Skip to content



SKU 7411.11 1/2
Original price $13,587.48 - Original price $13,587.48
Original price
$13,587.48 - $13,587.48
Current price $13,587.48

Harken’s MKIV Underdeck Jib Reefing & Furling line is the perfect solution for sailors who want an aerodynamic system with a minimal amount of equipment above deck. The underdeck furler provides a low-friction, clean layout solution that minimizes windage, while uncluttering the bow for easy anchor access.

Tack sits at deck level, lowering the tack height for maximized sail area.

Through-deck bearing into underdeck compartment provides a low profile, nearly watertight system.

Luff tape size (mm)
5 mm

Wire Ø (1 x 19 SS) (mm)
6, 7, 8 mm

Rod Ø (mm)
5.72, 6.35 mm

Rod Ø (dash)
-10, -8

Clevis pin Ø (mm)
12.7 mm

Standard headstay length (m)
13.99 m

Maximum headstay length (m)
16.12 m

A (mm)
96 mm

B (mm)
150 mm

C maximum (mm)
250 m

D (mm)
47 mm

E maximum (mm)
1041 mm

E minimum (mm)
1003 mm

F maximum (mm)
213 mm

F minimum (mm)
209 mm

G maximum (mm)
186 mm

G minimum (mm)
183 mm

H (mm)
140 mm

I (mm)
66 mm

J maximum (mm)
59 mm

J minimum (mm)
56 mm

K (mm)
25 mm

L (mm)
29 mm

Extrusion length (m)
2.13 m