Serving sailors online since 1997
 
 

MKIV Underdeck Furling

Unit 0 - Unit 1 - Unit 2 - Unit 3

Harkens MKIV Underdeck Furling is the perfect solution for performance racers and cruisers who want an aerodynamic system with a minimal amount of equipment above deck. The drum is located beneath the deck, lowering the tack height for maximized sail area. The small outside drum diameter lets unit fit inside narrow bows.
 
Ball bearings between the center hub and deck bearing provide low-friction furling. The through-deck bearing minimizes water seepage into the underdeck compartment. The torque tube houses a full-length turnbuckle for optimal mast rake and tension adjustment.
 
The Unit 0 is a one-piece integrated deck bearing and line guard provides durability and corrosion resistance. It features an articulating ball joint, eliminating the universal joint and toggle to reduce weight and to simplify maintenance.
 
The Unit 0 furler and headstay are independent of each other, allowing flexible installation options.
 
The torque tube houses a full-length turnbuckle for optimal mast rake and tension adjustment.
 
Units 1, 2, and 3's Aluminum line guard, torque tube, and swivels are deep-saturation hardcoat-anodized for no-fade UV stabilization and durability. The hardcoat-anodized line guard is urethane-coated for additional corrosion protection.
 
The torque tube houses a full-length turnbuckle for optimal mast rake and tension adjustment. A torque tube universal joint on Units 1, 2, and 3 provides a high-strength universal connection to allow ample headstay sag when sailing downwind.
 
Units 1 and larger have self-locking threaded height adjusters for a correct fit between the chainplate and deck.
 
No height adjuster needed
 
Furler and headstay are independent of each other, allowing flexible installation options
 
Small outside drum diameter fits inside narrow bows
Leaves warehouse: Next business day
(if in stock)

Shipping time: see chart

Made to order: No

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Current inventory as of Thursday, 4:30 pm Pacific time
Item Our SKU
Mfg P/N
Specs Status Price Quantity
Unit 0 Underdeck Furler, Toggle Not Required (22 ft - 30 ft Boat Length)
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SKU 373659

Mfg p/n 7410.11
Headstay Length: 38'4", Max 45'4"
Toggle: Toggle Not Required
Type: Unit 0
Typical Boat Length: 22 ft - 30 ft
Wire Dia.: 3/16", 7/32"
Out of Stock$3,210.99
Unit 1 Underdeck Furler w1/2 in. Toggle (28 ft - 36 ft Boat Length)
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SKU 440700

Mfg p/n 7411.11 1/2
Headstay Length: 45'11", Max 52'11"
Toggle: 1/2" Toggle
Type: Unit 1
Typical Boat Length: 28 ft - 36 ft
Wire Dia.: 1/4", 9/32", 5/16"
Out of Stock$3,909.99
Unit 2 Underdeck Furler w5/8 in. Toggle (35 ft - 46 ft Boat Length)
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SKU 440702

Mfg p/n 7412.11 5/8
Headstay Length: 60'4", Max 67'4"
Toggle: 5/8" Toggle
Type: Unit 2
Typical Boat Length: 35 ft - 46 ft
Wire Dia.: 5/16", 3/8"
Out of Stock$5,614.99
Unit 3 Underdeck Furler w3/4 in. Toggle (45 ft - 60 ft Boat Length)
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SKU 440706

Mfg p/n 7413.11 3/4
Headstay Length: 75'1", Max 82'1"
Toggle: 3/4" Toggle
Type: Unit 3
Typical Boat Length: 45 ft - 60 ft
Wire Dia.: 7/16", 1/2"
Out of Stock$8,315.99
Unit 3 Underdeck Furler w7/8 in. Toggle (45 ft - 60 ft Boat Length)
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SKU 440708

Mfg p/n 7413.11 7/8
Headstay Length: 75'1", Max 82'1"
Toggle: 7/8" Toggle
Type: Unit 3
Typical Boat Length: 45 ft - 60 ft
Wire Dia.: 7/16", 1/2"
Out of Stock$8,917.99

 
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