Cadillac history 1907

1907 CADILLAC MODEL M

Model M
Engine	Single cylinder, horizontal, with cylinder to rear, cast iron cylinder with copper water jacket, two main bearings, mechanical valve lifters
Bore & Stroke	5" x 5"
Displacement	98.2 cu. in.
Brake H.P.	10 hp
Engine description	Two main bearings, mechanical valve lifters
Carburetor	Updraft mixer manufactured by Cadillac
Transmission	Planetary
Gears	3 forward, 1 reverse
Gear ratios	Low: 3:1; High: 1:1; Reverse: 3:1
Drive	Chain
Differential	Spur gear
Overall ratio	3.1:1 to 5:1 depending on drivetrain option

Tires (touring)	30 x 3.5
Tires (other bodies)	32 x 3.5
Wheelbase	76"
Overall length	9' 7"
Height	5' 2"
Front/Rear Tread	56" (61" opt)
Brakes	Mechanical on two wheels contracting on inboard drums
Wheels	23" wood with 12 spokes

Drivetrain Options
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 cars to be run on rough, hilly roads. Instructions for chainging sprockets were furnished to owners, but the change involved disassembly of the transmission and rear axle — definitely not a "quick-change" set-up

Drivetrain Options

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 cars to be run on rough, hilly roads.
Instructions for chainging sprockets were furnished to owners, but the change involved disassembly of the transmission and rear axle — definitely not a "quick-change" set-up

Notes	Chassis same as Model K except for two inch longer wheelbase. Additional body styles offered. Straight line Touring again available. Folding Tonneau new. Tonneau folds to look like runabout but this body not available on shorter Model K chassis. First production one cylinder Coupe offered. Serial numbers on plate on rear of body (with engine number). Engine numbers were stamped in three places on the crankcase On the top of the crankcase at the right edge of cylinder flange, near water outlet On the top surface of the crankcase at the left, front mounting leg On a plate on the rear of body Blank spaces on the patent plate were for additional patent dates, not engine or serial number Serial number: 21851 to 22150 and 24075 to 24350

Notes

Chassis same as Model K except for two inch longer wheelbase.
Additional body styles offered.
Straight line Touring again available.
Folding Tonneau new.
Tonneau folds to look like runabout but this body not available on shorter Model K chassis.
First production one cylinder Coupe offered.
Serial numbers on plate on rear of body (with engine number).
Engine numbers were stamped in three places on the crankcase
- On the top of the crankcase at the right edge of cylinder flange, near water outlet
- On the top surface of the crankcase at the left, front mounting leg
On a plate on the rear of body
Blank spaces on the patent plate were for additional patent dates, not engine or serial number
Serial number: 21851 to 22150 and 24075 to 24350

OPTIONS
Bulb horn Lights Rubber cloth Cape Cart top for Touring ($100.00)

HISTORICAL
Introduced 1906. Calendar year sales and production: 2350 with models M, K. S, T. Model year sales and production, same.

NEXT: History of the 1907 Cadillac Model G NEXT: History of the 1907 Cadillac Model H NEXT: History of the 1907 Cadillac Model K NEXT: History of the 1907 Cadillac Model M NEXT: Overview of the History of the 1907 Cadillac NEXT: History of the 1908 Cadillac

May 11, 2000; March 8/03