MV Dirona Specifications and Features

Length overall (LOA)  41'5"/12.63m
Length rigged 43'7"/13.29m
Beam 13'1"/3.99m
Draft max 3'9"/1.14m
Bridge clearance 12'4"/3.76m
Bridge clearance max 15'5"/4.70m
Fuel capacity 220 gal/832L
Holding tank capacity 66 gal/249L
Water capacity 77 gal/291L plus 20 gal auxiliary

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Stateroom layout
The 4087 has excellent stateroom flexibility, sleeping up to eight in three private staterooms, plus the dinette converts to a fourth double bed. The master is aft, with an ensuite shower, separate head, and sink between with mirrored medicine cabinet. We prefer an aft master over a forward master. Aft masters tend to be more spacious and quieter, with less noise from water splashing against the hull.
     Forward are two staterooms, each with double beds and separate entries, that share a large hanging locker and a head with a built-in shower. This layout provides privacy between the master and guest staterooms and makes the boat an excellent choice for two cruising couples or those cruising with children.

Dirona is powered by twin 270HP B-series Cummins diesel engines. Two engines gives confidence in redundancy, good maneuverability, and increased speed when needed. The 270Bs are low-stressed members of the B-series family, which has a great service record, reasonable part prices, and a reputation for longevity (see We've not had a single engine failure.
          We use Dirona like a trawler, where long engine life is unremarkable, and run at displacements speeds for maximum engine life. We have logs of every gallon of fuel the engines have burned, and the average burn rate is just under 4 gallons per hour. In other words, in our usage these 270HP engines are averaging outputs of 80HP. Engine load is a better measure of usage and expected life then operating hours, but since hours are more commonly used, our 15,800 gallons per engine over 4,100 hours is comparable to 1,100 hours if run predominately at a typical 20-knot cruising speed (burning 13.5 gallons per hour per engine).
      The engines have been meticulously maintained by a knowledgeable and capable mechanic. A cleaner engine room would be difficult to find. All maintenance has been performed on or before schedule, and a complete service record is available for all work done on board. The engine room has good accessibility through a variety of points: the salon floor lifts off in two pieces, two hatches are in the mid stateroom, and a large hatch and removable steps are in the aft stateroom.
     Engine-related upgrades include a Groco oil change pump, allowing more effective oil changes, ISSPRO pyrometers and turbo boost gauges, Aetna 8402-B-SH digital tachometers gauges, engine exhaust temperature alarms, and prop de-pitching. See for details.

The 4087 has full lower and flybridge helms, both with good visibility, particularly from the upper helm for close quarters maneuvering. Dirona has a complete set of navigation electronics at both helms. Upgrades include a Standard Horizon VHF radio with external speaker and Raytheon L750 fishfinder at the lower helm, a 4kW Raytheon radar, an R70 Radar Display at the upper helm that repeats to lower helm, and an R70RC Radar/Chartplotter CRT display at the lower helm that repeats to the upper helm. Both helms have laptop mounts with GPS and 12-volt power source. The lower helm has a 19" display with remote keyboard for navigation and entertainment.
     Also installed is a Raymarine autopilot with S2 core pack, type 2 hydraulic pump, ST7000 controller at lower helm, and S100 wireless remote.

Rigged for year-round and longer-term cruising
Dirona has cruised the West Coast of Vancouver Island, the mid-coast inlets, extensively in Queen Charlotte Sound, and in the winter to Desolation Sound and as as far north as the Broughtons. This kind of cruising requires good equipment and self-sufficiency.
The on-board systems are highly-redundant and an ex
tensive spare parts inventory that includes windlass motor, raw water pump, alternator, furnace head, macerator pump, raw water pump and fresh water pump. Dirona carries an extra house propane tank, plus two additional tanks for the BBQ in an extra propane locker on the aft deck.
     Also installed is a Webasto 2010 45,000 BTU diesel furnace distributes heat throughout vessel. The furnace includes a hot-water heater for hot showers without running the engines or needing shore power.
     The 4087 has copious storage throughout in cupboards and accessible void spaces, plus a very large storage area in the cockpit lazarette. Also, the mid stateroom berth easily removes to convert the stateroom into a storage room. Large storage areas also are under all three stateroom berths.
For quiet time at anchor, Dirona has a high-capacity 1,125-amp-hour battery bank system made up of 10 golf-cart batteries and a Xantrex Freedom 30 3000-watt inverter. The engine charging system is tuned for this installation and will charge the bank in a couple of hours of run time. The system is also rigged for convenient portable power generation. Upgrades also include a digital voltage display, visible throughout the salon.  
The 4087 has a full up galley with that includes a Princess propane 3-burner range and oven, a Norcold 6.3 cu. ft (110v/12v) refrigerator with freezer, GE microwave oven and a double sink. Storage space is excellent in several cupboards and draws, plus a void space has been opened to create a large garbage cupboard.

Ground tackle

Dirona has a 66-pound Bruce main anchor, a 29-pound Guardian for a stern or tandem anchor, and a 25-pound Danforth-style as backup. The main anchor rode is 200' of 5/16" Hi Test chain with 300 feet of 5/8" line. The stern anchor rode is 300' of 5/8" line with 10' of chain. An additional backup rode of 300' of 5/8" line with 40' of chain also is included. The windlass is Lewmar Concept 1 with an upgraded higher-output motor over the standard install.
    Also included is a stern tie system with messenger line. The main line is 600 feet of 1/2-inch yellow polypropylene rope wound on a plastic reel. The messenger line is 300 feet of 3/16-inch polypropylene rope wound on a smaller spool. Each reel has a PVC pipe through the center with "T" ends. The PVC pipes act as spindles. The units slip onto the cockpit handrails, one above the other, and the reels spin to pay out or retract the line. Both spindles are removable to make the reels easier to stow.

Outdoor entertainment
The 4087 has multiple outdoor entertainment options at the large aft deck, flybridge, cockpit and the bow. A Kuuma 13,000-BTU BBQ, mounted on the aft deck, is included.

Other upgrades and equipment

Other upgrades and equipment include:

  • Transom shower
  • Mercury 8HP outboard engine with transom mount
  • Custom bookshelves in forward stateroom
  • Custom rugs throughout
  • Smoke and CO detectors
  • Teak coffee table in salon


Last updated: 2010.01.29


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Copyright 2012 Jennifer and James Hamilton