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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  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). 

 

Summary of Contents for Yachts SC 420

Page 1: ...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...

Page 2: ...re below shows so the rope hangs below the pole when being used Bow Attachments Have the bow attachments shackled as shown Then tie on the false forestay elastic and the jib tack rope then tie the jib...

Page 3: ...s is the 5 th pin hole position Mark the spreaders every two cm s from the centre of the shroud wire this can be used for the jib trim with regard to the leech settings Trapeze System The trapeze rope...

Page 4: ...assemble them as required Fitting Bag In the fitting bag are all the fittings that are not fixed on the yacht or loose with a system that must be put on after you receive the boat We have also provid...

Page 5: ...picture to get a good understanding of the mast end of the vang system Spinnaker Sheets and Spinnaker Knots The spinnaker sheet rope is a special type of 6mm rope This enables you to use it in a 6mm f...

Page 6: ...ng guide as 1 chocks these can be used to chock the mast and lock it into place fore and aft whilst sailing This clearly has a big advantage on other systems and as the mast can be chocked forward in...

Page 7: ...washers on the inside of the bolt to prevent water coming into the hull from the case whilst sailing Sponge and Bailer A sponge and bailer is provided as shown in the picture below this can be useful...

Page 8: ...g snap hook onto the top of the vang system which connects onto the boom Another one should be used for the main halyard and the last one is to connect the rig tension strop to the Harken triple block...

Page 9: ...o wing nuts on each side and also a plastic pin for locking the rudder down The bolt goes in the top locating hole and the plastic pin goes in the lower hole Covers The boat comes with a bottom cover...

Page 10: ...cture For sail tuning information see tuning guide Tuning See tuning guide We hope this Instruction Manual was helpful to assemble and put together your S C 420 Yacht We also trust you will be very sa...

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