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MJM 34z Downeast

  • Boat Summary
  • Full Details

Boat Description

34z is ideal for a couple downsizing from larger power or sail:  Still large enough a yacht to seat 3 couples in protected comfort and for safe passage in offshore waves, yet light and narrow enough for unassisted docking and single-handed operation. This is truly a powerboat that will keep people boating together through shared adventures on almost a daily basis.

Thanks to a beam of less than 12 feet, height with radar under 13.5 feet loaded on a trailer, and 10,600 lbs. ½ load displacement:  34z is large enough for comfortable offshore passage-making and cruising -- yet readily transportable by road (with permits) between a winter residence south and a summer vacation cottage north.

Cruising 25 knots (29 mph) at 2800 rpm  with a 440 hp diesel, 34z burns only 12-14 gallons per hour while similar-size powerboats would be burning 20-30 gph.  In an era of rising fuel prices, that is remarkable.


A prop mounted close to a large rudder provides superior control when you need it most.  With bow and stern thruster, the 34z has comparable close-quarter maneuvering agility to the IPS, AXIUS and ZEUS computer systems.


Diesel mechanics say the 34z has the best engine access they’ve ever seen on any powerboat. The entire pilothouse deck rises 45 degrees on electric lifters.  Side panels permit full access to either side of the engine.  You can then step down from the cockpit to into either locker for checks or service. Wing fuel tanks are used to improve stability.  Full-sized 26” mountain bikes may be stored hidden away in these lockers. Mesh bags organize hoses, shorepower cords, life jackets, etc.  Deck drains capture rain and dew which then flow into the gray water system out through the transom rather than over the side through a gap in the toerail … streaking the topsides.  The only exposed teak on deck is on the optional Adirondack stern seat which is protected by a snap-on vinyl cover when not in use.

Boat Details
Beam 11 ftMax Draft 2 ft 6 in
Dry Weight 10600 lbHull Material Fiberglass
Hull Shape Deep VeeFuel Capacity 150 gal
Length at Waterline 31 ft 4 inLength on Deck 34 ft
Number of Heads 1Water Capacity 68 gal
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Detailed Specs
Max Bridge Clearance 9 ft 6 inNumber of Berths 4

Performance Features

  • Yanmar 6LY3 380-480 HP 6 cylinder diesel
  • Epoxy unidirectional tri-axial kevlar and S-glass hull and deck
  • Dual bow and stern thrusters
  • 33 knots top speed
  • Most fuel-efficient - an environmentally friendly 1.8-2.0 nmpg
  • Comfortable V-berth interiors