1973 MERCURY

MONTEGO

Model Designations:

Mercury Montego, 6 & 8 Cylinder

Mercury Montego MX, 6 & 8 Cylinder

Mercury Montego MX Brougham, 6 & 8 Cylinder

Mercury Montego GT, 8 Cylinder

Mercury Montego, 6 & 8 Cylinder, Body Styles:

4 Door Sedan, 6 Passenger, Body # 02

Factory Price: $2,916; Shipping Weight: 3,719 Pounds

Production Total: 7,459

2 Door Hardtop Coupe, 6 Passenger, Body # 03

Factory Price: $2,926; Shipping Weight: 3,653 Pounds

Production Total: 7,082

Mercury Montego MX, 6 & 8 Cylinder, Body Styles:

4 Door Sedan, 6 Passenger, Body # 10

Factory Price: $3,009; Shipping Weight: 3,772 Pounds

Production Total: 25,300

2 Door Hardtop Coupe, 6 Passenger, Body # 11

Factory Price: $3,041; Shipping Weight: 3,683 Pounds

Production Total: 27,812

4 Door Station Wagon, 6 Passenger, Body # 08

Factory Price: $3,417; Shipping Weight: 4,124 Pounds

Production Total: 7,012

Mercury Montego MX Brougham, 6 & 8 Cylinder, Body Styles:

4 Door Sedan, 6 Passenger, Body # 10

Factory Price: $3,189; Shipping Weight: 3,813 Pounds

Production Total: 24,329

2 Door Hardtop Coupe, 6 Passenger, Body # 11

Factory Price: $3,209; Shipping Weight: 3,706 Pounds

Production Total: 40,591

4 Door Villager Station Wagon, 6 Passenger, Body # 18

Factory Price: $3,606; Shipping Weight: 4,167 Pounds

Production Total: 12,396

Note: 6 & 8 Cylinder Production Figures are combined for all series.

Mercury Montego GT, 8 Cylinder, Body Styles:

2 Door Hardtop Fastback Coupe, 5 Passenger, Body # 16

Factory Price: $3,413; Shipping Weight: 3,662 Pounds

Production Total: 4,464

Chassis:

Wheelbase:

4 Door Models & Station Wagons: 118"

2 Door Models: 114"

Tire Sizes:

Station Wagons: F78 X 14" or G78 X 14"

Other Models: E78 X 14"

Engine Availability by Model:

I-6 250 Cubic Inches 92 H.P. Standard on all Montego Models.

V-8 302 Cubic Inches 137 H.P. Optional on all Montego Models.

V-8 302 Cubic Inches 138 H.P. Optional on all Montego Models.

V-8 351 Cubic Inches 159 H.P. Optional on all Montego Models.

V-8 351 Cubic Inches 246 H.P. Optional on Montego Coupes.

V-8 400 Cubic Inches 168 H.P. Optional on all Montego Models

V-8 429 Cubic Inches 197 H.P. Optional Engine

V-8 429 Cubic Inches 201 H.P. Optional Engine

General Engine Specifications:

6 Cylinder, 92 H.P. Engine:

Engine Type: Overhead Valve, Inline 6

Bore & Stroke: 3.680" x 3.91"

Engine Displacement: 250 Cu. In.

Compression Ratio: 8.00:1

Taxable Horsepower: 32.50

Horsepower: 92 @ 3,200 RPM

Torque: 197 Ft. Lbs @ 1,600 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 1 Barrel

8 Cylinder, 302 Cubic Inch, 137 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 3.00"

Engine Displacement: 302 Cu. In.

Compression Ratio: 8.00:1

Taxable Horsepower: 51.20

Horsepower: 137 @ 4,200 RPM

Torque: 230 Ft. Lbs @ 2,200 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 2 Barrel

8 Cylinder, 302 Cubic Inch, 138 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 3.00"

Engine Displacement: 302 Cu. In.

