Harken 7410.10 MKIV Jib Reefing & Furling User Manual
Page 5

MKIV Unit 0
5
1. Harken toggle assembly required. Sold separately.
2. Mating turnbuckle components must be purchased separately.
3. Headstay may require cutting and shortening to fit Harken toggle.
Headstay may remain uncut by replacing lower stud of turnbuckle
with stud/eye thus eliminating extra toggle.
4. Rod rigging requires Harken rod adapter stud.
5. Order Harken 7404 Lead Block Kit. Fits 1" (25 mm) stanchions.
Preassembly
Rigging Parts Check/Tools
Tools Required
MKIV Furlers are shipped with 3M 5200
adhesive. Use adhesives on dry connectors
and foils using the special injection system
described in the assembly section. Parts
may immediately be exposed to rain. Cure
is best at 70F (22C) with 50% humidity. Do
not apply at temperatures below 40F
(5C) and above 100 F (38C).
Although adhesive has not cured it will
remain in place on foil joints whether
they are left on the ground or raised up
on boat. Foils can be raised immediately
after assembly and sails fitted.
Note: A small amount of adhesive may
bulge out of injection ports. If possible
let system sit for a couple days before
sailing. If adhesive gets on sails remove
using acetone. For faster-curing adhesive,
purchase 4200 Fast Cure.
Note: Damaged foils can be repaired.
Use a hand-held propane torch to heat
joints until foils can be pulled apart.
Adhesive Alert
1. Long tape measure
6. Side cutters
11. Center punch
2. Short tape measure
7. Rat-tail file
12. Rigging or black tape
3. Power drill
8. Hex keys (provided)
13. Scissors
4. Drill bit – 1/8" (3 mm)
9. Slotted/Phillips screwdrivers
14. Metal straight edge
5. Hacksaw
10. Needle-nose pliers
15. Hammer
10
13
12
11
8
7
6
5
3
2
1
15
4
14
9
WARNING! A stay that is old or
damaged may break suddenly,
causing an accident. Headstay
condition should be checked by a
professional rigger before reusing.
ROD RIggIng
Harken Rod Adapter
Stud Required
(Sold Separately)
Includes 3 x 7403; 1 x 7401;
1 x 7402; 1 Horn Cleat
7404 Lead Block Kit
(Sold Separately)
7410.20 5/16
7410.20 3/8
7410.20 7/16
Eye/Jaw Toggle
All unITS
Harken Toggle
(Sold Separately)
7420 -4
7421 -6
Rod Adapter Stud