New diesel jetdrive from Cummins MerCruiser

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Cummins MerCruiser Diesel is offering a new diesel jetdrive package for both recreational and light commercial use.

Cummins MerCruiser Diesel is offering a new diesel jetdrive package for both recreational and light commercial use.

The system uses standard MerCruiser diesel sterndrive engines from 120 hp to 250 hp, suitable for single-engine applications to 26 feet and twin-engine applications to 33 feet, according to the company. The 1.7-liter MJ 120 jet, the model for 120-hp engines, was the first available. The remaining models are expected to be available later this year. Cummins MerCruiser says the drive system will be available as an option through boatbuilders and their dealers for vessels built to accommodate the jetdrive system.

The drives feature a jet with a high-volume 10-inch axial flow pump. At the top end of the model spectrum, the 4.2-liter MJ 250 can pump 120 gallons per second, delivering performance the company compares to sterndrives.

By integrating the gearbox with the jet housing, designers were able to create a close coupling and save 24 inches lengthwise in boat space, according to the company. As a result, no jackshaft is required.

The drive is operated by a single-lever control for throttle and shift, with a hydraulic reverse bucket for improved handling and emergency stopping. The unit incorporates a modified MerCruiser power steering cylinder to raise and lower the bucket, which the company says provides a cost-effective hydraulic shift typically found in higher horsepower jetdrives.

Cummins MerCruiser Diesel, a joint venture between Cummins and Mercury Marine, is based in Charleston, S.C. Phone: (843) 745-1586.

www.cmd marine.com