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Installing cheek block, Mounting adjusting cleat, Installing dead end eyestrap – Harken 252 Lazy Jack kit User Manual

Page 5

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Installing Cheek Block

Hold cheek block on the side of the boom so aft end of block is even with forward

mark. Use cheek block as a template to mark holes and use center punch to start

holes. Use screw method. Use

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8

" (16 mm) long trusshead or self-tapping screws.

Do not drill rivet holes.
DRILL HOLES: Machine Screws

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8

" (3.2 mm) and #8-32 Tap; Self-Tapping Screws

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64

" (3.5 mm).

Note: Position cheek block so sheave side of block is towards cleat. Refer to the two

diagrams on page 6. In most cases cleat will be mounted forward of cheek block near

forward end of boom. If there is other hardware in the way mount cleat aft of block.

Screw block to boom.

Mounting Adjusting Cleat

Mount cleat near forward end of boom so Lazy Jacks may be easily adjusted. Before

mounting cleat, swing boom out as far forward as it will go to make sure cleat does

not hit mast. If you have a single line reefing or other obstruction forward of block,

mount cleat aft of block as pictured on page 6. Use cleat as a template to mark holes

and use center punch. Do not drill holes for rivets!
Drill size for screws -

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" (3.5 mm) Use supplied flat head self-tapping sheet

metal screws.
Note: If you have internal boom control lines, cut off the ends of the self tapping

screws and round off tip to avoid snagging internal lines. First drive screws into

boom to cut threads.

Installing Dead End Eyestrap

Use the eyestrap as a template to mark holes and start holes using a center punch.
DRILL HOLES: Screws

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32

" (4 mm) and Tap #10-32 Rivets

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64

" (5 mm)

Important: Put eyestrap through line eye splice before fastening to mast. Use

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8

" (10 mm) long screws or rivet eyestrap and line to boom.

Top View - Fittings Mounted to Side of Boom

Sheave Side of Block is Towards Cleat

Measurement from Chart B

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