Harken MKIV Unit 1 Jib Reefing and Furling System - 7411.10

The Harken MKIV Unit 1 Jib Reefing and Furling System is a strong, lightweight and aerodynamic furling systems designed for racing and performance-minded cruising sailors. Its free-rolling furlers ensure headsail control by allowing racers and cruisers to quickly furl and reef from the safety of the cockpit while maintaining optimal sail shape and speed.

Features:

• Easy to assemble and adaptable to a variety of rigging options
• C-shaped open connectors with low-friction plastic isolators slip easily onto headstay wire and into foil
• Harken toggle assembly accepts standard turnbuckle using swage, rod, Norseman® or Sta-Lok® terminals
• Toggle flips for fork or tang chainplates installation
• Single stainless steel clevis pin provides access to turnbuckle for adjustment
• Head and tack swivels featuring Torlon® ball bearings operate independently to improve the shape of a partially furled sail for added power through the water
• Strong but lightweight halyard swivel reduces windage and weight aloft to minimize pitching and heeling
• Stacked bearing races evenly distribute loads to ball bearings foils turn freely under halyard loads
• Tough triple-lock foil joints withstand years of torque loading
• Large inner spool diameter increases mechanical advantage for powerful reefing and furling
• Unit rotates around headstay furling bearings do not carry headstay load
• Line guard and spool easily removed for racing
• Double foil grooves allow fast hoists, douses and sail changes
• Aluminum line guard, torque tube and swivels are deep-saturation hard coat-anodized for UV stabilization, strength and durability
  • Urethane-coated anodized line guard
  • Specially formulated low-stretch black line (standard on MKIV units 0, 1 and 2)
  • Abrasion and UV-resistant black extrusions

• Typical boat length: 28' - 36'
• Headstay length: 45' 11" standard / 52' 11" max
• Headstay diameter:
  • Wire: 1/4", 9/32", 5/16"
  • Rod: -8, -10, -12
• Clevis pin diameter: 1/2", 5/8"
• Do not use Harken Equipment for human suspension

Notes:

• Do not use Harken Equipment for human suspension
• Toggle assembly required but not included must be ordered separately

Jib Reefing & Furling Product Information

Harken MKIV Unit 1 Jib Reefing and Furling System Installation Manual (4.88 MB)