1971 MERCURY COMET
Model Designations:
Mercury Comet, 6 & 8 Cylinder
Mercury Comet, 6 & 8 Cylinder, Body Styles:
2 Door Sedan, 6 Passenger, Body # 31
Factory Price: $2,217; Shipping Weight: 2,335 Pounds
Production Total: 54,884*
4 Door Sedan, 6 Passenger, Body # 30
Factory Price: $2,276; Shipping Weight: 2,366 Pounds
Production Total: 28,116*
6 & 8 Cylinder Production is combined.
Chassis:
Wheelbase:
2 Doors: 103"
4 Doors: 109.9"
Tire Sizes: 6:45 X 14"
Engine Availability by Model:
I-6 170 Cubic Inches 100 H.P. Standard Engine
I-6 200 Cubic Inches 115 H.P. Optional Engine
I-6 250 Cubic Inches 145 H.P. Optional Engine
V-8 302 Cubic Inches 210 H.P. Optional Engine
General Engine Specifications:
6 Cylinder, 170 Cubic Inch, 100 H.P. Engine:
Engine Type: Overhead Valve, Inline 6
Bore & Stroke: 3.50" x 2.93"
Engine Displacement: 170 Cu. In.
Compression Ratio: 8.70
Taxable Horsepower: 29.40
Horsepower: 100 @ 4,200 RPM
Torque: 148 Ft. Lbs @ 2,600 RPM
Normal Oil Pressure: 35-60 PSI
Carburetor: 1 Barrel
6 Cylinder, 200 Cubic Inch, 115 H.P. Engine:
Engine Type: Overhead Valve, Inline 6
Bore & Stroke: 3.68" x 3.13"
Engine Displacement: 200 Cu. In.
Compression Ratio: 8.70
Taxable Horsepower: 32.50
Horsepower: 115 @ 4,000 RPM
Torque: 180 Ft. Lbs @ 2,200 RPM
Normal Oil Pressure: 35-60 PSI
Carburetor: 1 Barrel
6 Cylinder, 250 Cubic Inch, 145 H.P. Engine:
Engine Type: Overhead Valve, Inline 6
Bore & Stroke: 3.68" x 3.91"
Engine Displacement: 250 Cu. In.
Compression Ratio: 9.0
Taxable Horsepower: 32.50
Horsepower: 145 @ 4,000 RPM
Torque: 232 Ft. Lbs @ 1,600 RPM
Normal Oil Pressure: 35-60 PSI
Carburetor: 1 Barrel
8 Cylinder, 210 H.P. 302 Cubic Inch Engine:
Engine Type: Overhead Valve, V-8
Bore & Stroke: 4.00" x 3.00"
Engine Displacement: 302 Cu. In.
Compression Ratio: 9.00:1
Taxable Horsepower: 51.20
Horsepower: 210 @ 4,600 RPM
Torque: 296 Ft. Lbs @ 2,600 RPM
Normal Oil Pressure: 35-60 PSI
Carburetor: 2 Barrel
Tune Up Specifications - All Series:
6 Cylinder, 170 Cubic Inch Engine:
Spark Plug Type: Autolite BRF-82
Spark Plug: Gap .034"
Point Gap: .027"
Distributor Cam Angle: 35-40 Degrees
Firing Order: 1-5-3-6-2-4
Ignition Timing: 6 Degrees BTDC
Engine Idle Speed:
Standard Transmission: 750 RPM; With A/C: 800 RPM with A/C "Off"
Air Fuel Ratio:
Standard Transmission: 14.5 to 1
Idle CO:
Standard Transmission: 1.0%
6 Cylinder 200 Cubic Inch Engine:
Spark Plug Type: Autolite BRF-82
Spark Plug: Gap .034"
Point Gap: .027"
Distributor Cam Angle: 35-40 Degrees
Firing Order: 1-5-3-6-2-4
Ignition Timing: 6 Degrees BTDC
Engine Idle Speed:
Standard Transmission: 750 RPM; With A/C: 800 RPM with A/C "Off"
Automatic Transmission: 550 RPM in Drive; With A/C: 600 RPM in Drive with A/C "Off"
6 Cylinder 250 Cubic Inch Engine:
Spark Plug Type: Autolite BRF-82
Spark Plug: Gap .034"
Point Gap:
Dual Diaphragm: .027"
Single Diaphragm: .025"
Distributor Cam Angle:
Dual Diaphragm: 35-40 Degrees
Single Diaphragm: 37-42 Degrees
Firing Order: 1-5-3-6-2-4
Ignition Timing: 6 Degrees BTDC
Engine Idle Speed:
Standard Transmission: 600 RPM; 800 RPM with Throttle Solenoid Energized
Automatic Transmission: 500 RPM in Drive; 600 RPM in Drive with Throttle Solenoid Energized
Air to Fuel Ratio:
Standard Transmission: 14.2 to 1
Automatic Transmission: 14.2 to 1