Compression Ratio: 8.00:1

Taxable Horsepower: 51.20

Horsepower: 138 @ 4,200 RPM

Torque: 234 Ft. Lbs @ 2,200 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 2 Barrel

8 Cylinder, 351 Cubic Inch, 159 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 3.50"

Engine Displacement: 351 Cu. In.

Compression Ratio: 8.00:1

Taxable Horsepower: 51.20

Horsepower: 159 @ 4,000 RPM

Torque: 250 Ft. Lbs @ 2,400 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 2 Barrel

8 Cylinder, 351 Cubic Inch, 246 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 3.50"

Engine Displacement: 351 Cu. In.

Compression Ratio: 8.00:1

Taxable Horsepower: 51.20

Horsepower: 246 @ 5,400 RPM

Torque: 312 Ft. Lbs @ 3,600 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 4 Barrel

8 Cylinder, 400 Cubic Inch, 168 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 4.00"

Engine Displacement: 400 Cu. In.

Compression Ratio: 8.00:1

Taxable Horsepower: 51.20

Horsepower: 168 @ 3,800 RPM

Torque: 310 Ft. Lbs @ 2,000 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 4 Barrel

V-8 Engine, 429 Cubic Inches, 197 H.P.:

Engine Type: Overhead Valve, V-8

Bore & Stroke: 4.36" x 3.59"

Engine Displacement: 429 Cu. In.

Compresssion Ratio: 8.00 to 1

Taxable Horsepower: 60.83

Horsepower: 197 @ 4,400 RPM

Torque: 320 Ft. Lbs @ 2,600 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 4 Barrel

V-8 Engine, 429 Cubic Inches, 201 H.P.:

Engine Type: Overhead Valve, V-8

Bore & Stroke: 4.36" x 3.59"

Engine Displacement: 429 Cu. In.

Compresssion Ratio: 8.00 to 1

Taxable Horsepower: 60.83

Horsepower: 201 @ 4,400 RPM

Torque: 322 Ft. Lbs @ 2,600 RPM

Normal Oil Pressure: 35-60 PSI

Carburetor: 4 Barrel

Tune Up Specifications - All Series:

6 Cylinder 250 Cubic Inch Engine:

Spark Plug Type: Autolite BRF-82

Spark Plug: Gap .034"

Point Gap: .025"

Distributor Cam Angle: 33-39 Degrees

Firing Order: 1-5-3-6-2-4

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 750 RPM

Automatic Transmission: 600 RPM in Drive

Idle CO:

Standard Transmission: 0.5%

Automatic Transmission: 0.5%

8 Cylinder 302 Cubic Inch Engine:

Spark Plug Type: Autolite BRF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 24-30 Degrees

Firing Order: 1-5-4-2-6-3-7-8

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 800 RPM

Automatic Transmission: 650 RPM, in Drive

Idle CO: 0.5%

8 Cylinder 351 Cubic Inch Engine, with 2 Barrel Carburetor, Windsor Engine:

Spark Plug Type: Autolite ARF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 24-30 Degrees

Firing Order: 1-3-7-2-6-5-4-8

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 625 RPM in Drive

Idle CO:

Automatic Transmission: 0.5%

8 Cylinder 351 Cubic Inch Engine, with 2 Barrel Carburetor, Cleveland Engine:

Spark Plug Type: Autolite ARF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 24-30 Degrees

Firing Order: 1-3-7-2-6-5-4-8

Ignition Timing: 10 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 625 RPM in Drive

Idle CO:

Automatic Transmission: 0.5%

8 Cylinder 351 Cubic Inch Engine, with 4 Barrel Carburetor:

Spark Plug Type: Autolite ARF-42

Spark Plug: Gap .034"

Point Gap:

Standard Transmission: .020"

Automatic Transmission: .017"

Distributor Cam Angle:

Standard Transmission: 32-35 Degrees

Automatic Transmission: 24-30 Degrees

Firing Order: 1-3-7-2-6-5-4-8

Ignition Timing:

Standard Transmission: 16 Degrees BTDC

Automatic Transmission: 18 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 900 RPM

Automatic Transmission: 700 RPM in Drive

Idle CO:

