Harken 1027 MKIII Hydraulic Jib Reefing & Furling - Manual (Page 20)

20 Hydraulic 3/3.25 7/17/08
Adjustments Halyard Wraps/Prevent Halyard Wraps
8 - 10°
■ HALYARD WRAPS
The most serious problem with furling systems occurs when the jib
halyard wraps around the headstay foil. Halyard wraps will prevent
furling or unfurling and may cause serious damage to the unit and the
halyard. In severe cases, halyard wraps may cause headstay loss.
To prevent wraps, the halyard must exert a slight pull to the rear.
This allows the foils to turn while the halyard remains stationary.
TIP: With the sail raised, walk away from the boat and look at the
masthead with binoculars. Use the halyard swivel as a measurement
reference. 4" (100 mm) is /
3
the length of the swivel. There should be
less foil exposed above the swivel than 1 /
3
of the swivel.
WARNING!: In severe cases, a halyard wrap can cause loss of
control of boat and/or headstay can break suddenly which can
cause an accident, damage to your vessel, personal injury or
death. See www.harken.com for additional safety information.
WARNING!: Sail must be fitted to foil length before using to
prevent a halyard wrap which could lead to headstay breakage
causing an accident, damage to your vessel, personal injury or
death. See www.harken.com for additional safety information.
If a halyard wraps, do not force the unit to turn. Attempt to open the
sail by alternately furling in and out slightly.
If the sail can be unfurled, lower the sail by releasing the jib halyard.
Severe halyard wraps can only be cleared by going aloft and freeing
the halyard.
If the sail will not furl or unfurl, it may be possible to remove the jib sheets
and manually wrap the sail around the headstay.
Remember: Testing at the dock does not indicate the halyard angle is
correct. In wave action, the halyard may wrap if the lead angle is not
correct. The 8-10° diverging angle mentioned above is critical.
1 Halyard swivel should be within the top 4" (100 mm)
of the foil.
2 Halyard must pull slightly to the rear (8 - 10°).
3 Halyard must be snug, but not too tight.
■ PREVENT WRAPS