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1993 Knowles 37 Custom Description

"Ma Sheila" is a custom 1993 Billy Knowles 37' Walkaround refit in 2019. "Ma Sheila" comes equipped with a Seakeeper and is considered by many to be one of the finest mid-sized walkaround fishing boats ever built. This Knowles 35' completed an initial refit in 2015 including Cummins factory reconditioned QSB 380 HP engines with electronic controls. In order to make her a light tackle world record chasing machine, "Ma Sheila" had a complete bow to stern refit in 2019 including a Vetus bow thruster. The walkaround combined with the 488 ft./lbs torque bow thruster will spin this 1993 Billy Knowles 37' in a 360-degree circle in seconds, making it almost impossible for a fish to get away!


  • Removed all systems from boat
  • Removed engines
  • Installed Seakeeper
  • New generator
  • New fuel tanks
  • New running gear
  • New electronics
  • New cushions
  • New deck in cockpit
  • Designed new marine exhaust system
  • Painted engine room
  • Painted engines
  • Painted entire boat
  • New wiring
  • New hoses, pumps
  • New Vetus bow thruster (W220-488 fl/lbs. torque)
  • New EZ2CY enclosure
  • New Bausch tower
  • This is a completely new boat at a fraction of a new build price.

Ma Sheila Specifications Add to Favorites

Name: Ma Sheila
Current Price: $699,000
Year: 1993
Engine Model: QSB 5.9
Length: 37 ft
Gross Weight: 12000 lbs
Hull Material: Fiberglass
State: FL
Draft: 3'
Fuel Capacity: 415 Gallons
Fuel Type: Diesel
Engine Manufacturer: Cummins
Beam: 12'
Max Speed: 34 KN
City: Stuart
Country: US

1993 Knowles 37 Custom Vessel Overview

Vessel Details


  • Fishbox with pumpout
  • Fresh and saltwater washdown
  • Hooker electric livewell pump
  • Release Marine rocket launcher
  • Under gunnel lighting- red, white, blue (Lumitec)
  • 12V outlets for LP Hubbell

Helm/ Bridgedeck

  • Dual bench seating
  • Ice chipper (Neville Marine, Stuart)
  • Drink box storage
  • Leaning helm station
  • SeaDek flooring
  • (8) Lumitec LED overhead lighting (red, white, blue) and 2 on top shining up
  • EZ2CY hard enclosure (C-Worthy)
  • Custom C-Worthy cushions
  • Lower helm with Palm Beach single lever controls with bow thruster switches on handles
  • Simrad Go12 engine control monitoring
  • Garmin 8622 X 5V GPS, depth, chirp sounder, 25 Kw radar
  • Glendenning electronic controls
  • Lenco trim tabs
  • Icom VHF
  • JL Audio
  • Miya Epoch electric teaser reels with sliding cover.


  • New custom Bausch tower (2019) Heavy duty pipe
  • 11 rodholders
  • Rupp outriggers
  • Hardtop
  • Drink holders
  • SeaDek on tower floor
  • Aft floods 2 x 12" Ridgid light bars
  • Forward spotlight
  • (2) Garmin hardwired camera mounts
  • Glendenning electronic controls
  • Garmin GPS Map 2 x 12" displays
  • Icom VHF
  • Lumitec LED lighting (red, white, blue)
  • Seakeeper control
  • Bow thruster control
  • Lenco trimtab controls
  • Simrad autopilot
  • Digital antennas
  • JL audio


  • Electrical panel by Blue Seas
  • Air Conditioning
  • Refrigerator
  • Sink
  • Custom butcher block counter
  • Queen bunk
  • Rod hanging storage above bunk
  • Enclosed head and shower (Sealand)
  • SeaDek flooring


  • Under gunnel lighting 18 Lumitec LEDs (red, white, blue)
  • Flush mounted cleats
  • Murray Brothers fighting chair
  • New rubrail
  • 24 Lee rodholders in covering boards
  • Bow cushion on bench seat forward
  • Hubbell 12V in bow locker
  • Fortress anchor

Electronics 2019

  • Garmin GPS 8622 Plotter, chirp sounder with Airmar 599C low-high-wide transducer
  • Garmin 25 Kw radar with AIS (2021)
  • Simrad autopilot and engine monitoring
  • JL Audio package with 3 JL Audio amps
  • (2) Icom VHF radios with digital antennas
  • Seakeeper 5
  • Atlastrax tracker



  • Cummins QSB 380 HP engines (2) 900 hours
  • 1 MPG cruise
  • Northern Lights 9Kw generator (2019) 1120 hours
  • Seakeeper 5 (2018) with stainless steel mounting cradle
  • Twin disc transmissions (Port replaced 2020)
  • Vetus Florida bow thruster (W220-488 ft lbs. torque)
  • 12V fresh water
  • 12V saltwater
  • Racor filters (new)
  • 30 Amp service
  • Marine exhausts (2019)
  • AGM batteries
  • Rule bilge pumps
  • Lenco trim tabs
  • Underwater lights
  • Jabsco diaphram

Running Gear

  • New props (2019)
  • New rudders (2019)
  • 1.5 inch shafts (checked 2019)
  • All new thru-hulls (2019)
  • New trim tabs (2019)

Engine Room

  • 2019 complete refit
  • Engines removed from boat and painted
  • Engine room painted
  • New wiring, plumbing, thru-hull fittings, hoses, insulation
  • All pumps new
  • Generator installed
  • Seakeeper installed
  • Marine exhaust- New risers, elbows and mufflers for both engines and generator

Mechanical Disclaimer

Engine and generator 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.

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