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420 Instruction Manual – 2008 Edition
Introduction
The boat comes with all gear ready to sail, however there is a certain amount of assembly which we hope we can
cover in this instruction manual and through the tuning guide, that will make it much quicker to assemble and get your
S|C 420 on the water ready for sailing or racing.
All the parts come in the boats except the masts, which will be located in the container together. So after you find the
mast you must then open up your boat and assemble in any order that suits your requirements. In the below
information and also with the assistance of the tuning guide, you should be able to correctly set up each specific part
of the boat.
Mast
The mast comes with the adjustable spreaders and you will need to bolt these on (nuts and bolts provided), also put
the shroud in the spreader end using a screwdriver (position the shroud wire behind the bolt). Fasten the shroud and
the trapeze lines in with the T terminals before attaching the shroud to the spreader end. You will also need to feed
the ropes into the mast via the mouse line supplied, the best way to do this is to tape the two ropes together securely
prior to pulling the new line through. The spreader adjusters work very well and 1 full turn is equal to 5mm of pre bend.
To set these up originally I recommend pulling on a reasonable amount of tension, then step back 15 metres + and
line up the shroud wire just above the shroud adjuster and then compare the shroud/spreader position. Make these
even first before attempting to tune the rig, also I advise having more bend than required originally and then reducing
it once you are close to the tuning numbers on the rig tension and mast rake.
Rigging Pack
Below is a picture of the rigging pack supplied by Seldon. You will find in it the Topper and Topper Hook, the Main
Halyard, the Spinnaker Halyard, the Trapeze Wires, the Forestay and Forestay Halyard, the Shrouds, the Rig Tension
Strop, the False Forestay and lastly the Inner Forestay (to this the Forestay Spinner, is required to be added by
putting on above the swage and inserting the bolt, so it can't come back off).
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Summary of Contents for S/C Yachts Yachts SC 420
- Page 1 Introduction The boat comes with all gear ready to sail, however there is a certain amount of assembly which we hope we can cover in this instruction manual and through the tuning guide, that will make it much quicker to assemble and get your S|C 420 on the water ready for sailing or racing.
- Page 2 Boom One boom is supplied as shown below, all gear should be on or in the boom. Set the vang slide to 625mm to the centre of the slide from the back of the mast track. Set the front main sheet slide to 1385mm to the centre of the slide from the back of the mast track, also have the second mainsheet slide set just behind the first one at the 1385mm point.
- Page 3 Mast Base The mast step bolt should be in the 6 hole from the back. The rig tension bolt should be in the 3 hole from the back. Spreader Length and Marks The spreader length should be 505mm from side of mast to centre of shroud wire, this is the 5 pin hole position.
- Page 4 Rope Bag In the rope bag is a list of all the ropes on the boat. This list shows which ropes are already on the boat and also which ropes come in the bag. Also listed is the size and length of each rope. All the ropes in the bag come with a label attached, so you can quickly assemble them as required.
- Page 5 A stopper knot is okay for this. You can also loop it through itself if it is easier and if you prefer to change these on the water with more ease.
- Page 6 This equates to higher speeds and better angles to be sailed across reaches, with less overpowering of the boat. Centre Case Systems Below is a picture of the centre case systems and traveler bar.
- Page 7 You can store them in the spinnaker bags and you may wish to have the bailer tied into the boat. Tension Gauge We have provided a complimentary Loo’s Spring Gauge as below with the boat. We use this on the shroud when rigging and tuning the boat.
- Page 8 Shackles In each boat in the fitting bag are the shackles used to assemble the boat. There are 5 big shackles, 2 small long D shackles and 3 small screw shackles. Use one of the big shackles on the forestay at the fork end, one for the vang attachment onto the vang mast strap and one for connecting the vang snap hook onto the top of the vang system, which connects onto the boom.
- Page 9 Rudder Stock One rudder stock is supplied with the boat and can be taken on and off the boat by removing the top safety pin through the gudgeon pintle. The rudder stock also comes with a tiller extension that can be added or removed easily by snapping together the two parts at the base of the tiller extension universal joint.
- Page 10 We hope this Instruction Manual was helpful to assemble and put together your S|C 420 Yacht. We also trust you will be very satisfied with the quality and design of your new boat which we hope brings you a lot of success on the race course.
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