Quadivator ST50 Assembly/Operators/Parts Manual page 11

.4 Adjust the collector housing height of the ST50 Snow Thrower to clear
gravel or crushed rock surface that is being cleaned.
.5 Never attempt to make adjustments to the ST50 Snow Thrower while the
engine (motor) is running!!
.6 Let engine (motor) and machine adjust to outdoor temperatures before
starting clear snow.
.7 Always wear safety glasses or eye shields during operation or while
performing an adjustment or repair to protect eyes from foreign objects that
may be thrown from the machine.
.3 General Device Operation – ST50 Snow Thrower
.1 Do not put hands or feet near or under rotating parts. Keep clear of the
discharge opening at all times.
.2 Exercise extreme caution when operating on or crossing gravel drives,
walks or roads. Stay alert for hidden hazards or traffic – NEVER carry
passengers.
.3 After striking a foreign object, stop the engine (motor) remove the wire
from the spark plug, thoroughly inspect the snow thrower for any damage,
and repair damage before restarting and operating the snow thrower.
.4 If the unit should start to vibrate abnormally, stop the engine (motor) and
check immediately for the cause. Vibration is generally a warning of trouble
with the snow thrower.
.5 Stop the engine (motor) whenever you leave the operating position,
before unclogging the collector/impeller housing or discharge guide, and
when making any repairs, adjustments or inspections.
.6 Take all possible precautions when leaving the machine unattended.
Disengage the drive, lower the attachment, set the parking brake, stop the
engine and remove the key.
.7 When cleaning, repairing or inspecting, make certain the
collector/impeller and all moving parts have stopped. Disconnect the spark
plug wire and keep the wire away from the plug to prevent accidental
starting.
.8 Do not run the engine indoors, except when starting the engine and for
transporting the snow thrower in or out of the building. Open the outside
doors: exhaust fumes are dangerous.