Standard Transmission: 0.6%

Automatic Transmission: 0.5%

8 Cylinder 400 Cubic Inch Engine:

Spark Plug Type: Autolite ARF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 24-30 Degrees

Firing Order: 1-5-4-2-6-7-3-8

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 625 RPM in Drive

Idle CO:

Automatic Transmission: 0.50%

8 Cylinder 429 Cubic Inch Engine:

Spark Plug Type: Autolite BRF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 24-30 Degrees

Firing Order: 1-5-4-2-6-7-3-8

Ignition Timing: 18 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 600 RPM in Drive

Idle CO: 0.4%

Valve Specifications:

6 Cylinder Engines, 250 Cubic Inch:

Valve Lash:

Intake: .095"-.145"

Exha

ust: .095"-.145"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-37/64"

Valve Spring Pressure: 149 Lbs @ 1.20"

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"-.140"

Exhaust: .090"-.140"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-11/16"

Valve Spring Pressure: 200 Lbs @ 1.31"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0015"-.0032"

Valve Stem Diameter:

Intake: .3416"-.3423"

Exhaust: .3411"-.3418"

8 Cylinder 351 Cubic Inch Windsor Engine:

Valve Lash:

Intake: .106"-.156"

Exhaust: .106"-.156"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-25/32"

Valve Spring Pressure: 210 Lbs @ 1.34"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0015"-.0032"

Valve Stem Diameter:

Intake: .3416"-.3423"

Exhaust: .3411"-.3418"

8 Cylinder 351 Cubic Inch Cleveland Engine, with 2 Barrel Carburetor:

Valve Lash:

Intake: .100"-.150"

Exhaust: .100"-.150"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-53/64"

Valve Spring Pressure: 210 Lbs @ 1.42"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0015"-.0032"

Valve Stem Diameter:

Intake: .3416"-.3423"

Exhaust: .3411"-.3418"

8 Cylinder 351 Cubic Inch Cleveland Engine, with 4 Barrel Carburetor:

Valve Lash:

Intake: .100"-.150"

Exhaust: .100"-.150"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-53/64"

Valve Spring Pressure: 285 Lbs @ 1.32"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0015"-.0032"

Valve Stem Diameter:

Intake: .3416"-.3423"

Exhaust: .3411"-.3418"

8 Cylinder 400 Cubic Inch Engine:

Valve Lash:

Intake: .100"-.150"

Exhaust: .100"-.150"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-53/64"

Valve Spring Pressure: 226 Lbs @ 1.39"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0015"-.0032"

Valve Stem Diameter:

Intake: .3416"-.3423"

Exhaust: .3411"-.3418"

8 Cylinder Engine, 429 Cu. In.

Valve Lash:

Intake: .075"-.125"

Exhaust: .075"-.125"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-13/16"

Valve Spring Pressure: 169 Lbs @ 1.39 inches

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .001"-.0027"

Valve Stem Diameter:

Intake: .3416"-.3423"

Exhaust: .3416"-.3423"

Piston, Rings, Pins, Crankshaft & Bearing Data:

6 Cylinder Engines:

Piston Clearance: .0013"-.0021"

Ring End Gap:

Compression: .008"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.1232"-2.1240"

Bearing Clearance: .0008"-.0024"

Main Bearings:

Shaft Diameter: 2.3982"-2.3990"

Bearing Clearance: .0008"-.0024"

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"-.0024"

Thrust on Bearing #3

Crankshaft End Play: .004"-.008"

8 Cylinder, 351 Cubic Inch Windsor Engine, with 2 Barrel Carburetor:

Piston Clearance: .0018"-.0026"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.3103"-2.3111"

Bearing Clearance: .0008"-.0026"

Main Bearings:

Shaft Diameter: 2.9994"-3.0002"

Bearing Clearance: .0008"-.0026"

Thrust on Bearing #3

Crankshaft End Play: .004"-.008"

8 Cylinder, 351 Cubic Inch Cleveland Engine, with 2 Barrel Carburetor:

Piston Clearance: .0014"-.0022"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.3103"-2.3111"

Bearing Clearance: .0008"-.0026"

Main Bearings:

Shaft Diameter: 2.7484"-2.74922"

Bearing Clearance: .0009"-.0026"

Thrust on Bearing #3

Crankshaft End Play: .004"-.010"

8 Cylinder, 351 Cubic Inch Engine, with 4 Barrel Carburetor::

Piston Clearance: .0034"-.0042"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.3103"-2.3110"

Bearing Clearance: .0011"-.0026"

Main Bearings:

Shaft Diameter: 2.7484"-2.7492"

Bearing Clearance: .0011"-.0028"

Thrust on Bearing #3

Crankshaft End Play: .004"-.010"

8 Cylinder, 351 Cubic Inch High Performance Engine, with 4 Barrel Carburetor::

Piston Clearance: .0034"-.0042"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.3103"-2.3111"

Bearing Clearance: .0011"-.0026"

Main Bearings:

Shaft Diameter: 2.7484"-2.7492"

Bearing Clearance: .0011"-.0028"

Thrust on Bearing #3

Crankshaft End Play: .004"-.010"

8 Cylinder, 400 Cubic Inch Engine:

Piston Clearance: .0014"-.0022"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.3103"-2.3111"

Bearing Clearance: .0008"-.0026"

Main Bearings:

Shaft Diameter: 2.9994"-3.0002"

Bearing Clearance: .0009"-.0026"

Thrust on Bearing #3

Crankshaft End Play: .004"-.008"

8 Cylinder, 429 Cubic Inch Engine

Piston Clearance: .0014"-.0022"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .975"

Rod Bearings:

Shaft Diameter: 2.4992"-2.5000"

Bearing Clearance: .0008"-.0028"

Main Bearings:

Shaft Diameter: 2.9994"-3.0002"

Bearing Clearance:

#1: .0004"-.0020"

Others: .0012"-.0028"

Thrust on Bearing #3

Crankshaft End Play: .004"-.008"

Engine Tightening Specifications:

6 Cylinder Engine:

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: 21-26 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 Studs: 17-23 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: 70-90 Ft. Lbs.

8 Cylinder 351 Cubic Inch Windsor Engines:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 105-112 Ft. Lbs.

Intake Manifold: 23-25 Ft. Lbs.

Exhaust Manifold: 18-24 Ft. Lbs.

Rocker Arm Studs: 17-23 Ft. Lbs.

Rocker Arm Cover: 3-5 Ft. Lbs.

Connecting Rod Cap Bolts: 40-45 Ft. Lbs.

Main Bearing Cap Bolts: 95-105 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 100-130 Ft. Lbs.

8 Cylinder 351 Cubic Inch Cleveland Engines:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 95-100 Ft. Lbs.

Intake Manifold:

5/16" Bolts: 21-25 Ft. Lbs.

3/8" Bolts: 27-33 Ft. Lbs

1/4" Bolts: 6-9 Ft. Lbs

Exhaust Manifold: 12-22 Ft. Lbs.

Rocker Arm Studs: 17-23 Ft. Lbs.

Rocker Arm Cover: 3-5 Ft. Lbs.

Connecting Rod Cap Bolts: 40-45 Ft. Lbs.

Main Bearing Cap Bolts:

1/2" Bolts: 95-105 Ft. Lbs.

3/8" Bolts: 35-45 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 70-90 Ft. Lbs.

8 Cylinder 400 Cubic Inch Engines:

Spark Plugs: 10-15 Ft. Lbs.

Cylinder Head Bolts: 95-100 Ft. Lbs.

Intake Manifold:

5/16" Bolts: 21-25 Ft. Lbs.

3/8" Bolts. 27-33 Ft. Lbs.

1/4" Bolts: 6-9 Ft. Lbs.

Exhaust Manifold: 12-16 Ft. Lbs.

Rocker Arm Stud Nut: 18-25 Ft. Lbs.

Rocker Arm Cover: 3-5 Ft. Lbs.

