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MJM Yachts LLCBoston – Jan. 26, 2009  –  “Chunks of ice and snow on the foredeck fly off at 35 knots!” laughed MJM Yachts principal, Bob Johnstone, summing up sea trials for the company’s new 40z on Boston Harbor in January. This 40-foot, high-tech, IPS-powered, Down East design, combines seven desirable attributes of a modern power yacht: timeless styling; speed; fuel efficiency; ease-of-handling; quiet operation; seaworthiness and comfort. Three boats were sold during the trials in spite of the ice and snow. Of course, the reverse-cycle air conditioner kept the pilothouse nice and warm. The next 40z available is hull #7, which will be completed  August 1, 2009.

The 40z will make its world premier at two locations on the same weekend - the Miami International Boat Show (Feb. 12-16) and the New England Boat Show in Boston (Feb. 14-22).

This new Doug Zurn design is purpose-built to use half the fuel of similar length boats… with a projected 1.5 nmpg (17 gph) at 25 knots. That’s the same fuel consumption as a much smaller twin outboard center console 29-footer. Top speed during trials with a pair of Volvo D6 370 diesels was 39.2 knots with full tanks and 10 technicians aboard. The boat is quiet enough to hear a whisper at 25 knots (75 dbA) and dry – not a splash of water on the stern seat when carving turns at 30 knots.

“The only way to break the fuel barrier and still have a powerboat that cruises at 25 knots or more is to go stronger and lighter,” Johnstone explained. “You can’t get there using conventional hand lay-up building methods – or even new closed, or infusion, molding techniques that don’t produce substantial weight savings. MJM Yachts’ building partner, Boston BoatWorks uses an epoxy pre-preg/Kevlar/Eglass/Corcell/vacuum-bagged and oven-post-cured composite for exceptional strength-to-weight ratios. Dry weight of the 40z on launching was 16,000 lbs., yet it is the only known boat of its size to be strong and stable enough at such weight to be certified ‘Category A-Ocean’ by meeting stringent ISO CE Mark structural standards.”

Ease-of-handling around docks is very appealing to 40z’s target market. The 40z has Volvo’s new, computer-controlled IPS maneuvering system. Twin drives (either pods or I/Os) are independently controlled at idle speed by two-fingered operation of a single joystick. Conventional twin-engine controls take over at cruising speeds in open water.

Other unique features of the 40z are: (a) side-opening access doors at floating dock level, for ease of boarding or handling lines; (b) a beam no wider than 12’ and height under 13.5’ on a trailer so the boat can be trucked between seasonal residences at the same price as a 30 footer; (c) fully-opening windshields and roll-up side curtains for optimum ventilation in warm climates and unsurpassed sightlines; (d) berths for six and a truly separate shower; (e) megayacht single-level entertaining space encompassing both pilothouse and cockpit that’s more spacious than some 70 footers and (f) comfortable seating for 15 underway – seven in the cockpit and eight in the pilothouse.

40z Layout




40z Interior











40z in action









Bob Johnstone
MJM Yachts LLC
+1 (617) 723-3629
89 Pinckney St.
Boston MA 02114

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