Mechanical - Engineering - Plumbing

The Island Packet 439 is engineered for reliability and comfort with a thoughtfully designed systems suite. Deluxe electrical panels provide clear, centralized control of AC and DC power, supported by a 30-amp shore power system with full GFCI protection, a 5000-peak inverter/charger, and a fail-safe galvanic isolator. Pre-wiring for essential upgrades—including windlass, bow thruster, fans, speakers, and VHF—ensures flexibility for future installations.

  • Yanmar® C Engine Panel with temperature and oil pressure gauges.
  • Engine access from removable front and rear panels, hinged side opening doors. Pre-plumbed for electric oil change system.
  • Extensive sound-control with premium lead-lined insulation, gasketed access doors and panels.
  • Five (5) premium Lifeline 31 XT AGM batteries, 125 ah each, dedicated to house, plus one (1) Lifeline 27 AGM, 100ah, dedicated to engine start.
  • Momentary parallel switch in cockpit for emergency starting.

At the helm, an advanced engine monitoring system offers confidence under way, while LED navigation lights and a robust grounding/bonding system maximize safety offshore. Below deck, tanks are strategically placed for balance and efficiency: a 160-gallon baffled aluminum fuel tank, a 260-gallon ThermoCure™ fresh water tank, and a 55-gallon fiberglass holding tank with remote monitoring.

Systems are supported by premium components, from a heavy-duty Rule® bilge pump with electronic switch and alarm to UL-listed bronze seacocks on all thru-hulls. Hot and cold pressurized water is delivered throughout, with an insulated eleven-gallon water heater and dedicated sump system for showers and sinks. An LPG system with dual shutoffs and room for an extra tank rounds out a comprehensive design that blends technical excellence with the luxury of dependable comfort at sea.

80HP Yanmar® 4JH80 turbo diesel

80HP Yanmar® 4JH80 turbo diesel engine, fresh water cooled, rubber isolation mounts on reinforced fiberglass bed with integral oil pan, mechanical fuel pump, 110 amp Balmar® alternator and digital DuoCharge controller. A 3-bladed fixed prop (feathering prop optional), Yanmar® fuel filter with water separator mounted for easy access(Dual Racor® fuel filter system optional). Jacketed fuel lines with swedged and threaded fittings, intake strainer.

  • - Pressure water system with hot and cold service to galley, head and cockpit shower. UL® listed eleven (11) gallon water heater with engine heat exchanger, insulated hot water hoses throughout. Dedicated head, sink/shower drain sump with strainer.
  • - LPG system with 10 pound aluminum tank in self-draining storage compartment with gasketed, lockable lid, remote solenoid, dual safety shutoffs and gauge; room for extra tank.
  • - Fuel, water and holding tanks below cabin sole maximize storage and stability and minimize trim changes with varying tank fluid levels.
  • - Fuel tank(160 gallons) constructed of welded, baffled heavy gauge marine-grade aluminum (5052-H32) with shut off valve, s/s deck fill, tank mounted mechanical gauge. Pre-plumbed with second pickup/return for addition of generator and/or heater system.
  • - ThermoCure™ fresh water tank(260 gallons) constructed of infusion molded fiberglass using FDA approved vinylester resins, baffles, s/s deck fill, electronic remote tank level gauge.
  • - Fail-safe galvanic isolator with status panel.
  • - Engine instrument panel with tachometer, hour meter and engine monitoring system near helm.
  • - Electrical DC grounding/bonding system for rig and all underwater metals.
  • - Deluxe electrical panels with separate battery switch, gauges and breakers for AC and DC systems, battery test system, indicator lights and controls for electric pumps, LPG solenoid control and battery charger.
  • - 30 amp dockside AC power system with ELTI ground fault inlet protection breaker and one (1) 50-foot shore power cord. Numerous outlets, all with GFCI protection.
  • - Inverter 5000 peak/100 amp charger
  • - Infusion molded fiberglass holding tank(55 gallons) with baffles, s/s deck pump out fitting, electronic remote tank level gauge.
  • - Heavy-duty Rule® 3700 electric bilge pump with auto control and premium WaterWitch® electronic pump switch. BilgeAlert® high water bilge alarm with remote alarm panel at helm.
  • - UL listed bronze, thru-bolted, flanged seacocks on all thru hulls below waterline; ball valves on thru-hulls in boot stripe.
  • - LED navigation lights including masthead anchor light and foredeck/steaming light on mast.
  • - Pre-wired for anchor windlass installation, bow thruster cables, fan and speaker wires throughout interior, VHF cable in mast and from mast step to nav area; messengers pre-run for pulling additional wire.