Westport Motor Yachts are renowned for their quality, performance, and value. Mary Kathlene is a 40-meter flybridge motor yacht launched in 1989, featuring five staterooms and a full-beam main-deck owner’s suite. Her 2022/2023 major refit included interior improvements, updated electronics, refreshed mechanical systems, additional upgrades, and main engine rebuilds. A subsequent 2025/2026 yard period included a fresh bottom job, PropSpeed application, multiple mechanical services, and preventative maintenance. Powered by twin 1,500-hp Caterpillar 3508 engines, she cruises at approximately 14 knots. With her proven Westport pedigree and extensive recent work, Mary Kathlene offers comfort, capability, and value. Located in Fort Lauderdale, Florida, she is available for immediate inspection.

Five-Stateroom Layout

The accommodation plan provides five guest staterooms, led by a full-beam owner's suite positioned on the main deck. This arrangement gives the owner a private, generously proportioned retreat while keeping primary living accommodations on one level. Four additional guest staterooms complete the layout,  supporting extended cruising with family and friends. 

With 11 heads reported in the listing, the yacht is arranged to support guest, crew, and day-use needs throughout the vessel.

Prospective buyers should confirm the precise berth configuration and designation of each head during inspection.

Main Salon and Dining

The main-deck interior benefits from the yacht's wide beam and broad window line, creating a spacious setting for relaxation and entertaining. The salon features multiple seating areas and an entertainment component, while the adjoining dining area provides a dedicated space for meals and more formal gatherings.

The interior refit referenced in the listing gives the living areas an updated, contemporary presentation while retaining the generous proportions associated with a 139-foot Westport platform.

Galley and Service Areas

The galley is equipped for extended operation and includes an oven, microwave oven, refrigerator, deep freezer, dishwasher, and hot-water service. Its appliance package supports everyday cruising as well as service for larger groups. A washing machine and dedicated utility spaces assist with housekeeping during longer stays aboard.

Climate and Dometic Systems

Air conditioning and heating provide climate control throughout the interior. Additional domestic equipment includes a fresh-water maker, marine heads, hot-water system, sea-water pump, and battery charger. These systems contribute to the yacht's ability to operate comfortably away from the dock for extended periods.

• 3 of 4 chillers have been replaced 2023-2025
• All air handlers upgraded in 2022
• System received a full blue star cleaning, late 2025

Main Propulsion

Power is provided by twin Caterpillar 3508 diesel engines, each rated at 1,500 horsepower. Together, the engines deliver a combined listed output of 3,000 horsepower. The source listing describes the yacht as having fresh mechanicals; service history, overhaul scope, engine hours, and supporting records should be reviewed directly with the listing broker and confirmed by survey.

• August 2025: Service to turbos, after coolers, and valve calibration was carried out by Pantropic on both Main Engines.
• Main Engines Overhauled in 2023.
• Engine Hours SMOH: 1500 hours

Handling and Shipboard Support

A bow thruster assists with low-speed maneuvering and docking. Supporting machinery includes an electric bilge pump, air compressor, battery charger, shore-power inlet, and generator. The combination is intended to support routine shipboard operations both underway and alongside.

Generator Hours:

• Port: 15975
• Starboard: 15304; new generator backend was rebuilt at 14200

Navigation and Communication

The helm equipment listed includes radar, depth sounder, GPS, chart plotter, navigation center, computer, autopilot, compass, and VHF radio. These systems provide the principal tools for route planning, position awareness, communications, and vessel control. Because the listing notes updated electronics without identifying individual makes or model years, all equipment should be powered up and function-tested during inspection.

Entertainment Electronics

Television, radio, and cockpit speakers provide entertainment coverage in interior and exterior guest areas. The precise distribution, control interfaces, and equipment specifications should be confirmed on board.

Exterior Decks

The yacht's flybridge and exterior deck areas provide multiple locations for open-air relaxation, dining, and entertaining. Teak decking in the cockpit adds a traditional yachting finish, while cockpit cushions and a cockpit table support casual seating and alfresco use.

A cockpit shower and swimming ladder make water access more convenient when swimming or returning from the tender. The broad exterior spaces also support movement around the vessel during docking and day-to-day deck operations.

Broker's Perspective

This 139-foot Westport brings together a recognized American builder, substantial interior volume, a desirable main-deck owner's suite, capable Caterpillar power, and an extensive selection of cruising equipment. Her scale and five-stateroom arrangement make her particularly relevant to buyers seeking generous accommodations and multiple social areas in a proven flybridge motor-yacht platform.

Mary Kathlene is available for viewing in Fort Lauderdale, Florida.

Exclusions

Exclusions include, but are not limited to, the owner's personal belongings. A detailed list of exclusions is to be provided at the time of sale upon receipt of a written request from the buyer.

***EIAPP Certificated do not convey with this sale.***

Disclaimer

The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice.