Monster new engine from Mercury Racing
New V8 sterndrive rated at 1750hp billed as most powerful engine.
Mercury Racing has released what it claims is its most powerful engine to date, the new QC4v 1750 Competition sterndrive engine which was unveiled at the recent Miami international Boat Show.
Designed, developed and manufactured in-house by Mercury Racing, the 9.0 litre V8 engine is specified to produce 1750hp at 6,800rpm. It features Mercury Racing’s exclusive aluminium four-valve cylinder heads and dual overhead camshaft (QC4v) valve train.
Other features include new turbochargers to provide greater airflow for enhanced power and torque, Digital Throttle & Shift (DTS) with one-touch Smart Start and automatic throttle synchronisation, and Zero Effort Digital controls for precise driver control.
In order to keep the engine cool, oil and glycol in the closed cooling system are routed around the engine via a series of tubes which are encapsulated in a casting filled with sea/river water which serves as a coolant. The heat exchanger also provides for a higher sea water flow rate for enhanced cooling.
Mercury Racing’s proprietary pulse-separated exhaust tuning keeps the turbos “spooled up,” virtually eliminating throttle lag and low-end torque deficit.
The Propulsion Control Module (PCM), featuring Mercury Racing developed software, features a boost control valve that continuously adjusts the amount of turbocharger boost needed to provide consistent horsepower.
The PCM also enables fuel and spark timing to be controlled independently for each cylinder, thereby enhancing engine running quality, performance, fuel economy and durability. The use of eight independent ignition coils, one per cylinder, helps eliminate spark plug fouling.
Mercury Racing’s exclusive Engine Guardian System also monitors engine functions to forewarn of possible problems that could lead to engine damage. In the event of a potential problem, the system is designed to reduce power to a maximum, safe level that allows the boater to continue operation with lower risk of engine damage.
The drive and hydraulic transmission are specifically designed to handle the 1750’s high torque and power levels and are combined with Mercury Racing’s Pro Finish five and six blade CNC sterndrive propellers.