SIR ISAAC Boat for Sale

49' Custom | 1984 | $500,000

Port Townsend, WA

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Last updated Dec 4, 2024

Sir Isaac Boat | 49' Custom 1984

This spectacular vessel, ‘Sir Isaac’, a 49’ Cold-Molded Cruising Schooner, is in excellent condition and received a major restoration from 2006-2016 by the current and long-time owners who not only maintain the vessel to the utmost degree but also sail her regularly, both cruising and racing, and have found her to be very capable of doing both well. The vessel is equipped with top quality systems and redundancies to ensure safe and capable operation whether going around the marks or heading to Sea.

This vessel must be seen to appreciate the quality and craftsmanship that 'Sir Isaac' exudes. She's beautiful, fast, in pristine condition and constantly tended to by her dedicated owners. 'Sir Isaac' is the ideal boat for comfortable short or long-range cruising or for adrenaline pumping mark rounding's on the race course! 'Sir Isaac' leaves a wake of excitement and admiration where ever she sails!

Moorage transferable in the Port Townsend Boat Haven, upon Harbormaster approval!

‘Sir Isaac’ was designed by naval architect Chuck Burns and built by C&B Marine in Santa Cruz, CA. The boat was designed for Double-Handed Ocean Racing. The current owners have owned ‘Sir Isaac’ for 23 years. In 2006 the boat was hauled out for a 10 year Restoration; re-launching in 2016 (See

Restoration details below).

Last Haul and Bottom Paint: April 2024

Last Engine Service: August 2024

Zincs Replaced: September 2024

Cutlass Bearing Replaced: April 2024

Maintenance:

‘Sir Isaac’ is hauled annually for bottom painting and inspection. No project is every left in waiting with her proactive owners routinely following a strict preventative maintenance schedule on the boat throughout their ownership.

Layout:

Starting forward the Fore Peak is a Water Tight Compartment and Chain Locker. The bottom of the Chain Locker is lined with UHMW to protect the hull from the chain.

Aft of the Chain Locker is the V-Berth. At 6’9” it is a very comfortable space and the Double Berth for Cruising.

Aft to port is the Head, with a Hanging Locker to starboard.

The Main Salon is next aft with port and starboard Settees and a Center Table and Island Galley. The Engine is located under the Island. Aft and to starboard is the Navigation Station.

Aft of the Main Salon Bulkhead is a Grated Area for wet gear. Port and starboard of the companionway are Quarter Berths and Sail Stowage. Starboard side aft lower is the HVAC space. The cockpit is above the Quarter Berths. Aft of the Cockpit is the Lazarette.

The Cabin Sole is Teak and Holly. Each removable Cabin Sole section latches into place.

2016 Restoration:

Keel Removed, Inspected and New Keel Bolts Installed
Entire Deck Replaced
New Trunk Cabin
New Cockpit
Hydraulic System for Rig and Control Panel Inspected, Serviced and Upgraded
New Fore Mast
New Standing Rigging
New Halyards
New Lewmar Ocean Hatches
New Lifelines
New (2) 30 Gallon Stainless Steel Water Tanks, adding to 100 Gallon Keel Tank
New 60 Gallon Aluminum Fuel Tank
New Plywood and Epoxy Holding Tank
New Electrical Wiring
New Heating Unit
And More (See ‘Other Details’ for Full Equipment List)

Most Recent Upgrades:

New Hardtop Dodger (Easily Removable) with Solar System (2020)
New Datrex 4-Person Life Raft (2021)
300’ ACCO G43 HT Galvanized Anchor Chain (2024)
New Carbon Fiber Rudder, designed by Paul Bieker (2019)
New Rudder Bearing Sleeve (2023)
New Steering Cables (2023)
New Harken Furler (2017)
New (2) Carbon Fiber Spinnaker Poles (2022)
New #2 Schattauer Genoa (2022)
New North Sail Asymmetrical North Sail Spinnaker with ATN Sock (2021)
New Engine Flexible Coupling (2024)
New MaxProp (2024)
New PSS Shaft Seal (2024)
New (2) B&G Chart Plotters (2021)
New Wireless Masthead Wind Sensor (2021)
New B&G Radar (2021)
New Auto Pilot Hydraulic Drive (2021)
New Firefly House Batteries (2018)
New Lifeline Start Battery (2023)
New Blue Seas Battery Charger (2018)
New Victron Inverter (2022)
New Sun Power Solar System (2020)
New Force 10 Stove and Oven (2020)
New Refrigeration Cold Plate System (2017)
And More (See ‘Other Details’ for Full Equipment List)

