Skirt Clearance .002"
Number of Piston Rings Compression, 2; Oil Control, 2
Width of Piston Rings Compression, 3/32"; Oil Control, 3/16"
Piston Ring Gap .009"-.011"
Lubricating System . Hudson Duo-flo Automatic
Oil Pump Type Oscillating Plunger
Oil Reservoir Capacity 5 Quarts
Capacity of Lubricating System 6 Quarts
Cooling System
Type Pressure Pump Circulation
Radiator Type Ribbon Cellular
Cooling System Capacity 12½ Quarts
Fan Belt "V" Type
Fuel System
Carburetor—Series 81 Make, Carter; Type, Single Down-Draft; Size, 1¼"
Series 82 Make, Carter; Type, Duplex Down-Draft; Size, 1"
Choke Control—Series 81 Manual
Heat Control—Series 81 Manual
Series 82 Automatic
Fuel Delivery Pump
Air Cleaner—Standard Oil Wetted—Intake Silencer Type
Air Cleaner—Optional, Extra Cost Oil Bath—Intake Silencer Type
Gasoline Tank Capacity 16½ Gallons
Starting, Lighting and Ignition
Make Autolite
Spark Control Automatic
Firing Order 1-5-3-6-2-4
Distributor Gap .020"
Spark Plug Type—Standard Head. Champion J-8—Metric
Spark Plug Type—Super Power Dome Head Champion H-10—Metric
Spark Plug Size 14 Mm.
Spark Plug Gap .032"
Generator Regulation—Series 81 Third Brush
Series 82 Third Brush and Voltage Regulator
Generator Charging Rate—
Series 81 (without radio)
Maximum Cold, 19 Amps.; Minimum Cold, 17 Amps.
Maximum Hot*, 18 Amps.; Minimum Hot*, 16 Amps.
Series 82** Maximum Cold, 32 Amps.; Minimum Cold, 29 Amps.
Maximum Hot*, 29 Amps.; Minimum Hot*, 26 Amps.
*After engine has run 15 to 20 minutes indoors.
**Use these settings for Series 81 with radio.
O W N E R' S M A N U A L 9