Idle CO:
Standard Transmission: 1.5%
Automatic Transmission: 1.5%
8 Cylinder 302 Cubic Inch Engine:
Spark Plug Type: Autolite BRF-42
Spark Plug: Gap .034"
Point Gap: .021"
Distributor Cam Angle: 24-29 Degrees
Firing Order: 1-5-4-2-6-3-7-8
Ignition Timing: 6 Degrees BTDC
Engine Idle Speed:
Standard Transmission: 500 RPM; 800 RPM with Throttle Solenoid Energized
Automatic Transmission: 500 RPM; 600 RPM in Drive with Throttle Solenoid Energized
Air to Fuel Ratio:
Standard Transmission: 14.5 to 1
Automatic Transmission: 14.5 to 1
Idle CO:
Standard Transmission: 0.3%
Automatic Transmission: 0.4%
Valve Specifications:
6 Cylinder Engines, 170 Cubic Inch:
Valve Lash:
Intake: .066"-.117"
Exhaust: .066"-.117"
Valve Angles:
Seat: 45 Degrees
Face: 44 Degrees
Valve Spring Height, Installed: 1-9/16"
Valve Spring Pressure: 150 Lbs @ 1.22"
Valve Stem Clearance:
Intake .0008"-.0025"
Exhaust .001"-.0027"
Valve Stem Diameter:
Intake: .3100"-.3107"
Exhaust: .3098"-.3105"
6 Cylinder Engines, 200 Cubic Inch:
Valve Lash:
Intake: .079"-.144"
Exhaust: .079"-.144"
Valve Angles:
Seat: 45 Degrees
Face: 44 Degrees
Valve Spring Height, Installed: 1-9/16"
Valve Spring Pressure: 150 Lbs @ 1.22"
Valve Stem Clearance:
Intake .0008"-.0025"
Exhaust .001"-.0027"
Valve Stem Diameter:
Intake: .3100"-.3107"
Exhaust: .3098"-.3105"
6 Cylinder Engines, 250 Cubic Inch:
Valve Lash:
Intake: .095"-.145"
Exhaust: .095"-.145"
Valve Angles:
Seat: 45 Degrees
Face: 44 Degrees
Valve Spring Height, Installed: 1-9/16"
Valve Spring Pressure: 150 Lbs @ 1.22"
Valve Stem Clearance:
Intake .0008"-.0025"
Exhaust .001"-.0027"
Valve Stem Diameter:
Intake: .3100"-.3107"
Exhaust: .3098"-.3105"
8 Cylinder 302 Cubic Inch Engine:
Valve Lash:
Intake: .090"-.190"
Exhaust: .090"-.190"
Valve Angles:
Seat: 45 Degrees
Face: 44 Degrees
Valve Spring Height, Installed: 1-5/8"
Valve Spring Pressure: 180 Lbs @ 1.23"
Valve Stem Clearance:
Intake .001"-.0027"
Exhaust .001"-.0027"
Valve Stem Diameter:
Intake: .3416"-.3423"
Exhaust: .3411"-.3418"
Piston, Rings, Pins, Crankshaft & Bearing Data:
6 Cylinder 170 & 200 Cubic Inch Engines:
Piston Clearance: .0014"-.0020"
Ring End Gap:
Compression: .010"
Oil: .015"
Wrist Pin Diameter: .912"
Rod Bearings:
Shaft Diameter: 2.1232"-2.1240"
Bearing Clearance: .0008"-.0015"
Main Bearings:
Shaft Diameter: 2.2482"-2.2490"
Bearing Clearance: .0005"-.0015"
Thrust on Bearing:
#3 on 170 Cubic Inch Engines
#5 on 200 Cubic Inch Engines
Crankshaft End Play: .004"-.008"
6 Cylinder 250 Cubic Inch Engines:
Piston Clearance: .0014"-.0020"
Ring End Gap:
Compression: .010"
Oil: .015"
Wrist Pin Diameter: .912"
Rod Bearings:
Shaft Diameter: 2.1232"-2.1240"
Bearing Clearance: .0008"-.0026"
Main Bearings:
Shaft Diameter: 2.3982"-2.3990"
Bearing Clearance: .0005"-.0025"
Thrust on Bearing: #5
Crankshaft End Play: .004"-.008"
8 Cylinder, 302 Cubic Inch Engine:
Piston Clearance: .0018"-.0026"
Ring End Gap:
Compression: .010"
Oil: .015"
Wrist Pin Diameter: .912"
Rod Bearings:
Shaft Diameter: 2.1228"-2.1236"
Bearing Clearance: .0008"-.0026"
Main Bearings:
Shaft Diameter: 2.2482"-2.2490"
Bearing Clearance: .0005"-.0025"
Thrust on Bearing #3
Crankshaft End Play: .004"-.008"
Engine Tightening Specifications:
6 Cylinder 170, 200 & 250 Cubic Inch Engines:
Spark Plugs: 15-20 Ft. Lbs.
