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Yachts SC 420
Instruction Manual

S/C Yachts Yachts SC 420 Instruction Manual

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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 Yachts SC 420

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 ...
Page 3
Mast base the mast step bolt should be in the 6 th hole from the back. The rig tension bolt should be in the 3 rd 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 th pin hole position. Mark the spreaders every...
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 require...
Page 5
Vang have the rope strops and vang blocks attached as shown above to the mast collar. The other end should be attached as the below illustration shows. There are 3 vang ropes in the rope bag, a 2.5m which is used from through the cleat and hull at each end and has a single harken sheave on it. The 2...
Page 6
Plastic rope balls these two rope balls should be used on the pole downhaul system in front of the knot (see picture under mast base) and also on the spinnaker halyard before the knot (see picture below). The balls will be found in the fitting bag. Pole hook the picture above shows how to tie on the...
Page 7
Centreboard fastening the centerboard comes with an alloy blue bush, this should be positioned in the cb pivot hole prior to inserting into the case. Insert the centerboard into case and then use the centre board bolt and washers to locate and bolt the foil through the centre case. You should use th...
Page 8
Wind indicator we have provided a complimentary high performance new zealand made wind indicator, this comes in it ’s own box and has instruction manuals of how to assemble. The wind indicator should be fastened to the top of the rig via duck tape or by drilling a hole through the top of the mast ju...
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...
Page 10
Sails one main, jib and spinnaker are supplied inside the boat and will be ready to sail including numbers and country code if known at the time of manufacture. For sail tuning information see tuning guide. Tuning see tuning guide. We hope this instruction manual was helpful to assemble and put toge...