‘Sir Isaac’ was featured in the July/August 2021 Wooden Boat Magazine (article available by request)

‘Sir Isaac’ is a gorgeous high-performance vessel that can be sailed with two people or with a full crew. The boat should be seen in person to fully appreciate the quality of the build, expertise of the systems and the comfort and class the vessel embodies.

Showings by appointment, thank you!

Denison Yachting is pleased to assist you in the purchase of this vessel. This boat is centrally listed by Port Townsend Boat Company.

Denison Yacht Sales offers the details of this yacht in good faith but can’t guarantee the accuracy of this information nor warrant the condition of this boat for sale. This yacht for sale is offered subject to prior sale, price change, or withdrawal from that yacht market without notice. She is offered as a convenience by this yacht broker to its clients and is not intended to convey direct representation of a specific yacht for sale.

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Sir Isaac HIGHLIGHTS

Yacht Details: 49' Custom 1984
Location: Port Townsend, WA
Engines: Yanmar
Last Updated: Dec 4, 2024
Asking Price: $500,000
Maximum Speed: 8 kn

Sir Isaac additional information

Specifications

Cruising Speed: 6.5 kn
Maximum Speed: 8 kn
Beam: 13' 0''
Hull Material: Composite
Displacement: 27,600 lb
Cabins: 3
Heads: 1

Construction:

Hull: Cold Molded, Round Bilge Construction using Port Orford Cedar and West Systems Epoxy
Hull Thickness: 2" consisting of 8 Layers. 4 1/8" Diagonal Layers, 1" Balsa Core and 4 1/8" Layers Final Outside Course Fore and Aft. Hull then covered by 1 Layer of 6oz Cloth and Clear Coated
Topsides: Painted White with 2 Part Polyurethane (Last Painted 2023)
Bulwarks and Cap Rail: Varnished Teak
Inside Hull: Clear Coated with West Systems Epoxy
Framing: 3"x3" Ring Frames every 4', Laminated Alaskan Yellow Cedar
Bulkheads: 1" Plywood
Floors: Laminated Yellow Cedar
Watertight Bulkheads: (1) Fore and (1) Aft
Keel: Welded Silicone Bronze with Lead filled bottom section. Forward end of Keel is Bolted through Stainless Steel Fore Mast Step. Aft end of Keel Bolts through Stainless Steel Main Mast Step, for an extremely strong backbone.
Ballast: Lead isolated with Welded Bronze Top, 1/2" thick Bronze Flange is G-Flexed and Bolted to Hull
Keel Bolts: All New during Restoration, Monel
Stern Tube: Fiberglass and New during Restoration
Hull Penetrations: (7) All New Groco Flange Mounted Seacocks, (4) Other Hull Penetrations above waterline with Valves for Various Bilge Pumps
Rudder: Carbon Fiber (New 2019) Designed by Paul Bieker.
Rudder Stock: 4" Diameter Carbon Fiber
Rudder Bearings: Upper and Lower Jefa Spherical Self-Aligning (2019), Lower Bearing Sleeve Custom Machined Nitronic Stainless Steel or Aquamet 22 (2023)
Steering System: Edson Pedestal with Quadrant and Cable Steering. Sheaves and Bearings Renewed/Inspected in 2023. Cables (New 2023)
Helm: Varnished Edson Destroyer 7-Spoke with Spare Varnished Edson Helm. Emergency Tiller
Deck Beams: Cedar 2'x3" on 28" Centers
Carlins and Clamp: Sitka Spruce
Deck: 2 Layers of Okume Plywood, Vacuum Bagged, 7/8". Deck is Sheathed with 10oz Structural Cloth, Painted with 2 Part Polyurethane and Non-Skidded
Head Sail Track(s): Port and Starboard installed with Machine Screws thru bolted using G-10 Sleeves thru Plywood and Cleats on Underside of Deck, Secured with Barrel Nuts
Cabin Sides: 3/4" Okume Plywood Glassed Outside, Inside Sheathed with Varnished Sapele, Vacuum Bagged to Plywood
Cabin Top: 4 Layers of 6m Okume Vacuum Bagged, Underside if Full Length Yellow Cedar, Clear Finished. Top of Cabin is Covered in 10oz Cloth, Painted with 2 Part Polyurethane and Non-Skidded
Port Lights: Cast Bronze
Hand Rails: Brass/Bronze
Cabin Fasteners: Threaded Inserts, Bronze for Structural Hardware and G-10 for Less Loaded Hardward - No Wood Screws, only Removable Machine Screws
Cockpit: New Plywood, First Sheathed in Glass then Teak Vacuum Bagged with No Fasteners to Prevent Water Instrusion.
Coaming Caps: Solid Varnished Teak
Winch Structural Support: Bronze Threaded Inserts and Thru Bolted using G-10 Backing Plates. Mainsheet Winch is Bolted to Large Brass Threaded Plate (When Unscrewed provides access to Emergency Tiller Steering Connection)

