builder has turned a muscular 47-footer with four outboard engines into a yacht-and it's brilliant ... not have to fiddle with four throttles; instead, engines are grouped to deliver their horsepower in perfect harmony (port and starboard), with only two throttles. The benefits of configuring four engines as two ...

and a molded-in overhead electronics box. While the engine electronic displays were mounted in this location, I ... and space enough to move outboard forward of the engines. The area is bathed in high-gloss Awlgrip ... . A lubricating oil-change system is plumbed to the engines, transmissions and generators and all can be tapped ...

: Those steep sections consume horsepower. (Twin big-block gas engines suit her, as do modern lightweight ... . It was at this juncture that Bertram's engineer, Lee Dana, and designer, Dave Napier, crafted a 54-foot design that would ... that is bolted securely to the main stringers and positioned aft of the engines in the machinery space. Unlike ...

to curved side windows, which in turn can be unbolted. Access to the engine compartment is through a deck hatch in the cockpit. There is just enough headroom for the engines, but it looks a bit ... to the rest of the engine compartment is adequate even though space is taken up by the tiny crew cabin to port ...

. There is a crew cabin tucked in just forward of the engine room, with access under the cockpit settee ... across its aft end. A hatch under this bed gives access to the engine compartment, while the whole ... introduces its 115, with a gas turbine engine, later this year. In the meantime, this 56 is a boat ...

goodies, including the electronic engine information displays. Covered console and cabinet space can ... size and configuration, access about the engines is good and the cockpit entryway is generous ... . The 3900's hull form began with a proven design that Tiara engineers tweaked to perfection. We ran ...