Harken C7475 MKIII Jib Reefing & Furling - Manual (Page 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.
■ PREVENT WRAPS
WARNING: The sail must be fitted to the foils before operation.
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.
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.
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
1 /
3
the length of the swivel. There should be less foil
exposed above the swivel than 1 /
3
of the swivel.
8 - 10°
ADJUSTMENTS Halyard Wraps
10 Nautor Furling December 2004