J/70 Owner Guide
Page
© Copyright 2012, J Boats, Inc. All Rights Reserved
14
to the foredeck mounted padeyes and running through the stanchions aft where the Hi-‐load thimble is
slipped into the end splice and lashed to the stern rail. The average breaking strength of D-‐12 SK78 used
by Marlow for these safety lines is 2400 kg (5,290 lbs). A stern cockpit safety line is also provided with a
small SS pelican hook for easy removal.
A few facts from the Marlow website regarding Dyneema:
•
High Strength: On a weight for weight basis, Dyneema® is 15 times stronger than steel wire
•
Light Weight: Strength for strength, Dyneema® is 8 times lighter than steel wire. Dyneema® also
has a Specific Gravity of 0.97 which means it floats in water
•
Water resistant: Dyneema® is hydrophobic and does not absorb water, meaning it remains light
when working in wet conditions and is therefore also more durable
•
Chemical resistance: Dyneema® is chemically inert, and performs well in dry, wet, salty and
humid conditions, as well as other situations where chemicals are present.
•
UV Resistant: Dyneema® has very good resistance to photo degradation, maintaining its
performance when exposed to UV light
Cockpit Safety Line Installation
•
Remove the thimble from the eye splice on the long section. This is the aft end of the safety line.
•
Thread the forward end eye splice through the padeye on the foredeck, and then thread the aft
end eye splice through the forward one. Pull tight to “luggage tag” the safety line to the padeye.
•
Thread the aft end eye splice through both stanchions and the lifeline pad(s) and reinsert the
thimble – it will be somewhat loose.
•
Take the lashing (the shorter, thinner piece with the eye splice in one end) and “luggage tag” it
through the bale on the stern pushpit.
•
Pass the lashing through the thimble in the aft end of the safety line and then back through the
bale on the pushpit, pulling aft on the safety line to maintain tension.
•
Make 3 or 4 passes, keeping the direction constant and maintaining tension.
•
After exiting the pushpit bale on the last pass, make several half-‐hitches onto the bundle of
lashing passes between the pushpit and the thimble.
•
Tape the last couple of inches of tail to the bundle for a finished appearance (black electrical tape
works very well).
Your safety lines and lashings should be checked for wear as part of a regular boat maintenance program.
Potential chafe areas are stanchion pass-‐throughs and the aft section where the spinnaker sheet
transitions from “inside” to “outside”. Also remember to rinse the safety lines whenever you rinse your
boat and deck hardware, as sharp salt crystals deposited when sea water dries can be a source of chafe.
According to Marlow Ropes, properly installed and cared for J/70 safety lines should easily offer 5 or
more seasons of service.
Running Rigging
J/70 includes a refined package of running rigging developed with Marlow Ropes to match the
requirements of the J/70. The package includes each line in labeled bags with an inventory list included
in the sealed Marlow box. This box is not opened until the boat is delivered to the dealer or customer. A
complete inventory of this rigging is also listed within this manual, and available directly from Marlow.
To properly rig each system please refer to the rigging diagrams printed in this manual.
