Harken MKIV Ocean Unit 3 Jib Reefing and Furling System - 7513.1

The MKIV Ocean Unit 3 Jib Furling System is engineered for cruising sailors who require strength, durability, and easy sail handling. This free-rolling furling system allows headsail furling and reefing from the safety of the cockpit while maintaining excellent sail shape. Built with hardcoat-anodized aluminum and UV-stabilized materials, it delivers long-term reliability in demanding marine environments.

Multiple rows of Torlon ball bearings minimize friction for smooth operation and reduced furling effort. The bearings require no lubrication for simplified maintenance, while the single groove foil design provides dependable sail control and performance.

Features:

• Engineered for strength, longevity, and ease of use
• Allows headsail furling and reefing from the safety of the cockpit
• Maintains excellent sail shape while furling and reefing
• Hardcoat-anodized aluminum construction
• UV-stabilized for long-term durability
• Multiple rows of Torlon ball bearings minimize friction
• Bearings require no lubrication for easy maintenance
• Single groove foil design

Specifications:

• Wire Diameter (1 x 19 stainless steel): 9/16" (16 mm)
• Rod Diameter: 9/16" (14.3 mm)
• Rod Dash Size: -48
• Clevis Pin Diameter: 7/8" (28.6 mm)
• Standard Headstay Length: 74' 8" (22.76 m)
• Maximum Headstay Length: 88' 8" (27.03 m)
• Extrusion Length: 7' (2.13 m)
• Luff Tape Size: #6 (6/32") (5 mm)
• Dimensions:
  • A: 7 5/16" (186 mm)
  • B: 11 5/8" (296 mm)
  • C: 3 3/8" (86 mm)
  • D: 9 3/4" (247 mm)
  • E: 4 3/4" (121 mm)
  • F (Maximum): 50 5/8" (1286 mm)
  • G (Maximum): 18 7/16" (467 mm)
  • H (Maximum): 16 5/8" (420 mm)
  • I (Maximum): 7 3/8" (188 mm)

Owner's Manual (3.67 MB)