1973 CHECKER

General Specifications:

Chasis:

Marathon:

Wheelbase: 120"

Overall Length: 203"

Tire Size: G78 X 15 Inches

Marathon DeLuxe

Wheelbase: 129"

Overall Length: 212"

Tire Size: G78 X 15 Inches

Body Data:

Checker Marathon Series:

6 Cylinder:

Model A12; 4 Door Sedan, 6 Passenger, Body #A12

Base Price: $4,716; Shipping Weight: 3,720 Pounds;

Model A12; 4 Door Station Wagon, 6 Passenger, Body #A12W

Base Price: $4,966; Shipping Weight: 3,925 Pounds;

8 Cylinder:

Model A12; 4 Door Sedan, 6 Passenger, Body #A12

Base Price: $4,825; Shipping Weight: 3,723 Pounds;

Model A12; 4 Door Station Wagon, 6 Passenger, Body #A12W

Base Price: $5,074; Shipping Weight: 3,916 Pounds;

Checker Marathon DeLuxe Series:

6 Cylinder:

Model A12; 4 Door Sedan, 8 Passenger, Body #A12E

Base Price: $5,394; Shipping Weight: 3,920 Pounds;

8 Cylinder:

Model A12; 4 Door Sedan, 8 Passenger, Body #A12E

Base Price: $5,503; Shipping Weight: 3,923 Pounds;

Engine Specifications:

6 Cylinder Engine, 250 Cu. In. 1 Barrel Carburetor, 100 HP:

Engine Type: Inline 6 Cylinder, Overhead Valve

Bore & Stroke: 3.875" X 3.53"

Engine Displacement: 250 Cu. In.

Compresssion Ratio: 8.25 to 1

Taxable Horsepower: 36.03

Horsepower: 100 @ 3,800 RPM

Torque: 175 Ft. Lbs. @ 1,600 RPM

Normal Oil Pressure: 40 Lbs/Sq. In

1Barrel Carburetor

8 Cylinder Engine-350 Cu. In., 145 HP:

Bore & Stroke: 4.001" X 3.48"

Engine Displacement: 350 Cu. In.

Compression Ratio: 8.50:1

Taxable Horsepower: 51.22

Horsepower: 145 @ 4,200 RPM

Torque: 255 Ft. Lbs @ 2,400 RPM

Normal Oil Pressure: 40 Lbs/Sq. In.

2 Barrel Carburetor

8 Cylinder Engine-350 Cu. In., 155 HP:

Bore & Stroke: 4.001" X 3.48"

Engine Displacement: 350 Cu. In.

Compression Ratio: 8.50:1

Taxable Horsepower: 51.22

Horsepower: 155 @ 4,000 RPM

Torque: 255 Ft. Lbs @ 2,400 RPM

Normal Oil Pressure: 40 Lbs/Sq. In

4 Barrel Carburetor.

Tune-Up Specifications:

6 Cylinder Engine:

Spark Plug Type: AC R46T

Sprk Plug Gap: .035"

Point Gap:

New Points: .019"

Used Points: .016"

Dwell Angle: 31 to 34 Degrees

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 600 RPM in Drive

8 Cylinder Engine:

Spark Plug Type: AC R44T

Sprk Plug Gap: .035"

Point Gap:

New Points: .019"

Used Points: .016"

Dwell Angle: 29 to 31 Degrees

Ignition Timing: 8 Degrees BTDC (Aerobus: 12 Degrees BTDC)

Engine Idle Speed:

Automatic Transmission: 600 RPM in Drive

Distributor Specifications:

Distributor #1110499

Advance Starts: 0 Degrees @ 550 RPM

Centrifugal Advance:

Full Advance: 11-1/2 Degrees @ 2,100 RPM

Vacuum Advance:

Vacuum to Start Plunger: 6"

Maximum Advance: 11 Degrees @ 14" Vacuum

Distributor #1112094

Advance Starts: 0 Degrees @ 600 RPM

Centrifugal Advance:

Full Advance: 7 Degrees @ 2,100 RPM

Vacuum Advance:

Vacuum to Start Plunger: 6"

Maximum Advance: 7-1/2 Degrees @ 14" Vacuum

Distributor #1112168

Advance Starts: 0 Degrees @ 500 RPM

Centrifugal Advance:

Intermediate Advance: 6 Degree @ 1,500 RPM

Full Advance: 9 Degrees @ 2,100 RPM

Vacuum Advance:

Vacuum to Start Plunger: 4"

Maximum Advance: 8 Degrees @ 7" Vacuum

Valve Specifications:

6 Cylinder Engines:

Valve Lash: Hydralic Lifters-1 Turn Down From Zero Lash

Valve Angles:

Seat: 46 Degrees

Face: 45 Degrees

Valve Spring Height, Installed: 1.66"

Valve Spring Pressure: 186 Lbs. @ 1.27"

Valve Stem Clearance:

Intake: .001" to .0027"

Exhaust: .0015" to .0032"

Valve Stem Diameter:

Intake: .3410" to .3417"

Exhaust: .3410" to .3417"

8 Cylinder Engines:

Valve Lash: Hydralic Lifters-1 Turn Down From Zero Lash

Valve Angles:

Seat: 46 Degrees

Face: 45 Degrees

Valve Spring Height, Installed: 1.66"

Valve Spring Pressure: 189 Lbs. @ 1.20"

Valve Stem Clearance:

Intake: .001" to .0027"

Exhaust: .001" to .0027"

Valve Stem Diameter:

Intake: .3410" to .3417"

Exhaust: .3410" to .3417"

Pistons, Pins, Rings, Crankshaft, & Bearing Specifications:

6 Cylinder Engine:

Piston Clearance: .0015" to .0025"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .9272"

Rod Bearings

Shaft Diameter: 1.9928" to 2.000"

Bearing Clearance: .0007" to .0027"

Main Bearings:

Shaft Diameter: 2.2983" to 2.2993"

Bearing Clearance: .0003" to .0029"

Thrust on Bearing #7

Shaft End Play: .002" to .006"

8 Cylinder Engine, 350 Cu. In.:

Piston Clearance: .0007" to .0017"

Ring End Gap:

Compression:

Top Ring: .010"

Bottom Ring: .013"

Oil: .015"

Wrist Pin Diameter: .9272"

Rod Bearings

Shaft Diameter: 2.099" to 2.100"

Bearing Clearance: .0013" to .0035"

Main Bearings:

Shaft Diameter:

#1: 2.4484" to 2.4493"

#2, 3, 4: 2.4481" to 2.4490"

#5: 2.4475" to 2.4488"

Bearing Clearance:

#1: .0008" to .0020"

#2, 3, 4: .0011" to .0023"

#5: .0017" to .0033"

Thrust on Bearing #5

Shaft End Play: .002" to .006"

Engine Tightening Specifications:

6 Cylinder Engine:

Spark Plugs: 15 Ft. Lbs

Cylinder Heat Bolts: 95 Ft. Lbs.

Intake Manifold:

End Bolts: 20 Ft. Lbs

Center Bolts: 30 Ft. Lbs.

Exhaust Manifold

End Bolts: 20 Ft. Lbs

Center Bolts: 30 Ft. Lbs'

Rocker Arm Cover: 45 Inch Lbs.

Connecting Rod Cap Bolts: 35 Ft. Lbs.

Main Bearing Cap Bolts: 65 Ft. Lbs.

Flywheel to Crankshaft: 60 Ft. Lbs.

Vibration Damper or Pulley: 60 Ft. Lbs.

8 Cylinder Engine, 350 Cu. In.:

Spark Plugs: 21 Ft. Lbs

Cylinder Heat Bolts: 65 Ft. Lbs.

Intake Manifold: 30 Ft. Lbs.

Exhaust Manifold:

Inside Bolts: 30 Ft. Lbs

Outside Bolts: 20 Ft. Lbs.

Rocker Arm Studs: 50 Ft. Lbs.

Rocker Arm Cover: 45 Inch Lbs.

Connecting Rod Cap Bolts: 45 Ft. Lbs.

Main Bearing Cap Bolts: 75 Ft. Lbs.

Flywheel to Crankshaft: 60 Ft. Lbs.

Vibration Damper or Pulley: 60 Ft. Lbs.

Alternator Specifications:

Make: Motorola

Model #: 8AL-2002

Amperes: 55

Volts: 15

Field Current: 1.8 to 2.4 Amperes, 12.6 Volts

Voltage Regulator #8RD2009

Regulator Test @ 120 Degrees F:

10 Amperes @ 2,000 RPM (Alternator) @ 13.4 to 13.9 Volts

Starting Motor Specifications:

6 Cylinder Engine:

Starter #1108365

Brush Spring Tension: 35 Ounces

Free Speed Test: 49-87 Amperes, 10.6 Volts @ 6,200-10,700 RPM

Resistance Test: 290-425 Amperes @ 4.2 Volts

Starter #1108480

Brush Spring Tension: 35 Ounces

Free Speed Test: 50-80 Amperes, 9 Volts @ 5,500-10,500 RPM

8 Cylinder Engine:

Starter #1108361

Brush Spring Tension: 35 Ounces

Free Speed Test: 65-100 Amperes, 10.6 Volts @ 3,600-4,100 RPM

Resistance Test: 300-6-360 Amperes @ 3.5 Volts

Starter #1108430

Brush Spring Tension: 35 Ounces

Free Speed Test: 65-95 Amperes, 9 Volts @ 7,500-10,500 RPM

Rear Axle Specifications:

