Stringing the control lines, Determining the location of boom hardware – Harken 253 Lazy Jack kit User Manual
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Stringing the Control Lines
Decide whether the adjusting block and cleat
will be on port or starboard. The end of the line
without the eye splice will be on the side of the
boom where you will adjust the Lazy Jacks –
the side where you will install the cleat.
With the middle of the control line draped
under the boom, pass the ends of the line
up and run each end of the line through
the blocks that are suspended from
the wire. Run line through the
blocks from stern to bow as
shown in the diagram below.
Eye Splice
This will be adjusting side
*Note: You may want to check sail containment before drilling holes in the boom.
To do this, put sail on, tape the boom hardware in place, reeve lines through system
and lower sail. Move if necessary.
Determining the Location of Boom Hardware
Measure the mainsail foot length or find the E dimension of the mast. Find
this measurement in the left column below and circle the corresponding
numbers in the right column. Put a mark on each side of the boom at
each measurement. See drawing, page 5.
9'11" (3.023 m)
4.67 - 4.81 m
3'6" (1.067 m)
15'7" to 16'
9'8" (2.946 m)
4.52 - 4.66 m
3'4" (1.016 m)
15'1" to 15'6"
9'4" (2.845 m)
4.37 - 4.51 m
3'3" (991 mm)
14'7" to 15'
9' -(2.743 m)
4.22 - 4.36 m
3'2" (965 mm)
14'1" to 14'6"
8'8" (2.642 m)
4.07 - 4.21 m
3' -(914 mm)
13'7" to 14'
8'4" (2.540 m)
3.92 - 4.06 m
2'11" (889 mm)
13'1" to 13'6"
8'1" (2.464 m)
3.77 - 3.91 m
2'10" (864 mm)
12'7" to 13'
7'9" (2.362 m)
3.62 - 3.76 m
2'8" (813 mm)
12'1" to 12'6"
7'5" (2.261 m)
3.47 - 3.61 m
2'7" (787 mm)
11'7" to 12'
7'1" (2.159 m)
3.32 - 3.46 m
2'6" (762 mm)
11'1" to 11'6"
6'10" (2.083 m)
3.17 - 3.31 m
2'4" (711 mm)
10'7" to 11'
6'6" (1.981 m)
3.02 - 3.16 m
2'3" (686 mm)
10'1" to 10'6"
6'2" (1.880 m)
2.87 - 3.01 m
2'2" (660 mm)
9'7" to 10'
5'10" (1.778 m)
2.72 - 2.86 m
2'1" (635 mm)
9'1" to 9'6"
Boom Cradle
Strap Location
5'6" (1.676 m)
“E” Dimension or Sail Foot Length
2.57 - 2.71 m
Cheek Block and
Deadend Location
1'11" (584 mm)
8'7" to 9'
Chart B – Location of Boom Hardware*