184 I J Ordering Jib Reefing & Furling 1. Choose Furler Type The table below is based on sailing style and approximate boat size. This table is only a guideline. Do not use it to determine unit size. Size is based on the headstay and clevis pin diameters listed on unit pages. Comparison Chart 2. Determine Unit Size Size is based on the headstay and clevis pin diameters listed on unit pages. Choose between unit sizes when diameters are shared by considering stay length and typical boat size recommendations. Contact Harken if you have any questions. 3. Determine if Additional Foils Needed Use the I and J measurements to determine the length of the headstay. If the existing headstay is longer than the standard length listed under Headstay Length on unit pages, order additional foils and connectors. In some cases one or two extra foils and connectors may be necessary. 4. Determine Toggle and Link Plate Use short toggle for maximum luff length. 5. Choose Lead Block Kit and Accessories Harken recommends equipping every furling system with a ratchet lead block kit. Other parts on the Furling Accessories page (185,191) include equipment for halyard management and racing hardware for faster sail changes. Order line for MKIV Ocean furlers. 6. Prepare Sail and Headstay Have a luff tape added to your genoa. Match the sail length to the stay length minus the height of the halyard swivel and lower unit. See sizing information on page 184. MKIV and MKIV Ocean furlers install over the existing turnbuckle. The turnbuckle is accessible for adjustment by raising the drum. See the MKIV & MKVI Ocean Toggle & Rigging Options on page 173 to determine toggle and rigging requirements. Some headstays will require cutting and shortening to fit Harken toggle. Sometimes only the lower threaded turnbuckle fitting needs changing. Check with a professional rigger on stay condition before reusing stay. For all units, rod rigging requires a Harken rod adapter stud. It must be cut and coldheaded by an authorized rod service center. 7. Contact If you have questions, please contact your dealer or Harken Technical Service. Measure clevis pin diameter Measure wire or rod diameter Forestay Bow Headstay length = I 2 + J 2 MKIV long link plate MKIV Jaw/jaw toggle MKIV Ocean Cruisers MKIV Racers/performance cruisers Note: Typical boat lengths are listed as a guideline but are not the determining factor. Check with Harken if your length varies. Typical boat lengths Unit 0: 6.5 – 9.1 m (22 – 30') Unit 1: 8.5 – 11 m (28 – 36') Unit 2: 10 – 14.2 m (35 – 46') Unit 3: 13.7 – 18.3 m (45 – 60') Unit 4: 19.8 – 24.4 m (65 – 80') Unit 0: 6.5 – 9.1 m (22 – 30') Unit 1: 8.3 – 11 m (28 – 36') Unit 2: 10.6 – 14.2 m (35 – 46') Unit 3: 13.7 – 24.4 m (45 – 80') Foils Halyard and tack swivel Drum Line Independent swivels for improved sail shape Double-groove Air foil Stainless steel feeder Removable split drum for racing Included on Units 0, 1, 2 Single-groove round foil Stainless steel feeder Fixed Included on Units 0, 1, 2 Fixed
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