Harken Jib Furler Identification Chart (PDF)

IDENTIFICATION CHART

Identify which Harken jib furler family you have (MKI, MKII, MKIII, 00AL, MKIV, Cruising, ESP) and its unit size, so you order the right replacement parts.

DocumentHarken Jib Furler Identification Chart

FormatPDF · 1 page · 0.3 MB

LanguageEnglish

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Family Unit Size Ordering Parts Products

Family Identification

Family	Line guard	Spool	Torque tube	Screws near torque tube base	Unit number / date
MKI	Stainless cup, one opening	Gray-anodized aluminum	Straight cylinder	Yes	Size and date stamped on top of spool
MKII	Stainless curved plate secured to gray aluminum, single line opening	Gray plastic	Tapered	Yes	No size marked (see size chart). Date on hub of halyard swivel and lower unit (remove split drum)
MKIII	Black aluminum guard, 4 openings, 2 for line	Black plastic	Tapered	Yes	No size marked (see size chart). Date on hub of halyard swivel and lower unit (remove split drum)
00AL	Black aluminum guard, 4 openings, 2 for line	Black plastic	Tapered top	No	No size marked (see size chart). Date on halyard swivel and lower unit (remove drum)
MKIV	Black aluminum guard, 4 openings, 2 for line	Black plastic	Tapered top	No	Size on label, no date
Cruising	Black aluminum guard, 4 openings, 2 for line	Black plastic	Straight cylinder	No	Size on label, no date
ESP	Stainless steel guards, 5 openings, 1 for line	Black plastic	None	Hub extension connects to foils with set screws	Measure drum Ø

Cruising and ESP foils have a single sail groove; all other families have two. Some parts for older furlers may no longer be available.

Harken jib furler family identification photos

Size Identification (MKI, MKII, MKIII, 00AL, ESP)

MKIV and Cruising furlers have the unit size printed on the label. For older units measure the drum diameter across the top of the drum, the clevis pin diameter and the torque tube length.

Unit size	Drum Ø in	Drum Ø mm	Clevis pin Ø in	Clevis pin Ø mm	Torque tube in	Torque tube mm
00AL	5 3/4	146	1/4, 5/16, 3/8, 7/16	6, 8, 9.5, 11.1	9 1/2	241
0	5 13/16	147	5/16, 3/8, 7/16	8, 9.5, 11.1	5 7/8	150
1	7 7/16	188	1/2	12.7	7 7/16	189
1.5	7 7/16	188	5/8	15.9	13	330
2	9 1/2	241	5/8	15.9	10 5/16	262
2.5	9 1/2	241	3/4	19.1	17 1/4	438
3	12	305	3/4, 7/8	19.1, 22.2	13	330
3.25	12	305	7/8, 1	22.2, 25.4	15	381
ESP 0	6 1/2	166	5/16, 3/8	8, 9.5	—	—
ESP 1	8	200	7/16, 1/2	11, 12.7	—	—
ESP 2	9 7/8	250	5/8, 3/4	15.9, 19.1	—	—
ESP 3	11 3/4	298	7/8, 1	22.2, 25.4	—	—

Units 1 and 1.5 share the same drum; units 2 and 2.5, and 3 and 3.25, too. Tell them apart by clevis pin and torque tube length.

Ordering Parts

Give us the family, the unit size and, where marked, the date of manufacture.
Harken publishes the parts list for each family and size in its manuals; MKIV and ESP spares we stock are in the linked collection.

Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.