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Commissioning
8 - 10°
08/27/2009
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 furling system and the halyard. In severe
cases, halyard wraps may cause loss of the headstay.
Halyard wraps are prevented by the halyard swivel which allows the foils to turn
while the halyard remains stationary. To prevent wraps, the halyard must exert a
slight pull to the rear.
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.
If a halyard wraps, do not force the unit to turn. Attempt to open the sail by
alternately pulling the sheets and the furling line. If the sail can be unfurled, lower
the sail by releasing the jib halyard. Severe halyard wraps can only be cleared by a
professional 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.
WARNING! Do not go aloft on boat's halyards if there has been a
halyard wrap. Do not use boat. Damage to halyard, headstay, stay
terminals or connections as a result of a halyard wrap may cause
these parts to break suddenly causing mast to fall down while person
is aloft resulting in severe injury or death. Sailing or motoring with
boat after a wrap can result in the headstay breaking and mast falling
down possibly resulting in severe injury or death. Before using boat,
have a professional rigger inspect and replace parts as necessary
using following methods.
A professional rigger must carefully inspect the masthead area using a secure
hoisting method. Inform rigger that there has been a halyard wrap so they can
avoid an accident by relying on standing rigging or halyards. Inspection must be
done while rigger is suspended from a separate crane or mast must be lowered
to perform inspection. Some professionals may rig a new line through internal
masthead sheaves to serve as a temporary headstay to hold mast in place. Wire,
rod rigging, terminals, toggles, clevis pins or cotter pins must be inspected and
replaced if they show any signs of damage.
■ To prevent halyard wraps, the halyard swivel should be within the top 3" (76 mm)
of the foil unless a halyard restrainer is used.
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. 3" (76 mm) is one half the length of the swivel. There
should be less foil exposed above the swivel than half the length of the swivel.
WARNING! Sail must be fitted to foil length before using to prevent
halyard wraps and possible headstay loss which will cause an
accident, damage to your vessel, personal injury or death.
See www.harken.com for additional safety information.
■ Halyard must pull slightly to rear (8 - 10°).
■ The halyard must be snug but not too tight.
Test furler at dock, but if water is smooth an incorrect lead angle may not
be apparent. Halyard wraps usually occur in wave action when lead angle
is not correct. The 8-10° angle shown at left is critical.
Unit 00AL
Halyard Wraps • Halyard Swivel Height • Halyard Lead Angle
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