Harken 7413.15 MKIV Hydraulic Jib Reefing & Furling - Manual (Page 30)

30 MKIV Hydraulic Unit 3
Furl and Reef
To furl or reef, ease jib sheets and press correct
switch to furl sail.
In very light air, it may be necessary to place
some tension on jib sheet to insure a tight furl.
To furl in a breeze, ease sheets gradually and furl
sail in smaller increments until sail is furled or
reefed.
When furling or reefing, make sure that nothing
is jammed. Review swivel height, lead angle, halyard restrainer information. Make sure operator has a good view of sail
and stops furling when sail is rolled and sheets have a wrap or two on the furled sail. Stop immediately if sheets jam or
halyard wraps. If operator does not have a good view, station a crew member with good visibility and communicate to
operator. If motor is laboring stop and check for reason. Consult the Troubleshooting Guide on page 35.
Raise Sails
1. Install prefeeder by securely tying end of line to a deck fitting or to toggle below
furler so it is 2' (610 mm) below feeder.
2. Shackle tack of sail to lower unit. Install shackle so screw pin head is on same side
as sun cover.
3. Secure genoa sheets to clew of sail.
4. Attach genoa halyard to halyard swivel.
5. Pass luff tape through prefeeder and feeder into foil groove.
6. Attach head of sail or pendant at head of sail to halyard swivel.
7. Hoist sail.
8. Attach genoa tack to Lower Unit shackle.
8. Once sail is raised, determine the direction of furling so suncover will shield sail
from UV rays when furled.
9. Suncover on port side of sail, furl clock-wise. Suncover on starboard, furl
counter-clockwise.
Tip: Once you have determined the direction of furl to match the suncover, mark
remote furler switches, i.e. “furl/unfurl” or “in /out”.
Tip: New sails are often stiff and may hang up on prefeeder during raising. Do
not force sail when it hangs up—lower and remove twist. Sails "break in" with
use and will become easier to raise.
Storm Sails
Most people will use one multi-purpose genoa for all their sailing, but it is not good seamanship to go offshore
without storm sails.
Heavy-air working jibs and storm sails may be used with your unit. These sails need to have luff tape added to allow
them to be raised in headstay foils.
These sails will generally require pendants to ensure that halyard swivel is properly positioned at top of headstay.
See page 28.
Remember that heavy-air working jibs and storm jibs may be reefed and furled like any other sail.
Operation Raise Sail/Storm Sail/Reefing
WARNING! A hydraulic furling system is very powerful and jammed parts can break suddenly at high
load. Stop furling immediately and correct problem.