BY DAVE HAGEN AND MIKE CARUSO
In 2010, Mercury Racing revolutionized the recreational sport boat industry with the release of the quad cams four valve (QC4v) 1100 and 1350 sterndrive engine packages. Now, in 2013 the new QC4v 1650 Race engine is set to again raise the bar and capture checkered flags in the sport of offshore powerboat racing.
The new 1650 is based on the same four valve technology with quad cams and dry sump efficiency as its consumer siblings. Larger turbochargers, packed with an improved compressor wheel design, provide greater airflow for enhanced power and torque. The 9.0 liter quad cam four valve (QC4v) cylinder block and head design, combined with SmartCraft Digital Throttle & Shift (DTS), provides big power with luxury-car-like drivability. The DTS system also features one-touch Smart Start and automatic throttle synchronization, as well as shadow mode for triple or quad engine applications (where two throttle levers operate all engines). Zero Effort Digital controls provide an intuitive control experience - precisely signaling driver intent to the potent powerhouses.
When the 1350 was being developed a few years ago, it didn't take long to realize a larger, stronger drive was needed to handle the massive torque capabilities of the QC4v platform. Thankfully, the new drive was built to take that on and then some. The M8 drive and hydraulic transmission are designed to handle the 1650's high torque and power levels - as well as endure treacherous offshore duty cycles. At the same time, the transmission, designed specifically for SmartCraft DTS, delivers smooth and consistent shifts.