Selden Furlex 204S & 304S — Owner's Manual

Main Dimensions

Basic pack: drum unit, halyard swivel, furling rope, bearing halves, top guard, sail feeder. Extended pack adds halyard leads, stanchion blocks, pre-feeder pack and Torx bit set. Foil pack and wire/eye pack (swaged stud/eye, or Sta-Lok eye with or without rigging screw) complete the system; rod stays come from the rod manufacturer.

Sail information

• Max. luff length = FL – (F + E). Use webbing loops at head and tack; a luff tape compatible with the Furlex extrusion is required.
• Halyard-to-forestay angle 10–15°, never less than 10°; at least 50 mm (1 31/32") between halyard swivel and top guard. Sail too short: HMPE or wire pendant fixed to the head.

Wire Length & Top Extrusion Calculation

WL = FL – T – H (H = any extra links or toggles). For a swaged-stud stay, WL is the finished length eye to end of stud, not a cutting length.

• N = (WL – (A+B)) / 2400, rounded down; C = N × 2400; top extrusion D = WL – (A+B) – C; top distance tube E = D – X, with X = 200 mm (7 7/8") for 204S and 250 mm (9 27/32") for 304S.
• Example (204S Ø8, rigging screw 50% extended): FL 16.243 – 175 = WL 16.068; (16068 – 1270) / 2400 = 6.16 → N = 6; C = 14400; D = 398; E = 198.
• If D is less than 400 mm: N new = N – 1, C new = N new × 2400 + 2000, D new = D + 400, E new = E + 400 (example: 14000 / 798 / 598). The manual's note gives the limit as 700 mm (27 1/2") while the table footnote says 400 mm (as printed). If D exceeds 2000 mm, cut the top from a 2400 mm extrusion.
• Foil: 1000 mm (39 3/8") bottom extrusion, 2400 mm extrusions and a 2000 mm top extrusion. The luff is assembled on the stay from the top down; distance-tube hinge sideways; push each distance tube in about half a joining sleeve; short distance tube in about 50 mm (1 31/32) at the bottom for the bearing plug halves.
• Rod stays (597-180-E): feed everything from the top, starting with the lower short extrusion, long joining sleeve (204: 260 mm / 304: 325 mm); push the top distance tube 100 mm into the extrusion; secure the bearing halves with the spring pin and lock the upper eye grub screw with adhesive.
• 304S Ø12 (597-626-E): stud stay only; the joining sleeves must be threaded on before the stud is swaged (black 325 mm sleeve lowest, then one 250 mm sleeve per full-length extrusion). Check WL before swaging.

Inspection, Service & Hub Replacement

• Yearly: check the foil and sail grooves, that everything turns freely and that bearings are greased. Remove the brims and grease all four ball bearings in the lower unit (upper and lower main bearings, tack ring bearings); bring the swivel down to the sail feeder and grease both its bearings.
• Wash with fresh water and mild detergent and rinse well; silicone-free polish or wax on the extrusions; protect black plastic when polishing stainless.
• Store with the mast, aluminium away from steel, never wrapped damp in plastic; in frost areas store dry or with centre extrusions raised. Drum unit and halyard swivel slide off for storage.
• Never dismantle the halyard swivel or drum unit (loose balls). Re-making a Sta-Lok: heat the threads to free the adhesive, keep at least 10 mm (25/64") of free wire above the socket, cut strands about 5 mm (13/64") and always use a new wedge.
• Line-drum hub replacement (597-916-E), service kits 549-203-10R (204S), 549-303-10R (304S): remove the 2-turn retaining ring, shim, washer, balls and bearing ring; lift the drum off by the tack ring without lifting the tack-ring assembly; fit the new halves with the join on notch A, four self-tapping screws, then grease the balls and fit a new retaining ring. Kit contents: 2 drum halves, 4 + 2 self-tapping screws, retaining ring, 5 balls, 5 bearing rollers.

Troubleshooting

Spares & Accessories

Numbers 13–16 are not used in the printed list.

Wire, Eye Fitting & Luff Extrusion Packs

Toggles & links