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2. Turn the key to start the engine. The engine may continue cranking
for up to 15 seconds or until the vehicle starts.
Note:If the engine does not start on the first try, wait for a short period
of time and try again.
If you have difficulty starting the engine when the temperature is below
-13°F (-25°C), press the accelerator pedal slightly and try again.
If the engine does not start after three attempts, wait 10 seconds and
follow this flooded engine procedure.
1. Select positionPorN.
2. Fully press the accelerator pedal and hold it there.
3. Fully press the brake pedal.
4. Start the engine.
Guarding Against Exhaust Fumes
WARNING:If you smell exhaust fumes inside your vehicle, have
this checked immediately. Do not drive your vehicle if you smell
exhaust fumes. Carbon monoxide is present in exhaust fumes. Take
precautions to avoid its dangerous effects.
Important Ventilating Information
If you stop your vehicle and leave the engine idling for long periods of
time, we recommend that you do one of the following:
•Open the windows at least 1 inch (2.5 centimeters).
•Set your climate control to outside air.
104Starting and Stopping the Engine
2013 F-650/750(f67)
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USA(fus)
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STARTING A DIESEL ENGINE
WARNING:Operation of a diesel engine near flammable vapors
in the air may cause the engine speed to increase uncontrollably
and over speed. If this situation occurs, mechanical damage, fire,
explosion, personal injury or death could result.Turning off the
ignition key does not slow or stop the engine due to uncontrollable
fueling of the engine through flammable vapors being drawn into
the engine air inlet.Operation of components such as starter,
alternator, electric motors, etc. and static electricity could also ignite
flammable vapors.
Do not operate the truck in the possible presence of flammable vapors
unless both a complete hazard analysis is performed and necessary
additional safety processes and/or equipment such as vapor testing, air
intake shutoff devices, ventilation, etc. are utilized. The operator is
responsible for using those processes and/or equipment to ensure that
the diesel engine and all other components on the truck can be
operated safely under the specific conditions and hazards that may be
encountered.
WARNING:If equipped with an air intake heater, DO NOT use
ether or any other starting fluids. The use of starting fluids
(ether) in an engine equipped with an air intake heater could cause an
explosion and result in property damage and/or personal injury.
Switch the ignition on and wait until the glow plug indicator
goes off.
Note:You can only operate the starter for a maximum of 30 seconds at
a time. Allow two minutes before cranking the starter again.
Note:On some engines, the glow plug indicator illuminates after the
engine starts. Allow the engine to idle about three minutes, or until the
engine coolant temperature gauge begins to rise. Maintain idle speed
until the glow plug indicator goes off. Operating the engine at higher
speeds reduces the effectiveness of the air inlet heater.
Note:When starting a cold engine, increase the engine RPM slowly to
make sure adequate lubrication is available to the bearings.
Starting and Stopping the Engine105
2013 F-650/750(f67)
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USA(fus)
Page 122 of 378

Continued driving without refilling results in the following actions as
required by the U.S. Environmental Protection Agency (EPA):
Low DEF Level Warning Indications and Vehicle Consequences
DEF Tank LevelIndicator
LampsConsequence Remedy
Above initial
warning threshold
(Over 20% full).None. None. None.
Initial warning
threshold (20% full).DEF solid
None.
Add 1 gallon
(3.8L) DEF to
5 gallon (19.0L)
tank or 2 gallons
(7.6L) DEF to
10 gallon
(34.0L) tank. Critical warning
threshold (15% full).DEF
blinking
None.
First vehicle
consequence (12.5%
full).DEF
blinking
/
Amber engine
solid25% torque
reduction.
Second vehicle
consequence
(Empty). System
cannot maintain
DEF pressure.DEF
blinking
/
Amber engine
solid
Torque
reduction
increases
from 25% to
40% at rate of
1% each
minute.
Final vehicle
consequence
(Empty) and engine
intentionally shut
down (key off), in
extended idle for
one hour or fuel
tank refilled.DEF
blinking
/
Amber engine
solid
/
Red engine
solid
•40% torque
reduction
•5 mph
(8 km/h)
vehicle speed
limit
•1000 RPM
engine speed
limit.Add 1 gallon
(3.8L) DEF to
5 gallon (19.0L)
tank or 2 gallons
(7.6L) DEF to
10 gallon
(34.0L) tank.
Allow the
system to prime.
Fuel and Refueling121
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USA(fus)
Page 123 of 378

Low DEF Level Warning Indications and Vehicle Consequences
for Emergency Vehicles
DEF Tank LevelIndicator
LampsConsequence Remedy
Above initial
warning threshold
(Over 25% full).None. None. None.
Below initial warning
threshold (25% full).DEF solid
None.
Add 1 gallon
(3.8L) DEF to
5 gallon (19.0L)
tank or 2 gallons
(7.6L) DEF to
10 gallon
(34.0L) tank. Critical warning
threshold (20% full).DEF
blinking
None.
First vehicle
consequence (15%
full).DEF
blinking
/
Amber engine
solid
Vehicle speed
limited to
55 mph
(88 km/h).
*
Final vehicle
consequence
(Empty) and engine
intentionally shut
down (key off) or in
extended idle for
one hour.DEF
blinking
/
Amber engine
solid
/
Red engine
solid
Vehicle speed
limited to
25 mph
(40 km/h).
**
Add 1 gallon
(3.8L) DEF to
5 gallon (19.0L)
tank or 2 gallons
(7.6L) DEF to
10 gallon
(34.0L) tank.
Allow the
system to prime.
*The vehicle speed restriction is suspended during pump operation when
using any of the following engine control modes:
•Power take-off
•Remote power take-off
•Remote throttle
•SAE J1939–commanded pressure governor.
**Those installations using a transmission tailshaft-driven power take-off
or pump during a stationary operation are also limited to 25 mph
(40 km/h) equivalent tailshaft speed during a final vehicle consequence.
122Fuel and Refueling
2013 F-650/750(f67)
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USA(fus)
Page 124 of 378

