b"Small Boat FurlingDeck Spherical jointComponents: UnderdeckUnderdeck FurlersSmall Boat underdeck furling units are ideal for sportboats and daysailers from 4.8 - 9 m (16 - 30'). The drum is located beneath the deck, lowering the tack height for maximized sail area. The single through-deck ball joint provides a low-profile, nearly watertight system that aligns the spool to the headstay. Like all Small Boat furlers, the underdeck furler is for furling only, not reefing. StationaryBelowdeckAn optional hoistable ball bearing halyard swivel can be installed onbracketthe headstay so the sail can be raised or lowered without removing479 Spool pivots to align with load.the headstay. See page 160.480Tack Adapter Tangs 481Stainless steel tack adapter tangs are used to adapt clevis pin489diameters on headstays to the standard clevis pin size that comes on the Harken unit. A third hole accepts lashing to adjust jib luff tension. TACK ADAPTER TANGSTurnbuckle eye on stationary bracket attaches to an underdeck chainplate.478477493UNDERDECK FURLERSComponents (if ordering separately)UpperHoistableWeightswivelswivelDrum Upper swivel Hoistable swivel Drum Fits Part No. Part No. Part No. oz g oz g oz g furler164 464 477L 2.6 74 2.9 82 24 680 477 Fairlead feeds line onto the spool.207 465 493L 9.2 261 8.9 252 42.6 1201 493478U 482 478L 15 431 16.8 477 81 2296 478FurlersPin-to-pin Drum LineJaw Max luff Clevis pin Maximum Part lengthMin Max width wire Weight working loadNo. Description in mm in mm in mm in mm in mm in mm in mm oz g lb kg477Underdeck furler/small*6 1/81563 1/8791/835/3245/1681/831/46.423.3661950431493Underdeck furler/medium*7 3/818841025/3243/163/8103/1655/167.950.514332000907 5 478Underdeck furler/large*10 7/3226051273/1651/461/2121/467/1611.196272130001361*Includes drum and upper swivel. Does not include hoistable swivel.Tack Adapter Tangs Tang-hole to tang-holeUpper pin Lowerpin Max luff Clevis pin MaximumPart length wire Weight working loadNo. Description in mm in mm in mm in mm in mm oz g lb kg Fits furler 4794 mm tack adapter tang1 1/2385/1687/16115/3245/167.95.2147300013614784805 mm tack adapter tang1 1/2383/8107/16113/1653/89.55.2147300013614784816 mm tack adapter tang1 1/2387/16117/16111/467/1611.15.2147300013614784898 mm tack adapter tang355/1685/1685/32 5/167.93.2912000907493 1 3/84 159"