Cylinder Head Bolts: 70-75 Ft. Lbs.
Exhaust Manifold: 13-18 Ft. Lbs.
Rocker Arm Shaft Bracket: 30-35 Ft. Lbs.
Rocker Arm Cover: 3-5 Ft. Lbs.
Connecting Rod Cap Bolts: 19-24 Ft. Lbs.
Main Bearing Cap Bolts: 60-70 Ft. Lbs.
Flywheel to Crankshaft: 75-85 Ft. Lbs.
Vibration Damper or Pulley: 85-100 Ft. Lbs.
8 Cylinder 302 Cubic Inch Engines:
Spark Plugs: 15-20 Ft. Lbs.
Cylinder Head Bolts: 65-72 Ft. Lbs.
Intake Manifold: 23-25 Ft. Lbs.
Exhaust Manifold: 12-16 Ft. Lbs.
Rocker Arm Cover: 3-5 Ft. Lbs.
Connecting Rod Cap Bolts: 19-24 Ft. Lbs.
Main Bearing Cap Bolts: 60-70 Ft. Lbs.
Flywheel to Crankshaft: 75-85 Ft. Lbs.
Vibration Damper or Pulley: 100-130 Ft. Lbs.
Capacities-All Series:
6 Cylinder 170 Cubic Inch Engine:
Cooling System:
Without Heater: 8-1/4 Quarts
With Heater: 9-1/4 Quarts
With Air Conditioning: 9-1/4 Quarts
Radiator Cap Pressure:
With Air Conditioning: 12-15 PSI
Without Air Conditioning: 12-15 PSI
Thermostat Opening: 190 Degrees
Fuel Tank: 16 Gallons
Engine Oil Refill: 4-1/2 Quarts*
Manual Transmission:
Three Speed: 3-1/2 Pints
Automatic Transmission: 8 Quarts
Rear Axle: 4 Pints
* With New Oil Filter
6 Cylinder 200 Cubic Inch Engine:
Cooling System:
Without Heater: 7-1/2 Quarts
With Heater: 8-1/2 Quarts
With Air Conditioning: 8-1/2 Quarts
Radiator Cap Pressure:
With Air Conditioning: 12-15 PSI
Without Air Conditioning: 12-15 PSI
Thermostat Opening: 190 Degrees
Fuel Tank: 16 Gallons
Engine Oil Refill: 4-1/2 Quarts*
Manual Transmission:
Three Speed: 3-1/2 Pints
Automatic Transmission: 8 Quarts
Rear Axle: 4 Pints
* With New Oil Filter
6 Cylinder 250 Cubic Inch Engine:
Cooling System:
Without Heater: 7-1/2 Quarts
With Heater: 8-1/2 Quarts
With Air Conditioning: 8-1/2 Quarts
Radiator Cap Pressure:
With Air Conditioning: 12-15 PSI
Without Air Conditioning: 12-15 PSI
Thermostat Opening: 190 Degrees
Fuel Tank: 16 Gallons
Engine Oil Refill: 4-1/2 Quarts*
Manual Transmission:
Three Speed: 3-1/2 Pints
Automatic Transmission: 8 Quarts
Rear Axle: 4 Pints
* With New Oil Filter
8 Cylinder 302 Cubic Inch Engine:
Cooling System:
Without Heater: 14 Quarts
With Heater: 15 Quarts
With Air Conditioning: 15 Quarts
Radiator Cap Pressure:
With Air Conditioning: 12-15 PSI
Without Air Conditioning: 12-15 PSI
Thermostat Opening: 190 Degrees
Fuel Tank: 16 Gallons
Engine Oil Refill: 5 Quarts*
Manual Transmission:
Three Speed: 3-1/2 Pints
Four Speed: 4 Pints
Automatic Transmission: 9 Quarts
Rear Axle: 4 Pints
* With New Oil Filter
Starting Motor Specifications:
6 Cylinder 170 & 200 Cubic Inch Engines:
Part #D0ZF-B
Brush Spring Tension: 40 Ounces
No Load Test: 70 Amperes, 12 Volts
Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.