Incorrect DEF Quality Warning Indications and Vehicle
Consequences
ConditionIndicator
LampsConsequence Remedy
Correct DEF quality. None. None. None.
Initial warning when
incorrect DEF
quality is detected.Amber engine
solid
None.
Replace DEF
with
Ford-approved Initial warning one
hour after incorrect
DEF quality is
detected.Amber engine
solid
25% torque
reduction.
Initial warning three
hours after incorrect
DEF quality is
detected.Amber engine
solid
Torque
reduction
increases
from 25% to
40% at rate of
1% each
minute.
Final vehicle
consequence three
hours after incorrect
DEF quality is
detected and engine
intentionally shut
down (key off), in
extended idle for
one hour or fuel
tank refilled.
*
Amber engine
solid
/
Red engine
solid
•25% torque
reduction
•5 mph
(8 km/h)
vehicle speed
limit
•1000 RPM
engine speed
limit.
**
*
Refueling the fuel tank is defined as increasing the fuel volume level by
15%.
**Final consequence for vehicles equipped with a manual transmission is
1000 RPM. Final consequence for vehicles equipped with an automatic
transmission is 1100 RPM.
Fuel and Refueling123
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Incorrect DEF Quality Warning Indications and Vehicle
Consequences for Emergency Vehicles
ConditionIndicator
LampsConsequence Remedy
Correct DEF quality. None. None. None.
Initial warning when
incorrect DEF
quality is detected.Amber engine
solid
None.
Replace DEF
with
Ford-approved
DEF. Initial warning
10 hours after
incorrect DEF
quality is detected.Amber engine
solid
Vehicle speed
limited to
55 mph
(88 km/h).
*
Final vehicle
consequence
20 hours after
incorrect DEF
quality is detected
and engine
intentionally shut
down (key off), in
extended idle for
one hour or fuel
tank refilled.
*
Amber engine
solid
/
Red engine
solid
Vehicle speed
limited to
25 mph
(40 km/h).
*The vehicle speed restriction is suspended during pump operation when
using any of the following engine control modes:
•Power take-off
•Remote power take-off
•Remote throttle
•SAE J1939–commanded pressure governor.
124Fuel and Refueling
2013 F-650/750(f67)
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USA(fus)
Page 126 of 378

SCR Faults and Vehicle Consequences
ConditionIndicator
LampsConsequence Remedy
No faults. None. None. None.
Initial warning when
fault is detected.Amber engine
solid
None.
Correct and
clear fault
condition. Initial warning one
hour after fault is
detected.Amber engine
solid
25% torque
reduction.
Secondary warning
five hours after fault
is detected.Amber engine
solid
Torque
reduction
increases
from 25% to
40% at rate of
1% each
minute.
Final vehicle
consequence five
hours after fault is
detected and engine
intentionally shut
down (key off), in
extended idle for
one hour or fuel
tank refilled.
*
Amber engine
solid
/
Red engine
solid
•40% torque
reduction
•5 mph
(8 km/h)
vehicle speed
limit
•1000 RPM
engine speed
limit.
**
*
Refueling the fuel tank is defined as increasing the fuel volume level by
15%.
**Final consequence for vehicles equipped with a manual transmission is
1000 RPM. Final consequence for vehicles equipped with an automatic
transmission is 1100 RPM.
Fuel and Refueling125
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USA(fus)
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SCR Faults and Vehicle Consequences for Emergency Vehicle
ConditionIndicator
LampsConsequence Remedy
No faults. None. None. None.
Initial warning when
fault is detected.Amber engine
solid
None.
Correct and
clear fault
condition. Initial warning
10 hours after fault
is detected.Amber engine
solid
Vehicle speed
limited to
55 mph
(88 km/h).
*
Final vehicle
consequence at
40 hours after fault
is detected and
engine intentionally
shut down (key off)
or in extended idle
for one hour.Amber engine
solid
/
Red engine
solidVehicle speed
limited to
25 mph
(40 km/h).
*The vehicle speed restriction is suspended during pump operation when
using any of the following engine control modes:
•Power take-off
•Remote power take-off
•Remote throttle
•SAE J1939–commanded pressure governor.
Filling the DEF Tank
WARNING:Make sure that DEF does not come into contact
with eyes, skin or clothing. Should DEF contact your eyes, flush
them with plenty of water and contact a physician. Clean affected skin
with soap and water. If DEF is swallowed, drink plenty of water and
contact a physician immediately.
WARNING:Refill DEF in a well-ventilated area. When opening
the cap on the DEF tank or bottle containing DEF, ammonia
vapors may escape. The vapors can be irritating to skin, eyes and
mucous membranes. Inhaling ammonia vapors can cause burning to the
eyes, throat and nose and cause coughing and watery eyes.
126Fuel and Refueling
2013 F-650/750(f67)
Owners Guide gf, 2nd Printing, March 2013
USA(fus)