Description by Manufacturer ENGINE Engine Type V6 Bore x Stroke 3.63 x 3.00 in. (921 x 762 mm) Displacement 186 CID (3,046 cc) DIMENSIONS Shaft Length 25 in. (635 mm) Weight 528 lb. (240 kg) GENERAL Propshaft Horsepower 175 HP (131 kW) Full Throttle Operating Range 5000-6000 RPM Gear Ratio / Shift F-N-R Cooling Water-cooled with thermostat & pressure-controlled The Mercury Diesel Outboard is a diesel two-stroke designed for light duty commercial patrol boat applications. The EPA certified engine joins the U.S. Department of Defense spec diesel outboard Mercury Marine released in May 2015. The Mercury Diesel Outboard features exclusive spark ignition, direct fuel injected 2-stroke technology which enables it to run on readily available ultra-low sulfur diesel fuel. SPECIFICATIONS HP: 175 HP (131 kW) Engine type: V6 Displacement: 186 CID (3,046 cc) Displacement: 3.0 L Full throttle: 5000-6000 RPM Shaft length: 25 in. (635 mm) Gearcase ratio: 2.08:1 Dry weight *Lightest model available: 528 lbs (240 kg) Bore and stroke: 3.63 x 3.00 in (921 x 762 mm) Fuel system: 2-stage Direct Fuel Injection (DFI) Cooling system: Water-cooled with thermostat & pressure-controlled Gear shift: F-N-R Exhaust system: Through prop KEY FEATURES Available with a 25â?? (635 mm) center section and the 2:1 Fleet Master gearcase in both right-hand and left-hand rotation. Industry-exclusive spark ignition diesel engine. Glow plug ensures consistent, reliable cold starting. Commercial patrol boat models meet EPA emissions standards. Cylinder heads designed specifically for combusting diesel fuel. High performance cylinder liners for maximum horsepower and optimal engine running quality. Fuel/air mixture is injected into the combustion chamber at 95 psi for enhanced high rpm running quality.