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1986 Knowles 40'

$ 275,000

is a Knowles 40' 40 Custom Express listed for sale with United Yacht Broker Larry Dario. Larry can be reached at 1-401-954-1478 to answer any questions you may have on this boat. United Yacht Sales is a professional brokerage firm that has experience listing and selling all types of Saltwater Fishing and similar boats. With over 165 yacht brokers worldwide, we have the largest network of boat buyers and sellers in the industry.

"Fine Line" is a custom 40’ Billy Knowles cold-molded express sportfish. Considered by many to be one of the finest mid-sized express boats ever made, she was the inspiration for the 44 Garlington. She has just completed an extensive 3-Year open-checkbook refit by a team of the finest craftsman including new engines, gears, genset, electronic controls, hydraulics, tower, enclosure, electronics, refrigeration, teak, paint and bottom fairing. Benefiting from meticulous maintenance and a complete service history, she shows as new with low hours. "Fine Line" delivers that elusive combination of economy, speed, acceleration, and maneuverability. She is equally at home fishing the Bahamas, Sailfish Alley, or prowling the Canyons. Her soft, dry ride and seaworthy manners will impress the most discerning buyer. If you desire the one of the very best examples of a classic South Florida custom sportfishing yacht, look no further.


  • Price USD:$ 275,000
  • Builder:


  • Model:

    40 Custom Express

  • Location:

    Jupiter, Florida, United States

  • Type:

    Power Yacht

  • LOA: 40 ft 0 in
  • Display Length: 40 ft
  • Beam: 12' 0"
  • Yacht Category

    Saltwater Fishing

  • Water Capacity: 50 gals
  • Fuel Capacity: 310 gals
  • Engine Details: Yanmar 465 GTE
  • Engine 1: 2008 HRS 465.00 HP
  • Engine 2: 2008 HRS 465.00 HP
  • Engine Fuel: Diesel

The vessel is entered through the centerline companionway. To starboard there is a settee, convertible to a berth. Directly to port facing aft at eye level is the electrical cabinet including engine and genset starting panels. Forward to port is the enclosed head with sink and shower. Going forward is a stateroom with separate door.

Brightwork, Cutlass Bearing, Props Tuned, Fresh Bottom Paint, and Wax all done 10/2014.

Main Salon:

  • Varnished solid cherry sole
  • Settee convertible to a berth
  • LED TV with HDMI hook-up
  • LED AC/DC lighting
  • A/C
  • Stereo
  • (5) Large storage lockers
  • Large removable floor hatch for easy bilge access


  • Large extra deep stainless steel sink with H/C water
  • Gaggenau electric smooth top stove
  • Commercial microwave
  • Norcold stainless steel refrigerator
  • 4-Drawer cabinet
  • (4) Large storage lockers
  • Custom keeper box

Master Stateroom:

  • Queen centerline berth
  • Port and starboard cedar lined hanging lockers with storage under
  • Large removable hatches for easy bilge and anchor rope locker access
  • LED AC/DC lighting
  • A/C CruiseAir with digital control panel


  • Teak cockpit sole one inch thick, epoxy fastened and crowned for quick drainage
  • Teak covering boards one inch thick
  • (3) In-Deck hatches aft for easy access to bilge
  • Custom refrigerated In-Deck stainless steel fishbox with hatch and macerator
  • Custom 50+ gallon In-Deck live well
  • Rybovich full size teak fighting chair with teak ladder back
  • Custom bait prep station to port with storage under
  • Custom stainless steel freezer to starboard with drink box over
  • (6) Swivel rod holders
  • Fresh water washdown
  • Salt water washdown
  • Courtesy lighting
  • Deck lighting
  • 50 AMP electrical connection
  • Port and starboard in deck fuel fills
  • Palm Beach style teak helm pod with electronic controls
  • Complete instrumentation: tachometer, engine and gear temp, engine and gear oil pressure, engine water temp, voltage
  • Glendinning electronic engine control system with trolling valves
  • Stidd helm seat on pedestal
  • Port and starboard bench seating with storage under
  • Northstar 10” 6000i GPS
  • Northstar 952 GPS
  • Furuno 1942 MK II 10” 6KW 64NM 4’ open array radar
  • Furuno FCV-1100L 10”colorscope
  • Furuno NavPilot 500 autopilot
  • Si-Tex 110 SST LCD sea surface temp
  • Icom VHF
  • Standard VHF
  • Alarm panels, buzzers, and lights
  • Entire instrument panel raises electrically for ease of service
  • Helm cover
  • 3-Sided full polycarbonate enclosure
  • Fiberglass hardtop with sound attenuating headliner
  • (2) 12’ x 12” Bowmar ventilation ports 
  • Nor-Pro 9NY 8KW Genset (3 cylinder Yanmar), less than 200 hours
  • 50 AMP shore power
  • (6) Trojan AGM batteries in three banks
  • Xantrex 40 AMP battery charger
  • Galvanic isolator
  • Sintered bronze grounding plate
  • Grounding system with transom zinc
  • Yanmar GTE 465 HP diesel engines
  • Twin Disc MG-5075A 2:1 gears with Twin Disc KS 1195 oil coolers, trolling valves, Murphy gauges
  • Glendinning electronic control system with electronic trolling valves, 2 stations
  • Aquamet 22 shafts
  • PSS shaft seals
  • 24 x 32 4-Blade DQX Class one propellers
  • Stainless steel V-strut
  • Stainless steel rudders
  • Bronze scoop strainers for engines and genset
  • Sea Chest with scoop strainer for SWW, A/C and refrigeration coolant water
  • (2) x 160 gallon fuel tank with crossfeed and shut offs
  • Cruise-Air A/C
  • Gunnert bait and deck freezer and refrigeration
  • High water alarm
  • Engine room access through cockpit hatch and outboard through hatches in bridge lazarettes
  • Bridge deck easily removable for major service
  • Air vents in cockpit and bridge for salt free combustion air
  • Owner's Personal Property

Engine hours are as of the date of the original listing and are a representation of what the listing broker is told by the owner and/or actual reading of the engine hour meters. The broker cannot guarantee the true hours. It is the responsibility of the purchaser and/or his agent to verify engine hours, warranties implied or otherwise and major overhauls as well as all other representations noted on the listing brochure.

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.