Connecting Rod Cap Bolts: 40-45 Ft. Lbs.

Main Bearing Cap Bolts:

1/2" Bolts: 95-105 Ft. Lbs.

3/8" Bolts: 35-45 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 70-90 Ft. Lbs.

8 Cylinder, 429 Cubic Inch Engine:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 130-140 Ft. Lbs.

Intake Manifold: 25-30 Ft. Lbs.

Exhaust Manifold: 28-33 Ft. Lbs.

Rocker Arm Stud Nut: 18-25 Ft. Lbs.

Rocker Arm Cover: 5 to 6 Ft. Lbs.

Connecting Rod Cap Bolts: 40-45 Ft. Lbs.

Main Bearing Cap Bolts: 95-105 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 70-90 Ft. Lbs.

Capacities-All Series:

With 6 Cylinder Engine:

Cooling System:

Without Heater: 10-1/2 Quarts

With Heater: 11-1/2 Quarts

With Air Conditioning: 11-1/2 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank:

Passenger Cars: 22-1/2 Gallons

Station Wagons: 20-1/2 Gallons

Engine Oil Refill: 4-1/2 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Automatic Transmission: 9 Quarts

Rear Axle: 4 Pints

* With New Oil Filter

With 8 Cylinder, 302 Cubic Inch Engine:

Cooling System:

Without Heater: 14-1/2 Quarts

With Heater: 15-1/4 Quarts

With Air Conditioning: 15-3/4 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank:

Passenger Cars: 22-1/2 Gallons

Station Wagons: 20-1/2 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

With 8 Cylinder, 351 Cubic Inch Engine:

Cooling System:

Without Heater: 14-3/4 Quarts

With Heater: 15-3/4 Quarts

With Air Conditioning: 16-3/4 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank:

Passenger Cars: 22-1/2 Gallons

Station Wagons: 20-1/2 Gallons

Engine Oil Refill: 5 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 4 Pints

Automatic Transmission: 10-1/2 Quarts

Rear Axle: 5 Pints

* With New Oil Filter

With 8 Cylinder, 400 Cubic Inch Engine:

Cooling System:

Without Heater: 16-3/4 Quarts

With Heater: 17-3/4 Quarts

With Air Conditioning: 17-3/4 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank:

Passenger Cars: 22-1/2 Gallons

Station Wagons: 20-1/2 Gallons

Engine Oil Refill: 5 Quarts*

Manual Transmission:

Four Speed: 4 Pints

Automatic Transmission: 12-1/2 Quarts

Rear Axle: 5 Pints

* With New Oil Filter

With 8 Cylinder, 429 Cubic Inch Engines:

Cooling System:

Without Heater: 17-3/4 Quarts

With Heater: 18-3/4 Quarts

With Air Conditioning: 18-3/4 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank:

Passenger Cars: 22-1/2 Gallons

Station Wagons: 20-1/2 Gallons

Engine Oil Refill: 5 Quarts*

Standard Transmission:

4 Speed: 4 Pints

Automatic Transmission: 12-3/4 Quarts

Rear Axle: 5 Pints

* With New Oil Filter

Starting Motor Specifications:

Cylinder 250 Cubic Inch Engines:

Part #D2AF-CA

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts

Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.

302 Cubic Inch 8 Cylinder Engines:

Part #D2AF-CA

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 #D2AF-DA

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts

Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.

351 Cubic Inch 8 Cylinder Engines:

Part #D2AF-CA

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 #D2AF-DA

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts

Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.

400 Cubic Inch 8 Cylinder Engines:

Part #D2AF-AA

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts

Torque Test: 670 Amperes, 5.0 Volts, @ 15-1/2 Ft. Lbs.

429 Cubic Inch 8 Cylinder Engines:

Part #C4OF-AA &BA

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts

Ford Alternator Specifications:

Note: Not all alternators shown are available on the Montego.

