Harken MKIV Ocean Jib Furling System
MKIV Ocean furling systems for cruisers are engineered for strength, longevity, and ease of use. These free-rolling furlers make all the difference in headsail control by allowing cruisers to furl and reef from the safety of the cockpit, while maintaining great sail shape.
MKIV Ocean furling systems offer the same quality as MKIV for racers but without features cruisers don’t need. They are made of hardcoat-anodised aluminium, UV-stabilised for durability and include multiple rows of Torlon® ball bearings to minimise friction and make pulling the furling line a less physical experience.
The bearings require no lubrication for easy maintenance and feature a single groove foil.
| Part Number | HKN-7510.10 | HKN-7511.10 | HKN-7512.10 |
| A | 96 mm | 120 mm | 143 mm |
| B | 150 mm | 178 mm | 231 mm |
| C | 47 mm | 51 mm | 66 mm |
| D | 140 mm | 167 mm | 208 mm |
| E | 66 mm | 78 mm | 97 mm |
| Clevis pin Ø | 11.1 mm | 15.9 mm | 19.1 mm |
| Rod Ø (dash) | -6 | -8 | -22 |
| Rod Ø (mm) | 5.03 mm | 7.14 mm | 9.53 mm |
| Wire Ø (1 x 19 SS) | 6 mm | 8 mm | 11 mm |
| Standard headstay length | 11.77 m | 13.99 m | 18.38 m |
| Maximum headstay length | 13.9 m | 16.12 m | 20.51 m |
| F maximum | 1041 mm | 1175 mm | 1314 mm |
| F minimum | 997 mm | 1073 mm | 1187 mm |
| G maximum | 213 mm | 305 mm | 384 mm |
| G minimum | 203 mm | 247 mm | 306 mm |
| H maximum | 186 mm | 280 mm | 348 mm |
| H minimum | 175 mm | 222 mm | 276 mm |
| I maximum | 59 mm | 129 mm | 164 mm |
| I minimum | 51 mm | 71 mm | 85 mm |
| Extrusion length | 2.13 m | 2.13 m | 2.13 m |
| Luff tape size | 5 mm | 5 mm | 5 mm |
