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ENGINE INFORMATION |
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| MANUFACTURE | NAME COLOR | HP WEIGHT | IGNITION | VERT. HORIZ. | CY | CL | COOLING ING | YEAR |
|---|---|---|---|---|---|---|---|---|
| OIL CITY BOILER WORKS CO. Oil City, PA |
Oil City | NA | NA | Horiz. | NA | 1 | Tank | 1896 |
| OLDS GASOLINE ENG. WORKS Lansing, MI |
Olds | NA | Hot Tube | Vert. | NA | 1 | Tank | 1890 |
| OLIN GAS ENGINE CO. Buffalo, NY |
Ohio | 2-1/4 to 100 | NA | Horiz. | NA | 1 & 2 | Tank | 1896 |
| ORR AND SEMBOWER INC. Reading, PA |
O and S | NA | Mag. | Vert. | NA | 1 | Hopper | NA |
| OTIS MACHINE WORKS Rochester, NY |
Otis | 3 to 12 | NA | Vert. | NA | 1-4 | NA | NA |
| OTTAWA MFG. CO. Ottawa, KS |
Gibraltar | NA | Yes | Horiz. | NA | 1 | Hopper | NA |
| . | Ottawa | NA | Mag. | Horiz. | NA | 1 | Hopper | NA |
| OTTO GAS ENG. WORKS Philadelphia, PA> |
Otto | 4 to 15 | NA | Horiz | NA | 1 | Hopper | NA |
| . | Otto | NA | Hot Tube | Vert. Inv. | NA | 1 | Tank | 1870's |
| . | Otto | 1 to 150 | Hammer | Horiz. | NA | NA | Tank | 1912 |
| OWEN & CO. Chicago, IL |
OWEN | NA | NA | NA | NA | NA | NA | NA |
| P & O PLOW CO. Canton, IL |
Big 4 Pumper | NA | NA | NA | NA | NA | NA | NA |
| . | Big Chief | NA | NA | NA | NA | NA | NA | NA |
| . | P & O | NA | NA | NA | NA | NA | NA | NA |
| . | Parks Ball Bear. | NA | NA | NA | NA | NA | NA | NA |
| . | Wolverine-Job. | NA | NA | NA | NA | NA | NA | NA |
UNDER CONSTRUCTION - MORE TO COME