Purple, 38 Ampere Alternator:

Current Rating: 38 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts

Voltage Regulator #D3TZ-A

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.5 to 4.0 Volts

Orange, 42 Ampere Alternator:

Current Rating: 42 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts

Voltage Regulator #D3TZ-A

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.5 to 4.0 Volts

Red, 55 Ampere Alternator:

Current Rating: 55 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts

Voltage Regulator #D3TZ-A

Field Relay:

Closing Voltage @ 75 Degrees: 2.5 to 4.0 Volts

Green, 61 Ampere Alternator:

Current Rating: 61 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts

Voltage Regulator #D3TZ-A

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.5 to 4.0 Volts

Green, 70 Ampere Alternator:

Current Rating: 70 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.9 Amperes @ 12 Volts

Voltage Regulator #D3TZ-A

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.5 to 4.0 Volts

Distributor Specifications:

Note: Not distributors shown are available on the Montego

Part #D3AF-AA

Centrifugal Advance:

Advance Starts: 0 to 1-1/2 Degree @ 500 RPM

Intermediate Advance: 4 to 6 Degrees @ 750 RPM

Intermediate Advance: 6 to 8 Degrees @ 1,000 RPM

Intermediate Advance: 10 to 12-1/2 Degrees @ 1,500 RPM

Full Advance: 16-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 13 Degrees @ 20" Vacuum

Part #D3AF-BA

Centrifugal Advance:

Advance Starts: 0 to 1-1/2 Degree @ 500 RPM

Intermediate Advance: 3-1/2 to 5-1/2 Degrees @ 750 RPM

Intermediate Advance: 5-1/2 to 7-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 8-1/2 to 11 Degrees @ 1,500 RPM

Full Advance: 14-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 13 Degrees @ 20" Vacuum

Part #D3MF-BA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 1-1/2 Degrees @ 750 RPM

Intermediate Advance: 3-1/2 to 5-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 7-1/2 to 10 Degrees @ 1,500 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 7 Degrees @ 20" Vacuum

Part #D3MF-DA

Centrifugal Advance:

Advance Starts: 0 to 1 Degree @ 500 RPM

Intermediate Advance: 1-1/2 to 4 Degrees @ 750 RPM

Intermediate Advance: 5-1/2 to 7-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 7-1/2 to 9 Degrees @ 1,500 RPM

Full Advance: 10-1/2 Degrees @ 2,200 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11 Degrees @ 20" Vacuum

Part #D3MF-OA

Centrifugal Advance:

Advance Starts: 0 to 1 Degrees @ 500 RPM

Intermediate Advance: 0 to 2 Degrees @ 750 RPM

Intermediate Advance: 1-1/2 to 3-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 4-1/2 to 7 Degrees @ 1,500 RPM

Full Advance: 10-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 12-1/2 Degrees @ 20" Vacuum

Part #D3OF-AA

Centrifugal Advance:

Advance Starts: 0 to 1-1/2 Degree @ 500 RPM

Intermediate Advance: 6-1/2 to 8-1/2 Degrees @ 750 RPM

Intermediate Advance: 7 to 9 Degrees @ 1,000 RPM

Intermediate Advance: 8 to 10-1/2 Degrees @ 1,500 RPM

Full Advance: 11-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 9 Degrees @ 20" Vacuum

Maximum Retard: 4 Degrees @ 20" Vacuum

Part #D3OF-BA

Centrifugal Advance:

Advance Starts: 0 to1-1/2 Degree @ 500 RPM

Intermediate Advance: 4 to 6 Degrees @ 750 RPM

Intermediate Advance: 4-1/2 to 6-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 6 to 8 Degrees @ 1,500 RPM

Full Advance: 10 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 9 Degrees @ 20" Vacuum

Maximum Retard: 4 Degrees @ 20" Vacuum

Part #D3OF-DA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 1-1/2 Degrees @ 750 RPM

Intermediate Advance: 4 to 6 Degrees @ 1,000 RPM

Intermediate Advance: 7 to 9-1/2 Degrees @ 1,500 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Maximum Retard: 7 Degrees @ 20" Vacuum

