1990 Boston Whaler 31 Offshore

Custom build finished in 2022.
2018 Mercury 350HP Verado engines with 320 hours.
2020 new Simrad electronics added to both main and rear helm stations. Includes new radar, through hulls upgraded transducers with 3D structure scan, GPS compass, Auto Pilot, and VHF AID radios. FLIR camera.
2021 installed new level floor decking throughout the top deck. Plaed oversized 3" scupper drains (4 on each side) and modified gunwales with undermount utility boxes

Recent survey by Cake Mathers Marine Survey LLC in May 2025 shows a $685,000 replacement value


One of the strongest built and over engineered custom boats you will ever see. This 1990 31ft Custom Boston Whaler was completely redone in 2011. Designed and built by local Bellingham Marine Contractors; BJ Fiberglass, Rasmussen’s Marine, Clearwater Marine, Radar Marine Electronics, Tanner Manufacturing, Gilmore Upholstery, and Harris Rail Works all who are recognized in the industry for their quality work and expertise. Repowered with Twin 2018 Mercury Verado 350HP engines with only 321 hours, 360 gallons of fuel, Fiber reinforced plastic Fiberglass Deep V Hull, Electronic Propulsion, Hydraulic Sea Star steering, and Diesel Heat this custom-built Boston Whaler will get you out to any offshore fishing grounds you want to go to and was specifically designed for use in Alaska. You got to see this boat if you are looking for a quality fishing boat.

Included Options

• Outboard Engine Jack Plates


• Custom Built Trailer by Pederson – 35,000lb. Capacity


• Custom Deck Scupper Drain System with Enlarged 3” Scupper Drains


• Custom Cockpit Deck Floor – Cockpit Floor raised to be flush


• Custom Cockpit Gunwale. Riser extensions, Built in Bait Table Tray Receptacles


• Custom Oversized Stainless-Steel Rails, Bow Rails, Cockpit Rails, and Rooftop Rails


• Custom Cockpit Pilot Station, Hydraulic Steering, Electronic Engine Control, and Garmin Electronics


• Custom Built Pilothouse Enclosure


• Custom Fiberglass Hull Extension, Hull stretched from 27ft to 31 ft.


• Custom Built Lazarette Pump Room Bilge Compartment


• All tanks replaced in 2011 – 360 Gallon Fuel, 70 Gallon Water


• Upgraded Navigation Electronics, SIMRAD Chart plotter, Depth Sounder, Radar, and AIS.


• Equipped with SIMRAD Auto Piolet Steering


• Equipped with FLIR Infrared Video Camera


• Custom built Fish boxes Refrigeration and Separate freezer - SEA FREEZE


• Equipped with STIDD Helm Chairs and Aft Deck and Foredeck Floodlight

A recent Survey by Mather’s Marine Survey is available for serious buyers only. Private Viewing by Appointment Only!

Buy a classic offshore vessel with premium custom upgrades. This 1990 Boston Whaler 31 Offshore combines legendary Boston Whaler durability with extensive customizations for serious anglers and recreational boaters alike. Ideal for those seeking a reliable and robust boat for coastal cruising, fishing, or adventure in the Pacific Northwest.