6 Cylinder 200 Cubic Inch Engines:
Part #D0OF-A
Brush Spring Tension: 40 Ounces
No Load Test: 70 Amperes, 12 Volts
Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.
6 Cylinder 250 Cubic Inch Engines:
Part #D0ZF-A
Brush Spring Tension: 40 Ounces
No Load Test: 70 Amperes, 12 Volts
Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.
8 Cylinder 302 Cubic Inch Engines:
Part #D0ZF-A
Brush Spring Tension: 40 Ounces
No Load Test: 70 Amperes, 12 Volts
Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.
Part #D0AF-B
Brush Spring Tension: 40 Ounces
No Load Test: 70 Amperes, 12 Volts
Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.
Ford Alternator Specifications:
Note: Not all alternators shown are available on the Comet.
Part #D0ZF-10300-B
Current Rating: 38 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.4 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D0AF-10300-C
Current Rating: 42 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D0AF-10300-F
Current Rating: 42 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D0AF-10300-G
Current Rating: 42 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D0AF-10300-E
Current Rating: 55 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D0AF-10300-H
Current Rating: 55 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D0ZF-10300-A
Current Rating: 55 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.6-15.1 Volts
Contact Gap: .018"-.020"
Armature Air Gap: .042"-.052"
Field Relay:
Armature Air Gap: .011"-.013"
Closing Voltage @ 75 Degrees: 6.2 to 7.2 Volts
Part #D0ZF-10300-C
Current Rating: 55 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.6-15.1 Volts
Contact Gap: .018"-.020"
Armature Air Gap: .042"-.052"
Field Relay:
Armature Air Gap: .011"-.013"
Closing Voltage @ 75 Degrees: 6.2 to 7.2 Volts
Part #D0SF-10300-A
Current Rating: 55 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.6-15.1 Volts
Contact Gap: .018"-.020"
Armature Air Gap: .042"-.052"
Field Relay:
Armature Air Gap: .011"-.013"
Closing Voltage @ 75 Degrees: 6.2 to 7.2 Volts
Part #D0LF-10300-A
Current Rating: 55 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Part #D1ZF-10300-AA
Current Rating: 55 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D1AF-10300-AA
Current Rating: 61 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Voltage Regulator: (Autolite)
Voltage @ 75 Degrees: 13.5-15.3 Volts
Field Relay:
Closing Voltage @ 75 Degrees: 2.0 to 4.2 Volts
Part #D1AF-10300-A
Current Rating: 65 Amperes @ 15 Volts
Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts
Distributor Specifications:
Note: Not distributors shown are available on the Comet
Part #D9DF-B
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 4-1/2 to 6-1/2 Degrees @ 750 RPM
Intermediate Advance: 7 to 9 Degrees @ 1,000 RPM
Intermediate Advance: 9 to 11-1/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,050 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 8 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D0AF-Y
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-3/4 Degrees @ 750 RPM
Intermediate Advance: 6 to 8 Degrees @ 1,000 RPM
Intermediate Advance: 8 to 10-1/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,325 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 11 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D0DF-C
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 1/2 to 2-1/2 Degrees @ 500 RPM
Intermediate Advance: 9 to 11 Degrees @ 1,000 RPM
Intermediate Advance: 10 to 12-1/4 Degrees @ 1,500 RPM
Full Advance: 16 Degrees @ 2,800 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 7 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D0OF-AA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-1/2 Degrees @ 500 RPM
Intermediate Advance: 5 to 7-1/4 Degrees @ 750 RPM
Intermediate Advance: 10-1/4 to 12-1/2 Degrees @ 1,500 RPM
Full Advance: 18 Degrees @ 2,200 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 8-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D0OF-AC
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-3/4 Degrees @ 750 RPM
Intermediate Advance: 5-1/2 to 8 Degrees @ 1,000 RPM
Intermediate Advance: 7-1/4 to 9-1/4 Degrees @ 1,500 RPM