Electrical System:

Ship's System: 12 VDC and 110 VAC
Wiring: All replaced during 2016 restoration
Electrical Panel: Blue Seas with M2 OLED Digital Monitor
Battery Charger: Blue Seas P-12, 60A (2018)
Inverter: Victron 12/1200 (2022)
Small Inverter: 115V at Nav Station
House Batteries: (4) Carbon Foam Firefly AGM, 116 Ah each - Total 464 Ah (2018)
Start Battery: Lifeline Group 31 AGM (2023)
NMEA 2000 to WiFi: W2K-1 Actisense
Battery Disconnect System: ML-ACR Magnetic latching automatic relay, used for connecting/disconnecting start battery from house bank
Solar System:
- (2) Sun Power, 50W and 170W, installed on top of hard dodger and each wired via fuses to Victron MPPT 100/15 Controller (2022)
- (1) Transom Mounted 165W Panel (2024) wired via fuses to Renogy MPPT Controller

Navigation Equipment And Systems:

Chart Plotter(s): (1) B&G Zeus 3S 9" at Helm, (1) B&G Zeus 3S 12" at Navigation Station (Both New 2021)
Multi-Function Displays: (2) Garmin GMI-20
Radar: B&G Halo 20+ on Main Mast (2021)
Auto Pilot(s): Two Independent Systems
- Simrad NAC-3, Core Pack with Simrad AP44 Control Head. WR10 Remote Control. Lecomble and Schmitt Hydraulic Drive 50ST20 (2021). Tied into NMEA 2000 Backbone and can be operated through chart plotters both as compass course or wind steered. Can also be operated independently of chart plotter using remote.
- Alpa 4404. Mechanical Electrical, 100% independent of other systems. Spare, redundant, 4404 unit in box
Compass: 6" Ritchie at Steering Pedestal, automatically calibrated to function in Northern and Southern Hemispheres
AIS: Vesper Watchmate, tied into NMEA 2000, reads independently and displays on both chart plotters
VHF: ICOM 506 with DSC, tied into NMEA 2000
Speed, Depth and Ocean Temperature: Airmar Triducer with redundant Airmar Triducer for back-up
Iridium Go!: For Texting and Weather reports
Windex: One on top of each mast
Wind Sensor: B&G WS320 Wireless on top of Main Mast (2021)
Spotlights: (2) One plugged into cockpit socket, one battery powered, rechargable
Navigation Lighting: All LED
- Tricolor Masthead
- Running Lights: Lopo Lights
- Anchor Light
- Deck Light(s): on Main and Fore Masts

Galley And Cabin Equipment:

Stove and Oven: Force 10 with 3-Burners, Broiler and Oven, Gimballed with Gimballing side shelf as well, LPG (2020)
Propane Solenoid and Sniffer: Xintex S2-A
Propane Bottle: Viking Composite, in box on after deck
Refrigeration: Technautics Cool Blue ACC Cold Plate System, Air-Cooled (2017)
Sink: Double Stainless Steel with Hot and Cold Pressure Water and Manual Foot Pumps
Foot Pump(s): Whale Fresh Water Pump to Galley via Charcoal Filter, Whale Fresh Water Pump provides potable water to Head
Pressure Pump: Johnson Aqua Jet Uno 5-Stage, to Galley, Head and Cockpit
Hot Water: Provided from Engine or Shore Power via Isotemp 5 Gallon
Plumbing: Pex Tubing
Shower: Uses Flexible Faucet in Head
Cockpit Shower: Uses Removable Flexible Faucet
Cabin Heating: ITR Hurricane SCH-25 Hydronic Diesel-Fired System, Maximum heating of 25,000 BTU/h. Uses (4) Air/Water Fan Heaters throughout boat. Additionally a Bulkhead Mounted Radiator is located in the Salon for Heating and Drying. System installed during 2016 restoration. Heating is also available through an Engine Plate Heat Exchanger while engine is running
Head: Lavac Toilet pumps directly to Holding Tank
Holding Tank: 20 Gallon located above the waterline for gravity draining. Pump overhauled and hoses replaced (8/2024)

Mechanical:

Engine: Yanmar 4JH57 (2021) 800 hours
Alternator: 125 A Valeo
Marine Gear: KM35A2 2.64/1
Propeller Shaft: 1 1/4" Aquamet 22
Strut and Flange: Custom Bronze
Cutlass Bearing: (2024)
Flexible Coupling: R&D (2024)
Propeller: MaxProp 4 Bladed 20" (2024). Spare 3-Blade 19" MaxProp
Shaft Seal: PSS (2024)
Dual Racor 550 Series Fuel Filter
Valved Manifold Fuel Arrangement

Fuel System:

Fuel Filter(s): Racor Dual Filter 550 Series, Valved Manifold System allows fuel to be drawn from fore or aft tank
Fuel Pump: Jabsco Vane Fuel Transfer Pump, used for transferring to or from either tank
Vacuum Gauge: Local and Remote
Fuel Hoses: Hydraulic Hoses with Hydraulic Stainless Steel or Brass Fittings for longevity and leak resistance

Hydraulic System:

Hydraulic Control is used for the Backstay, Main Vang, Fore Vang and Staysail Stay
A Rotating Selector Valve selects which unit to adjust
All Hydraulic Adjusters and Control Panel were overhauled and tested or replaced since 2016
Hydraulic Oil Reservoir located below the bridge deck for easy filling
In the event of a failure the hydraulic system has a turnbuckle on the backstay to control the tension

Spars, Rigging And Winches:

Rig Hydraulic Control Panel: Backstay, Main Vang, Fore Vang and Staysail Headstay controller located on forward end of Cockpit Panel
Spars: Tapered Aluminum, Main Mast approximately 2' taller than Fore Mast
Fore Mast: Side by Side Hoist Tracks for Fisherman and Storm Trysail
Spinnaker Pole(s): (1) Aluminum 4"x18", (2) Carbon 4"x18" (New 2022), (1) Aluminum Reaching Strut. Carbon Poles have Covers.
Strong Tracks: Installed on Both Masts (2017)
Standing Rigging: All New 2016, Headstay and Backstay 1x19 wire, Shrouds Rod, Running Backstays (for offshore) 1x19 wire, Solent Stay is Dux/Amsteel (New 2024), Staysail Stay is 1x19 (original). Both Staysail Stay and Solent Stay are Removable
Furler: Harken Mark IV Unit 3 (New 2017), 2 Slot Foil
Halyards: Samson WarpSpeed or similar. There are port and starboard Halyards For - Main Sail, Fore Sail, Spinnaker, Headsail, and Topping Lift. Peels can be done on Spinnaker, Headsails and Fore Sails
Winches: (15 Total) All Self-Tailing. (2) SS Barient #23 on Each Mast with Spinlock Clutches. (7) Cockpit Winches - (2) Primary Aluminum Barient #32, (2) Secondary Aluminum #28, (2) Aft Cockpit Aluminum Barient #23, Main Sheet SS Barient #23, (4) Aft Cabin Top Aluminum Barient #23 with Spinlock Clutches for various Halyards and Sheets
Turning Blocks: Harken Triple Stacked 6" (Overhauled 2024)

Sails:

