Harken 430 Single Line Reefing - Manual (Page 6)

A. If there is a mast collar, remove the eyestrap and
shackle the block to the collar. Alternatively, install the
block with eyestrap to the deck.
Position the eyestrap on the deck below the bullseye.
Align the legs of the eyestrap so they are in line with
the line direction to the deflector block or deck orga-
nizer. Consider the location of the back-up nuts below
deck when planning the block’s location of the mast
base block. See tip below.
Drill holes and apply a high quality marine sealant to
the holes. See tip below. Install the block assembly. Use
a back-up plate or large diameter washers inside the
cabin top to back up the hardware.
Drill size - 13/64” (5mm)
Mounting Hardware
2 10-32 X 1
1 /
2
” Roundhead screws
2 Washers
2 Lockwashers
2 10-32 Nuts
Marine Sealant – Use to seal holes - See tip below.
6
Step 6 Installing Deck Hardware
General Instructions Detailed Instructions
A. Mount mast base block directly below the bullseye
and position so block is angled towards the deflector
block or deck organizer.
Installation Tip – Beveling Top Edge of Hole
After drilling through deck, slightly round off the top edge of the
holes with a small knife. This way, when the sealant is applied, it
will mass around the screw providing a good durable water seal.
B. The deflector block is used to turn the reefing line so
it does not interfere with the companionway hatch or
other obstructions on the cabin top:
1) Place so line runs in straight fore/aft direction to cleat.
2) Keep block aft and inboard to reduce load.
3) Check for suitable position for back-up nut and washers.
4) Rotate so it bisects line angle.
Drill holes, apply marine sealant and install using:
Drill size - 13 /
64
” (5mm)
Mounting Hardware
2
10-32 X 1 1 /
2
” Roundhead screws
2 Washers
2 Lockwashers
2 10-32 Nuts
Marine sealant – Use to seal holes.
C. You will need to supply a cleat or line stopper for
the Single Line Reefing system and hardware to mount
it. Mount the cleat in a convenient spot within easy
reach of the cockpit, near the main halyard cleat if pos-
sible. Make sure the cleat or line stopper is through-
bolted and has a suitable back-up plate or washers.
C. Install cleat or line stopper at a convenient spot on
the cabin top near the main halyard cleat.
B. Install deflector block so line runs in fore/aft direction
to cleat.
Deck
Before After
Beveling Top Edge of Hole
Mount so it bisects
line angle and is aft
and inboard to reduce
load on block.
Keep
block aft
Mast base
block
Mast
Installation Tip – Planning Location of Deck Hardware
It is important to plan the location of all deck hardware before
mounting the mastbase block, deflector block and cleat. The
position of one block depends on the location of the other block
or cleat. In addition, you must consider the location and
accessibility of back up hardware inside the cabin top.