fill the
fuel tank. Before you add the fuel mixture,
stop the engine. Let the engine cool for
several minutes.
See the engine manufacturer’s instructions for
the type of fuel and oil to use. Before you use
the unit, read the information on safety, opera-
tion, maintenance, and storage.
NOTE: Engine horsepower ratings may vary
by engine adjustments, manufacturing vari-
ances, altitude, atmospheric conditions, fuel
and maintenance.
How To Mix The Fuel Mixture
The two cycle engine, used on this snow throw-
er, requires a mixture of gasoline and oil for lu-
brication of the bearings and other moving parts.
The correct fuel mixture ratio is 50:1 (2.6 oz. oil
per one gallon of gas − see the Fuel Mixture
Chart). Gasoline and oil must be pre − mixed in a
clean gasoline container. Always use fresh,
clean, unleaded gasoline.
FUEL MIXTURE CHART (mixture 50:1)
U.S. IMPERIAL SI. (Metric
GAS OIL GAS OIL GAS OIL
1
Gal.
2.6
oz
1
Gal.
3.1
oz
1
liter
20
ML
Mix gasoline and oil as follows:
1. Pour one (1) U.S. quart of fresh, clean, un-
leaded automotive gasoline into a one gallon
size gasoline container.
2. Add 2.6 ounces of clean, high quality, two −
cycle oil to the gasoline container.
IMPORTANT: Do not use outboard motor
oil or multi − viscosity oils,such as 10W − 30
or 10W − 40.
3. Install the fuel cap onto the gasoline contain-
er. Vigorously shake the gasoline container
to mix the oil with the gasoline.
4. Add an additional three (3) U.S. quarts of
gasoline to the gallon container. Again shake
the gasoline container.
Before You Operate
Before you operate your new snow thrower,
please review the following checklist:
G
Make sure all assembly instructions have
been completed.
G
Make sure the discharge chute rotates freely.
G
Make sure that no loose parts remain in the
carton.
As you learn how to properly use the snow
thrower, pay extra attention to the following im-
portant items.
G
Make sure the fuel tank is filled with the
correct mixture of gasoline and oil.
G
Become familiar with the location of all
controls and understand their function.
G
Before starting the engine, make sure all
controls operate correctly.
Do not fill the fuel tank with gasoline that does not have oil mixed in it. Shake the
gasoline container before each filling of the fuel tank.
Shake Can
OIl
(2.6 oz )
Gasoline
1U.S.
Quart
1 U.S. Gallon container
1 U.S.
Gallon
Special
Gasoline
Add more gas
(3 U. S. Quarts)