MKIV Jib Reefing and Furling

Designed for performance racing and cruising sailors, MKIV furling systems are strong, lightweight and aerodynamic, with the performance and features Harken® is known for. Longevity, ease of use and simplicity of installation are crucial components of the design. These free-rolling furlers make all the difference in headsail control by allowing racers and cruisers to quickly furl and reef from the safety of the cockpit, while maintaining great sail shape and optimal speed.

Aluminum line guard, torque tube and swivels are deep-saturation Hardkote anodized for strength and durability, with a black additive for no-fade UV-stabilization and corrosion protection. The line guard is also powder coated for added corrosion resistance. The drum cap is engineered from tough polymer resin.

Systems feature free-rolling ball bearings, computer-designed stacked bearing races and large-diameter drums for smooth reefing and furling. A free-spinning, high-strength halyard swivel reduces weight aloft to minimize pitching and heeling. The double foil grooves allow fast hoists, douses, and sail changes—ideal for club racing.

MKIV jib reefing and furling systems are designed for owner installation. Seven-year limited warranty.

Fits boats:
Unit 3: 45 - 60 ft (13.7 - 18.3 m)

Features:

1. Free-Rolling Ball Bearings
Multiple rows of large-diameter Torlon® ball bearings in high load areas of the halyard swivel and drum minimize friction for smooth furling; Require no lubrication or isolating seals.

2. Strong Foil Joints
Tough triple-interlock foil joints withstand years of torque loading. Connector’s geometric shape interlocks to foil and secures with a syringe-injected adhesive into an engineered channel. Screws provide final lock.

3. Easy to Assemble Foils
C-shaped open connectors with low-friction plastic isolators slip onto the headstay wire and into foil for easy installation.

4. Drum Installs Over Existing Turnbuckle
Units are adaptable to a variety of rigging options for easy installation. Harken toggle assembly accepts standard turnbuckle using swage, rod, Norseman® or Sta-Lok® terminals. Toggle flips for fork or tang chainplate installation. A single stainless steel clevis pin provides access to the turnbuckle for adjustment.

5. Stainless Steel Feeder
Stainless steel feeder allows fast singlehanded hoist and quick sail changes.

6. Removable Split Drum
Line guard and spool come off easily for racing.

7. Double Foil Grooves for Racing
Aerodynamic aluminum Air Foils® handle extreme reefing loads. Double foil grooves allow fast hoists, douses and sail changes.

8. Improved Sail Shape
Independent swivels furl sail center before head and tack for improved sail shape and smoother furling.