Sail Inventory:
- Main: Top two Battens are Full, 2 Reefs, 8.4oz (2017) Ballard Sails
- Fore: Fully Battened, 2 Reefs, Radial Dacron 9oz (2016) Ballard Sails
- Storm Trysail: Orange Top for Safety, Hoisted, Tested, Never Used (Like New)
- Fisherman: Full Hoist 4oz Crosscut (2016) Ballard Sails
Headsails:
- #1 Genoa: 5.46oz Crosscut (2016) Furler
- #2 Genoa: 8.5oz Crosscut (2022) Schattauer Sails, Furler
- #3 Jib: 9oz Tri-Radial (2016) Ballard Sails, Furler
- #4 Jib: Crosscut Dacron, Hanks for use on Solent Stay
- Storm Jib: Orange Top for Safety, Hanks for Solent Stay (Like New)
- Staysail: Hanks (Good Condition)
- Genoa Staysail: Hanks, Some Stains
Spinnakers:
- Asymmetrical: 0.75oz 1520 sq. ft., with ATN Sock (2016) Ballard Sails
- Asymmetrical: 0.75oz 1183 sq. ft., with ATN Sock (2021) North Sails
- Asymmetrical: 1.5oz Heavy Weather with ATN Sock, Pineapple Sails
- Symmetrical Spinnakers: (3) Newer North Sail Spinnnakers.
  - "Max Runner" 0.75oz
  - All Purpose 0.75oz
  - Heavy Weather Spinnaker 1.5oz
Other Sails:
- Riding Sail for at Anchor
- Fully Battened Main, Pro-Radial Dacron 9oz (2016) *inquire for more details
- Several Older Spinnakers in varying condition
- Old #1 Genoa, #2 Blast Reacher, #3 Jib and Various Headsails, Fisherman and Foresail

Tankage:

Potable Water:
- Keel Tank 100 Gallons
- Port and Starboard Stainless Steel Tanks 30 Gallons each (2016)
Fuel:
- 60 Gallon Aluminum Tank centerline (2016) Under Companionway
- 40 Gallon Stainless Steel Tank under table in Main Cabin
Waste:
- 20 Gallon Holding Tank in Head, above waterline for gravity drain. Epoxy Glassed Plywood Construction (2016)
All Tanks have Access Plates for Inspection and Cleaning, except keel tank

On Deck:

Hard Top Dodger: Carbon Fiber with Solar Panels on top. Designed to be easily removed (2020)
Main Boom Awning with (4) Laminated Spruce Bows
Hatches: (4) Lewmar Ocean Hatches (2016)
Stainless Steel Stanchions and Double 1x19 Lifelines (Lifelines new 2016) and Gates

Ground Tackle:

Electric Windlass: Maxwell Vertical VCW 2200 Series (2016) Overhauled and Seal Replaced (2024). Maxwell Wireless Remote Control and Hard Wired Remote. No foot controls
Anchors:
- 1-Rocna 25, 55lb
- 1-FX-55 Fortress
- 1-Bruce 20kg
Rode:
- 300' of 3/8" ACCO G43 HT Galvanized Anchor Chain (2024)
- 1-75' Length of 3/8" G43 HT Galvanized Chain (New-Unused)
- 2-150' Lengths of 5/8" Nylon Rope Rode
- 1-200' of 3/4" Nylon Rope Rode

Washdown:

Washdown Pump: Johnson High Pressure, used for deck washdown and anchor etc.

Safety:

Life Raft: Datrex 4-Person (2021)
Transom Mounted Gudgeons for Cassette with Emergency Rudder
Horse Shoe Life Ring
Life Sling
MOM8A Rescue Horseshoe
Gale Rider Style Drogue
Horn, Compressed Air
Bell
Jack Lines
(3) 10lb ABC Dry Chemical Fire Extinguishers (Inspected 2024)
(1) Halyon 1211 Fire Extinguisher
Flares: Orion Signal Kit: 12 Gauge Launcher with Aerial Flares (Expires 1/2027), (2) Handheld Parachute Flares (Expire 12/2024), (3) Handheld Red Signal Flares (Expire 11/2026) and (2) Hand Deployed Smoke Signals (Expire 11/2024)
Radar Reflector Mounted in Rigging