Part #D3OF-EA

Centrifugal Advance:

Advance Starts: 0 to 1 Degrees @ 500 RPM

Intermediate Advance: 0 to 1-1/2 Degrees @ 750 RPM

Intermediate Advance: 4 to 6 Degrees @ 1,000 RPM

Intermediate Advance: 7 to 9-1/2 Degrees @ 1,500 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Maximum Retard: 4 Degrees @ 20" Vacuum

Part #D3OF-FA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 1-1/2 Degrees @ 750 RPM

Intermediate Advance: 1 to 3 Degrees @ 1,000 RPM

Intermediate Advance: 5-1/2 to 8 Degrees @ 1,500 RPM

Full Advance: 13 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Maximum Retard: 7 Degrees @ 20" Vacuum

Part #D3OF-GA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 1-1/2 Degrees @ 750 RPM

Intermediate Advance: 1 to 3 Degrees @ 1,000 RPM

Intermediate Advance: 6 to 8-1/2 Degrees @ 1,500 RPM

Full Advance: 13-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Part #D3OF-HA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 2-1/2 Degrees @ 750 RPM

Intermediate Advance: 2 to 4-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 5-1/2 to 8-1/2 Degrees @ 1,500 RPM

Full Advance: 12 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Part #D3OF-JA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 2-1/2 Degrees @ 750 RPM

Intermediate Advance: 2 to 4-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 5-1/2 to 8-1/2 Degrees @ 1,500 RPM

Full Advance: 12 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Part #D3OF-LA

Centrifugal Advance:

Advance Starts: 0 to1-1/2 Degree @ 500 RPM

Intermediate Advance: 4-1/2 to 6-1/2 Degrees @ 750 RPM

Intermediate Advance: 6 to 8 Degrees @ 1,000 RPM

Intermediate Advance: 8 to 10-1/2 Degrees @ 1,500 RPM

Full Advance: 12 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 9 Degrees @ 20" Vacuum

Maximum Retard: 4 Degrees @ 20" Vacuum

Part #D3OF-PA

Centrifugal Advance:

Advance Starts: 0 to 1 Degrees @ 500 RPM

Intermediate Advance: 0 to 2-1/2 Degrees @ 750 RPM

Intermediate Advance: 2 to 4-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 6 to 8-1/2 Degrees @ 1,500 RPM

Full Advance: 12-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Maximum Retard: 4 Degrees @ 20" Vacuum

Part #D3OF-RA

Centrifugal Advance:

Advance Starts: 0 to 1-1/2 Degrees @ 500 RPM

Intermediate Advance: 3-1/2 to 5-1/2 Degrees @ 750 RPM

Intermediate Advance: 5-1/2 to 7-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 6-1/2 to 8-1/2 Degrees @ 1,500 RPM

Full Advance: 10-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 9-1/2 Degrees @ 20" Vacuum

Maximum Retard: 4 Degrees @ 20" Vacuum

Part #D3SF-BA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 1/2 to 2-1/2 Degrees @ 750 RPM

Intermediate Advance: 5-1/2 to 8 Degrees @ 1,000 RPM

Intermediate Advance: 10 to 12 Degrees @ 1,500 RPM

Full Advance: 13-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11 Degrees @ 20" Vacuum

Part #D3UF-GA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 2-1/2 Degrees @ 750 RPM

Intermediate Advance: 2 to 4-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 5-1/2 to 8-1/2 Degrees @ 1,500 RPM

Full Advance: 12 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 5 Degrees @ 20" Vacuum

Maximum Retard: 4 Degrees @ 20" Vacuum

Part #D3VF-CA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 0 to 1-1/2 Degrees @ 750 RPM

Intermediate Advance: 4 to 6 Degrees @ 1,000 RPM

Intermediate Advance: 6 to 8 Degrees @ 1,500 RPM

Full Advance: 10 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11 Degrees @ 20" Vacuum

Part #D3ZF-CA

Centrifugal Advance:

