Harken 254 User Manual

LAZY JACK KIT

254

Installation Manual – Intended for specialized personnel or expert users

4058 12/13

Boats

35 – 42 ft. (10.7 - 12.8 m)

Booms

12 - 16 ft. (3.7 - 4.9 m)

Please read these instructions carefully before installing, servicing, or
operating the equipment.This manual may be modified without notice.

See: www.harken.com/manuals for updated versions.

PLEASE SAVE THESE INSTRUCTIONS

Parts List

2 6' (1.82 m) wire assemblies including blocks and mast tangs
2 30'6" (9.29 m) upper line assemblies with blocks
1 104' (31.69 m) adjusting line
5 H073 Stainless steel eyestraps
1 H132 Big Bullet cheek block
1 4" (101 mm) aluminum cleat
21 3/16" (4.76 mm) stainless steel rivets (includes 3 extra)
21 10-32 x .375 slotted trusshead machine screws
3 #10 x 11/4" (32 mm) flathead self-tapping screws (includes 1 extra)
3 10-32 x 3/4" (19 mm) trusshead machine screws (includes 1 extra)
3 #10 x 3/4" (19 mm) trusshead self-tapping screws (includes 1 extra)

Tools Required

Marker or pencil

5

/32" (4 mm) drill bit
Center punch Tape measure (long enough to measure luff length)
Hammer Electric drill
Drill, Tap & Screw Method:

1 – 1 slotted screwdriver
1 – 5/32" (4 mm) drill bit
1 – 10-32 tap set

Rivet Gun Method

Stainless steel rivets require a heavy-duty rivet gun. It may be necessary to rent a
rivet gun if you do not have a heavy-duty model.
Drill Bit – 13/64" (5 mm)

Topping Lift

To avoid snagging the mainsail on the Lazy Jacks when raising sail, the boat
must be equipped with a topping lift or vang that holds boom lifted.

Altering Sail Cover

Take your sail cover to a sailmaker to have slits cut in the cover for the Lazy Jacks.
Slits should have Velcro or snap closures to make it easy to cover the mainsail.
Mark your cover after installation so the slots can be positioned correctly.

Determining the Location of Mast Tang

Measure the mainsail luff length or find the “P” dimension of the mast. Find this
measurement in the left column below and circle the number in the right column.
See drawing, page 3.

Chart A

If the mainsail luff length or
P dimension measures:

10.85 - 10.97 m

12.67 - 12.80 m

The tang location
measured from the
top of the boom is:

7.14 m

7.24 m

7.34 m

7.42 m

7.52 m

7.62 m

7.72 m

7.82 m

7.92 m

8.03 m

8.13 m

8.23 m

27'4"

8.33 m

If the mainsail luff length or
P dimension measures:

42'1' to 42'6" 35'7" to 36'
42'7" to 43' 36'1" to 36'6"
43'1" to 43'6" 36'7" to 37'
43'7" to 44' 37'1" to 37'6"
44'1" to 44'6" 37'7" to 38'
44'7" to 45' 38'1" to 38'6"
45'1" to 45'6" 38'7" to 39'
45'7" to 46' 39'1" to 39'6"
46'1" to 46'6" 39'7" to 40'
46'7" to 47' 40'1" to 40'6"
47'1" to 47'6" 40'7" to 41'
47'7" to 48' 41'1" to 41'6"

— 41'7" to 42'

12.83 - 12.95 m

12.98 - 13.11 m11.00 - 11.13 m

13.13 - 13.26 m11.15 - 11.28 m

13.28 - 13.41 m11.30 - 11.43 m

13.44 - 13.56 m11.46 - 11.58 m

13.59 - 13.72 m11.61 - 11.73 m

13.74 - 13.87 m11.76 - 11.89 m

13.89 - 14.02 m11.91 - 12.04 m

14.05 - 14.17 m12.07 - 12.19 m

14.20 - 14.33 m12.22 - 12.34 m

14.35 - 14.48 m12.37 - 12.50 m

14.50 - 14.63 m12.52 - 12.65 m

2

—

The tang location
measured from the
top of the boom is:

27' 7"23'5"
27'11"23'9"
28' 3"24'1"
28' 7"24'4"
28'11"24'8"
29' 3"25'0"
29' 7"25'4"
29'11"25'8"
30' 3"26'0"
30' 7"26'4"
30'10"26'8"
31' 2"27'0"

8.41 m

8.51 m

8.61 m

8.71 m

8.81 m

8.92 m

9.02 m

9.12 m

9.22 m

9.32 m

9.40 m

9.50 m

—

—

Installing Mast Tang and Wire Assembly

If you are installing system with the mast up, take the following parts up in the
bosun's chair or send them up with a messenger line. (Follow all precautions to insure
the safety of the person aloft. Use a safety halyard and make sure halyards are in good
condition. Make sure no one is standing where they could be hit with dropped tools.)

WARNING! When drilling through mast, do not let drill bit contact the halyard that is
holding you aloft! This may cause the halyard to fail. Limit depth.

Tape measure Screw Method
Port and starboard templates (attached to pg. 3) Drill with 5/32" (4 mm) drill bit
Tape for template #10-32 Tap & Handle
Tang assembly including wires and blocks Slotted Screw Driver
Hammer Rivet Method
Center punch Drill with 13/64" (5 mm) drill bit
Rivet Gun
Note: before going up the mast, insert the middle screw or rivet into the tang.
Squeeze the top and bottom of the tang together to insert the screw or rivet. It
may be necessary to use a pliers or vice grips.
Measure up from the top of the boom to the height from chart A (page 2).
Moveable Gooseneck - If the gooseneck is capable of moving up and down, measure
from the top of the boom when the boom is positioned in its normal sailing position.
Mark the mast at this point.
Tape the template to the side of the mast so the middle hole is even with your mark.
Line the template up so the vertical line is parallel to the side of the mast. See drawing
below.
Use center punch to mark (4) four tang holes. Remove template and drill (4) four holes.
DRILL HOLES: Screws 5/32" (4 mm) & Tap #10-32 Rivets 13/64" (5 mm)
Attach tang beginning with center holes.

Installing Mast Tangs

Mast Tang
Assembly

Top View

Tangs installed

on widest part

of mast

Measurement

from

Chart A

3