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Harken C8436 MKIV Jib Reefing & Furling User Manual

Page 18

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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.

8 - 10°

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.

Commissioning

Halyard Wrap

18

Nautor MKIV Furling

4/18/07

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