Advance Starts: 0 to1 Degree @ 500 RPM

Intermediate Advance: 3-1/2 to 5-1/2 Degrees @ 750 RPM

Intermediate Advance: 4-1/2 to 6-1/2 Degrees @ 1,000 RPM

Intermediate Advance: 6-1/2 to 9 Degrees @ 1,500 RPM

Full Advance: 11-1/2 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 13 Degrees @ 20" Vacuum

Part #D3ZF-GA

Centrifugal Advance:

Advance Starts: 0 to 1 Degree @ 500 RPM

Intermediate Advance: 0 to 2-1/2 Degrees @ 750 RPM

Intermediate Advance: 2-1/4 to 4 Degrees @ 1,000 RPM

Intermediate Advance: 5-1/2 to 7-1/2 Degrees @ 1,500 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 12-1/2 Degrees @ 20" Vacuum

Brake Specifications, Passenger Cars, All Series

All Models:

Brake Drum Diameter: 10.00"

Wheel Cylinder Bore:

Front Disc: 3.100"

Rear: 1"

Master Cylinder Bore:

Disc Brakes: 1"

Drum Brakes: 1"

Power Brakes: 1"

Rear Axle, All Models:

Carrier Type: Removable

Ring Gear & Pinion Backlash: .008"-.012"

Nominal Pinion Locating Shim: .015" (With 8" Ring Gear: .022")

Pinion Bearing Preload:

With New Bearings:

With Seal: 17-27 Inch Pounds

With Used Bearings:

With Seal: 8-14 Inch Pounds

Differential Bearing Preload:

With New Bearings: .008"-.012"

With Used Bearings: .005"-.008"

Pinion Nut Torque:

With Collapsible Spacer: 170 Ft. Lbs.

With Solid Spacer: 200 Ft. Lbs.

Wheel Alignment Specifications:

All Models:

Caster: +3/4 Degrees

Camber:

Left: + 3/4 Degree

Right: + 3/4 Degree

Toe-In: 3/8"

Toe-Out on Turns:

Outer Wheel: 17.73 Degrees

Inner Wheel: 20 Degrees

Mercury Montego & Cyclone Carburetor Specifications:

Note: See 1973 Ford Motor Company Carburetors Data Base

Popular Options:

AM Radio; AM-FM Stereo Radio; Air Conditioning; Front Bumper Guards; Console; Electric Clock; Tinted Glass; Carpeted Cargo Area in Station Wagons; Left Remote Control Mirror; Dual Racing Mirrors; Power Front Disc Brakes; Power Door Locks; Power Windows; Power Bench Sear, 6-Way; Power Rear Tailgate Window for Station Wagons; Rear Facing 3rd Seat for Station Wagons; Vinyl Roof; High Back Bucket Seats; Hub Caps with Trim Rings; DeLuxe Wheel Covers; Luxury Wheel Covers; Interval Wipers; Cross Country Ride Package; Instrumentation Package; Various Engine & Transmission Options; Various Trim Options, and Much More.

1973 Mercury Historical Data:

Introduction date of the 1973 Mercury line was on September 22, 1972.

Total Mercury Production for the1973 model year was 556,907 including 156,805 Montegos.

1973 Mercury Colors &Codes:

1-C Black

1-G Silver

2-B Bright Red

2-C Red

2-L Bright Red

3-B Light Blue

3-D Medium Blue

3-K Silver Blue Glamour

3-M Silver Blamour

3-N Light Grabber Blue

3-P Light Grabber Blue

3-Q Pastel Blue

4-B Green Gold

4-C Ivy Glamour

4-N Medium Aqua

4-P Medium Green

4-Q Dark Green

4-S Light Green

5-A Light Pewter

5-H Ginger

5-J Ginger Glamour

5-L Tan

5-M Medium Copper

5-T Saddle Bronze

6-B Light Goldenrod

6-C Medium Goldenrod

6-D Yellow

6-E Medium Bright Yellow

6-F Gold Glamour

6-L Medium Gold

9-A White

9-C Special White

Promotional Models Available:

None

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