712MT OPERATOR’S MANUAL 9/18/20 Page 8 of 16
FUEL SHUTOFF
THROTTLE
CHOKE
IGNITION
ENGINE START UP PROCEDURE
Only operate trencher outdoors and avoid breathing engine exhaust and fumes.
WARNING
: Engine exhaust contains carbon monoxide gas that is toxic. Breathing it can cause
unconsciousness and death. Avoid any areas or actions that expose you to carbon monoxide.
1.
Turn both IGNITION switches on. The switch located with the other trencher controls and the switch located on
the engine.
2.
Release the WHEEL DRIVE ENGAGE CONTROL.
3.
Open the FUEL SHUTOFF VALVE located below the choke on the engine.
4.
If the engine is cold, close the CHOKE. After engine starts, move the choke to half open. After about 30 seconds to
a minute, the choke can be opened completely. To restart a warm engine, leave the choke in the open position.
5.
Move the THROTTLE to about 1/3 of the way back. This increases throttle. It is located above choke.
6.
Pull start cord located on engine recoil.
When the engine starts, open the CHOKE (turn choke off) after the engine warms up enough.
COLD WEATHER OPERATIONS: Before operating in cold weather, refer to the Engine Owner’s Manual for
recommended engine oil. Do not spray starting fluid into the air cleaner as engine damage could result. If the machine
is operated at temperatures below +32°F (0°C) then changing the hydraulic fluid to ISO 46 is recommended. If you do
not want to change the hydraulic fluid but want to operate the machine at temperatures below +32°F (0°C), then do the
following:
•
Warm up engine at a low speed.
•
Gradually increase engine speed to half throttle, allowing
30 minutes
for the hydraulic fluid to warm up
.
Reduce the engine speed if the hydraulic pump whines. Pump noise may indicate a lack of hydraulic fluid flow that
could damage the pump. For frequent starts below 18°F consult your dealer or the factory.
