Cadillac Runabout B

Cadillac Runabout B
Engine Horizontal, with cylinder to the rear. One cylinder cast iron cylinder with copper water jacket
Bore & Stroke 5 x 5 in. (127 mm x 127 mm)
Displacement 98.2 cu. in. (1.609 liters)
Brake H.P. "Higher than advertised or calculated H.P." Advertised H.P.: 9
Engine description Two main bearings, mechanical valve lifters
Engine numbers 4200-5000 with EF (1904)
Carburetor Updraft mixer carburetor manufactured by Cadillac.

MODEL B CHASSIS Brakes Mechanical brakes on two wheels - contracting on inboard drums
Wheels 12 spoke wood wheels — 24 in.
Tires 30 x 3 Clincher
Wheelbase 76" (1.93 meters)
Overall length 9' 4" (2.37 meters)
Height 5' (1.27 meters)
Front/Rear Tread 56.5" (1.44 meters) [61 opt. (1.55 meters)]

MODEL B TECHNICAL INFORMATIONTransmission type Planetary transmission
Speeds Two Forward (3:1 and 1:1) and one reverse
Controls low — foot pedal, rev., high — lever to right
Clutch Low and reverse — bands, high — disc clutch.
Drive Chain drive
Differential Spur gear differential
Overall ratio 3.1:1 to 5:1 (Different combinations of 9 or 10 tooth driving sprocket with 31, 34, 38, 41, or 45 tooth driven sprocket gave ten possible ratios from 3.1:1 to 5:1. Lower ratios for runabout to be run on smooth, level roads to higher ratios for loaded Delivery to be run on rough, hilly roads. Instructions for changing sprockets were furnished to owners, but the change involved disassembly of the transmission and rear axle — definitely not a "quick-change" setup.