Full Advance: 13 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 5 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D0OF-G
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 3 to 5 Degrees @ 750 RPM
Intermediate Advance: 5-1/2 to 7-1/2 Degrees @ 1,000 RPM
Intermediate Advance: 6-3/4 to 8-3/4 Degrees @ 1,500 RPM
Full Advance: 13 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 10-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D0OF-T
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 2 to 4 Degrees @ 750 RPM
Intermediate Advance: 4-1/2 to 6-1/2 Degrees @ 1,000 RPM
Intermediate Advance: 7-3/4 to 10 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,300 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 12-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D0OF-U
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 1-1/4 to 3-1/4 Degrees @ 500 RPM
Intermediate Advance: 6-1/4 to 8-1/4 Degrees @ 750 RPM
Intermediate Advance: 8-1/4 to 10-1/2 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,275 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 12-1/2 Degrees @ 25" Vacuum
Part #D0OF-V
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 3/4 to 2-3/4 Degrees @ 750 RPM
Intermediate Advance: 3-3/4 to 5-3/4 Degrees @ 1,000 RPM
Intermediate Advance: 8-1/2 to 10-3/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,300 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 10-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1AF-NA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 3 to 7 Degrees @ 750 RPM
Intermediate Advance: 8 to 10 Degrees @ 1,000 RPM
Intermediate Advance: 10-1/2 to 12-1/2 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 8-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1DF-BB
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 3/4 Degrees @ 500 RPM
Intermediate Advance: 3 to 5 Degrees @ 750 RPM
Intermediate Advance: 9-1/2 to 11-3/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 7-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1DF-EA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-3/4 Degrees @ 750 RPM
Intermediate Advance: 5-1/2 to 8 Degrees @ 1,000 RPM
Intermediate Advance: 7-1/4 to 9-1/4 Degrees @ 1,500 RPM
Full Advance: 13 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 11-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1DF-FA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 2 Degrees @ 500 RPM
Intermediate Advance: 3-1/4 to 5 Degrees @ 750 RPM
Intermediate Advance: 9 to 11 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 8 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1DF-GA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 3/4 Degrees @ 750 RPM
Intermediate Advance: 3-1/4 to 5-3/4 Degrees @ 1,000 RPM
Intermediate Advance: 9 to 11-1/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 7 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1OF-AB
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-1/2 Degrees @ 500 RPM
Intermediate Advance: 3-1/2 to 5-1/4 Degrees @ 750 RPM
Intermediate Advance: 7 to 9 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 7-1/2 Degrees @ 25" Vacuum
Part #D1OF-BB
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1 Degrees @ 750 RPM
Intermediate Advance: 3-1/2 to 5-1/2 Degrees @ 1,000 RPM
Intermediate Advance: 7 to 9-1/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 7-1/2 Degrees @ 25" Vacuum
Part #D1OF-CA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-1/2 Degrees @ 500 RPM
Intermediate Advance: 3-1/4 to 5-1/4 Degrees @ 750 RPM
Intermediate Advance: 7 to 9-1/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 10 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1OF-GA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 3-1/4 to 5-1/4 Degrees @ 750 RPM
Intermediate Advance: 6-1/2 to 8-3/4 Degrees @ 1,000 RPM
Intermediate Advance: 8-1/4 to 10-1/2 Degrees @ 1,500 RPM
Full Advance: 13 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 11 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1OF-LA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 1/2 to 3-1/4 Degrees @ 750 RPM
Intermediate Advance: 5-1/4 to 7-1/4 Degrees @ 1,000 RPM
Intermediate Advance: 6-3/4 to 9 Degrees @ 1,500 RPM
Full Advance: 18 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 10-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1OF-PA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-1/2 Degrees @ 500 RPM
Intermediate Advance: 4-1/2 to 6-1/2 Degrees @ 750 RPM
Intermediate Advance: 10-1/2 to 12-3/4 Degrees @ 1,500 RPM
Full Advance: 14 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 11 Degrees @ 25" Vacuum
Part #D1ZF-AA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 0 to 1-1/2 Degrees @ 750 RPM
Intermediate Advance: 2-3/4 to 4-3/4 Degrees @ 1,000 RPM
Intermediate Advance: 8-3/4 to 10 Degrees @ 1,500 RPM
Full Advance: 11 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 2-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1ZF-EA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 1 to 3 Degrees @ 750 RPM
Intermediate Advance: 4 to 6 Degrees @ 1,000 RPM
Intermediate Advance: 9-1/2 to 12 Degrees @ 1,500 RPM
Full Advance: 15 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 10-1/2 Degrees @ 25" Vacuum
Maximum Retard: 7 Degrees @ 20" Vacuum
Part #D1ZF-FA
Centrifugal Advance:
Advance Starts: 0 to1/2 Degree @ 350 RPM
Intermediate Advance: 1-1/4 to 3-1/2 Degrees @ 750 RPM
Intermediate Advance: 4-1/4 to 6-1/4 Degrees @ 1,000 RPM
Intermediate Advance: 10 to 12 Degrees @ 1,500 RPM
Full Advance: 16-1/2 Degrees @ 2,500 RPM
Vacuum Advance Data:
Advance Starts @ 5" Vacuum
Full Advance: 8-1/2 Degrees @ 25" Vacuum
Brake Specifications, Passenger Cars, All Series
6 Cylinder Passenger Cars:
Brake Drum Diameter: 9.00"
Wheel Cylinder Bore:
Front Disc: 2.381"
Front Drum: 1.062"
Rear: .844"
Master Cylinder Bore:
Front Disc: .9375"
Drum Brakes: 1"
Power Brakes: .9375"
8 Cylinder Passenger Cars:
Brake Drum Diameter10.00"
Wheel Cylinder Bore:
Front Disc: 2.381"
Front Drum: 1.125"
Rear: .875"
Master Cylinder Bore:
Front Disc: .9375"
Drum Brakes: 1"
Power Brakes: .9375"
Rear Axle, All Models:
Carrier Type: Integral
Ring Gear & Pinion Backlash: .008"-.012"
Nominal Pinion Locating Shim: .017"
Method: Shims
Pinion Bearing Preload:
With New Bearings: 17-27 Inch Pounds
With Used Bearings: 6-12 Inch Pounds
Differential Bearing Preload:
With New Bearings: .008"-.012"
With Used Bearings: .003"-.005"
Pinion Nut Torque: 175 Ft. Lbs.
Carrier Type: Removable
Ring Gear & Pinion Backlash: .008"-.012"
Nominal Pinion Locating Shim:
With 7-3/4" or 8" Ring Gear: .022"
With 8-3/4" or 9" Ring Gear: .015"
Method: Shims
Pinion Bearing Preload:
With New Bearings:
With 7-3/4" or 8" Ring Gear: 17-32 Inch Pounds
With 8-3/4" or 9" Ring Gear: 22-32 Inch Pounds
With Used Bearings: 8-14 Inch Pounds
Differential Bearing Preload:
With New Bearings: .008"-.012"
With Used Bearings: .003"-.008"
Pinion Nut Torque: 175 Ft. Lbs.
Wheel Alignment Specifications:
All Models:
Caster: -1/2 Degrees
Camber:
Left: + 1/4 Degree
Right: + 1/4 Degree
Toe-In: 3/16"
Toe-Out on Turns:
Outer Wheel: 18.48 Degrees
Inner Wheel: 20 Degrees
Ford Carburetor Adjustments:
Note: See 1971 Ford Motor Company Carburetors Data File
Popular Options:
AM Radio & Antenna; AM-FM Radio; Automatic Transmission; White Wall Tires; Deluxe Wheel Covers; Air Conditioning; Front & Rear Bumper Guards; Consolette with Clock; Rear Window Defogger; Power Steering; Tinted Glass; Two-Tone Paint; Glamour Paint; Vinyl Roof; Bucket Seats; Trim Rings with Hubcaps; Various Trim Optionns; GT Package; Engine & Transmission Options; and Much More.
1971 Mercury Historical Data:
Introduction date of the 1971 Mercury Comet was on September 18, 1970.
Total Mercury Production for the1971 model year was 365,310 including 83,000 Comets.
In addition, 17,300 Capri's were imported from Germany.
1971 Mercury Colors & Codes:
A History Onyx Black
B Maroon
C Dark Green
D Competition Yellow
E Medium Yellow Gold
F Medium Blue
H Light Green
I Bright Lime Green
J Competition Blue
M Knight White
N Pastel Blue
P Medium Ivy Green
Q Medium Blue
S Gray Gold
T Red
U Competition Gold
V Light Pewter
W Yellow
Y Dark Blue
Z Competition Green
1 Competition Orange
2 Bright Yellow
3 Bright Red
5 Medium Brown
6 Bright Blue
7 Maroon
8 Light Gold
9 Pastel Yellow
49 Ivy Bronze
79 Ginger Bronze
Montego "Spoiler"
A Black
B Dark Blue
G Bright Yellow
Promotional Models Available:
Mercury Comet 2 Door Sedan.
Copyright 2001, Custom Solutions & Services