Model #44

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .005" to .010"

Pinion Bearing Preload:

Method: Shims

New Bearings: 20 to 40 Inch Pounds

Used Bearings: 10 to 20 Inch Pounds

Differential Bearing Preload:

Method: Shims

New Bearings: .015 Inch Pounds

Used Bearings: .015 Inch Pounds

Model #62

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .005" to .009"

Pinion Bearing Preload:

Method: Shims

New Bearings: 20 to 40 Inch Pounds

Used Bearings: 10 to 20 Inch Pounds

Differential Bearing Preload:

Method: Shims

New Bearings: .015 Inch Pounds

Used Bearings: .015 Inch Pounds

Brake Specifications:

All Models except Aerobus:

Brake Drum Diameter: 11"

Wheel Cylinder Bore:

Front Disc: 2-15/16"

Front Drum: 1-1/8"

Rear Brum: 15/16"

Master Cylinder Bore:

Disc Brakes: 1-1/8"

Drum Brakes: 1"

Power Brakes: 1"

Aerobus:

Brake Drum Diameter: 11"

Wheel Cylinder Bore:

Front Drum: 1-1/8"

Rear Drum: 1"

Master Cylinder Bore:

Power Brakes: 1"

Capacities:

6 Cylinder Models:

Cooling System:

With Heater: 12 Quarts

With Air Conditioning: 12 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thermostat Opening: 195 Degrees

Fuel Tank: 21-1/2 Gallons

Engine Oil Refill with New Filter: 5 Quarts

Transmission:

Automatic Transmission: 8-1/2 Quarts

Rear Axle: 3 Pints

8 Cylinder Models, Marathon & Taxi:

Cooling System:

With Heater: 17 Quarts

With Air Conditioning: 17 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thermostat Opening: 195 Degrees

Fuel Tank: 21-1/2 Gallons

Engine Oil Refill with New Filter: 5 Quarts

Transmission:

Automatic Transmission: 8-1/2 Quarts

Rear Axle: 3 Pints

8 Cylinder Models, Aerobus:

Cooling System:

With Heater: 21 Quarts

With Air Conditioning: 21 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thermostat Opening: 195 Degrees

Fuel Tank: 23 Gallons

Engine Oil Refill with New Filter: 5 Quarts

Transmission:

Automatic Transmission: 8-1/2 Quarts

Rear Axle: 6 Pints

Wheel Alignment:

Marathon & Taxi:

Caster: + 2 Degrees

Camber:

Left: + 0 to 1 Degrees

Right: 0 to 1 Degrees

Toe In: 1/16" to 1/8"

Aerobus:

Caster: + 2 Degrees

Camber:

Left: + 1 to 2 Degrees

Right: 1 to 2 Degrees

Toe In: 1/8" to 3/16"

Rochester Carburetor Specifications:

1 Barrel:

Carburetor #: 7043014

Float Level: 1/4"

Metering Rod: .080"

Choke Rod: .245"

Vacuum Break: .300"

Unloader: .500"

Fast Idle: 1,800 RPM

2 Barrel:

Carburetor #: 7043114

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-7/16"

Vacuum Break: .130"

Choke Rod: .245"

Choke Unloader: .325"

4 Barrel:

Carburetor #7043202

Float Level: 1/4"

Pump Rod Hole: Inner

Fast Idle (Bench): 2 Turns

Choke Rod: .430"

Vacuum Break: .250"

Choke Unloader: .450"

1973 CHECKER

Popular Options:

Air Conditioning, Dual Air Conditioning, Whitewall Tires, Full Wheel Discs, Two-Tone Paint, Heavy Duty Shock Absorbers, Jump Seats, Vinyl top, Power Folding Rear Seat for Station Wagons, Power Tailgate for Station Wagons, Luggage Top Carrier for Station Wagons, Heavy Duty Battery, Limited Slip Differential, V-8 Engine.

1973 Checker Historical Data:

Automatic Transmission, Power Disc Brakes, and Power Steering were Standard Equipment;

1973 Checker Model Year introduction was on September 1, 1972.

Model Year Production:

900 Private Passenger Cars

5,000 Taxi Cabs

Copyright 2000, Custom Solutions & Services