1986 Knowles 40 Express Description

This 1986 40ft Billy Knowles is a great example of a well-kept classic cold mold express sportfish. She was refit in 2011 and has since been well maintained and upgraded to encompass everything that a modern boat should represent. Don’t miss this opportunity to own a beautiful piece of sportfishing history.

1986 Knowles 40 Express Disclaimer

HMY Yacht Sales, Inc. is pleased to assist you in the purchase of this vessel. This boat is centrally listed by HMY Yacht Sales - Waterway Marina.

Big Mama Specifications

Name: Big Mama
Current Price: $385,000
Year: 1986
Engine Model: GTE
Length: 40 ft
Gross Weight: 17,000 lb
Hull Material: Fiberglass
State: FL
Draft: 3.42 ft
Fuel Capacity: 310 Gallons
Fuel Type: diesel
Engine Manufacturer: Yanmar
Beam: 12.5 ft
Max Speed: --
City: Stuart
Country: US

1986 Knowles 40 Express Vessel Overview

Recent Updates

Recent Updates

  • Feb 2021 - new water tank
  • July 2021 - replace radar
  • Oct 2021 - bottom paint
  • March/April 2022 - new Phasor generator
  • March/April 2022 - new fuel tanks/teak work
  • May 2022 - oil service
  • August 2022 - full engine service and heat exchangers/new turbos
  • Sept 2022 - new antennas
  • January 2023 - new sunshade and side curtains
  • April 2023 - oil service
  • Oct 2023 - new batteries


  • 2 - Garmin 7612’s
  • Garmin 4ft Open Array 12Kw Radar
  • 1 - Garmin 7610 (tower)
  • 2 - Garmin VHF 200
  • Garmin Autopilot
  • JL Audio Speakers
  • Fusion Head unit
  • Dinette
  • Fridge
  • Small 2 burner stovetop
  • A/C
  • Sink
  • Cabinet Storage
  • V berth with storage lockers on both sides
  • Head
  • Shower
  • Fighting chair
  • 2 - Cold boxes
  • Fresh water washdown
  • Raw water wash down
  • Sink/bait prep station
  • Tackle storage
  • Engine room access
  • Twin Yanmar GTE 465HP
  • Port -2200hrs
  • Starboard -2200hrs
  • Cruise - 27kts
  • Top end - 34kts
  • Phasor 9.5kW – 10hrs
  • LOA - 40’
  • Beam - 12’6’’
  • Draft - 3’5’’
  • Displacement - 17,000lbs
  • Fuel - 310gal
  • Water - 50gal

For more information, please contact Jack Flanigan at (772)-341-3186

HMY Yacht Sales

Since 1979, HMY Yacht Sales has been among the most trusted brokerage firms in the industry. For decades we have continued to instill confidence in our clients who choose to buy and sell yachts with us. Our goal is to provide you with the highest level of customer satisfaction combined with HMY’s renowned yachting expertise. When you choose your next brokerage firm, make sure to select the one that is the most experienced and knowledgeable in yacht sales. HMY’s expansive network of yacht sales professionals, support teams, yachting industry experts, and customers have been our recipe for success; and we’ve earned the trust of our clients from around the world. In 2022, HMY Yachts was recognized as the #1 North American Princess Yachts Dealer.

HMY Sales and Marketing Network

HMY Yachts is known for delivering sales results. We sell a pre-owned yacht on average every 12 hours. With accelerated sales results like this – there’s no better firm you can trust to sell your yacht. We invest heavily in online marketing and exposing your yacht to the right target buyer is one of HMY’s strengths. Plus, we activate and engage a high-performance network of brokers and buyers with walkthrough videos, virtual tours, MLS, email, magazines, social media, and digital campaigns. HMY’s accelerated yacht sales approach generates leads and sales at record levels. We connect buyers with our brokers quickly – to get your yacht sold. Call HMY today. We’ll put a world-class sales and marketing strategy together to sell your yacht so you can have peace of mind.


  • Established in 1979 and family-owned by Steve Moynihan
  • Recognized as one of the largest new and pre-owned yacht dealerships in the USA
  • HMY is on pace to sell over 500 pre-owned yachts, and over 150 outboard boats this year
  • HMY averages a yacht sale every 12 hours
  • 50+ yacht sales professionals at 13 sales locations from Ocean Reef, Florida to Newport, Rhode Island
  • New yachts for sale: Viking, Valhalla Boatworks, Princess, OKEAN, Two Oceans Power Catamarans,  and the all-new ECLIPSE model line
  • HMY was recently recognized as the #1 North American Princess Yachts Dealer in 2022
  • Dedicated Outboard Boating Center featuring premium fishing and cruising outboard boats
  • HMY has a dominant presence with sales offices located in high-profile marina locations
  • Premiere exhibitor at the largest boat shows in America
  • A global network of sportfish, motor yacht, superyacht, and charter customers
  • Sponsors of yachting, fishing, and showcase events throughout the year
  • HMY has an in-house Luxury Charter Vacations division serving global customers
  • HMY is well known for its industry-leading investment in marketing, advertising, and digital
  • HMY’s proven sales success has elevated HMY.com to be an elite yacht industry search engine

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