Harken 253 Lazy Jack Kit Instruction Manual page 2

Parts List
2 Wire assemblies including blocks and mast tangs
1 62' (19 m) length of
3 Stainless steel eyestraps
1 Carbo cheek block
1 4" (101 mm) aluminum cleat
15 10-32 x
15 3 / " (4.76 mm) stainless steel rivets (includes 3 extra)
16
3 #10 x 1 1 /
3 10-32 x
3 #10 x 3 / " (19 mm) trusshead self-tapping screws (includes 1 extra)
4
Tools Required
Marker or pencil
Center punch
Hammer
Electric drill
Drill, Tap and Screw Method:
1 – slotted screwdriver
1 – 10-32 tap and handle
1 – 5 / " (4 mm) drill bit
32
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.
1 – 13 / " (5 mm) drill bit
64
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:
31'7" to 32' 9.47 - 9.61 m
32'1" to 32'6" 9.62 - 9.76 m
32'7" to 33' 9.77 - 9.91 m
33'1" to 33'6" 9.92 - 10.06 m
33'7" to 34' 10.07 - 10.21 m
34'1" to 34'6" 10.22 - 10.36 m
34'7" to 35' 10.37 - 10.51 m
35'1" to 35'6" 10.52 - 10.66 m
35'7" to 36' 10.67 - 10.81 m
36'1" to 36'6" 10.82 - 10.96 m
36'7" to 37' 10.97 - 11.11 m
5 / " (8 mm) line with eye splice
16
3 / " (10 mm) truss head machine screws (includes 3 extra)
8
" (32 mm) self-tapping screws (includes 1 extra)
4
3 / " (19 mm) trusshead machine screws (includes 1 extra)
4
5 /
32
Phillips/slotted screwdriver
Tape measure (long enough to measure luff length)
Pliers or vice grips
The tang location
measured from the
top of boom is:
22'6"
22'9"
23'1"
23'5"
23'10"
24'2"
24'6"
24'10"
25'2"
25'7"
25'11"
" (4 mm) drill bit
Chart A
If the mainsail luff length or
"P" dimension measures:
6.85 m 37'1" to 37'6"
6.93 m 37'7" to 38'
7.03 m 38'1" to 38'6"
7.13 m 38'7" to 39'
7.26 m
39'1" to 39'6"
40'1" to 40'6"
7.36 m
7.46 m 40'1" to 40'6"
7.56 m 40'7" to 41'
7.66 m 41'1" to 41'6"
7.79 m 41'7" to 42'
7.89 m —
2
The tang location
measured from the
top of boom is:
11.12 - 11.26 m 26'3"
11.27 - 11.41 m 26'7"
11.42 - 11.56 m 26'11"
11.57 - 11.71 m 27'4"
11.72 - 11.86 m
27'8"
11.87 - 12.01 m 28'
12.02 - 12.16 m 28'4"
12.17 - 12.31 m 28'8"
12.32 - 12.46 m 29'1"
12.47 - 12.60 m 29'5"
—
8.00 m
8.10 m
8.20 m
8.33 m
8.43 m
8.53 m
8.63 m
8.73 m
8.86 m
8.96 m
— —