OPERATING THE ENGINE
COLD WEATHER STARTING -Continued
NOTE: In cold weather the starting motor may
disengage prematurely. This is caused by the engine
firing once but failing to continue running. If this
happens several times, the engine will be flooded
and it will be necessary to start as described in Step5.
3.
Press the clutch-brake pedal all the way downand
be sure the power take-off switch is in the off
position. The safety interlocks will prevent starting
unless this is done.
4.
Move the key switch into the start position and
hold until the engine starts. As soon as the engine
starts, slowly push the choke in part way.
5. Leave the throttle in the slow position but push
the choke in all the way; then turn the ignition key
to the start position and slowly pull the choke out
to the position which will cause the engine to start
and continue running. If the engine falters after
shifting into drive, pull the choke out part way
until the engine runs smoothly, then gradually
push the choke back in as the engine warms.
CAUTION! During operation do not run
the engine in confined area such as
storage building any longer than is
necessary for immediate moving of the tractor
outside into the air.
FUEL SYSTEM
CARBURETOR ADJUSTMENTS
NOTE: Air cleaner has been removed from
illustrations in order to show carburetor.
A CAUTION! To avoid injury or an
accident, be sure the brake pedal is in
the locked position, transmission is in
neutral, and the mower is disengaged before
adjusting the carburetor.
This engine is designed to operate on leaded
gasoline with a 93 minimum octane rating or on
unleaded gasoline with a 91 minimum octane
rating (Research Method).
The use of unleaded gasoline will increase spark
plug and valve life, maintain engine performance
longer, and reduce rust and corrosion of the engine
while stored.
The fuel tank filler cap has an air vent. Keep the
vent open at all times to assure proper flow of thefuel.
A CAUTION! Do not remove the fuel tank
cap or fill the fuel tank when the engine
is running, hot, or when near an openflame.
Do not smoke when working around
flammable fuel, as the air around the tractor is
mixed with a highly explosive vapor.
The carburetor is adjusted at the factory and under
normal operating conditions it will not require
readjusting. However, if the engine does not
operate properly, installation of a new air cleaner is
recommended.
FUEL SHUT-OFF VALVE
Be sure the shut-off valve under the fuel tank is
open. Pullout the needle stem (shut-off valve)
until the seat on the stem is tight against the stop
to prevent leakage or seepage when the valve is in
its full-open position.
NOTE: To prevent possible damage to the
carburetor needles, be very careful closing the
carburetor needles before basic adjustments are
made. I mproper adjustment of the carburetor may
result in engine damage.
9
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