The Caterpillar C18 fire pump engine is an I-6, 4-Stroke-Cycle-Diesel engine with a 145.0 mm (5.7 in) bore, 183.0 mm (7.2 in) stroke and 18.1 L (1104.5 in³) displacement. The Caterpillar C18 fire pump engine is rated at 2100 RPM and rated at 800 BHP (597 bkW)....