The On Deck Channelvideo
Installing New Line Using the OLD Line | How the Pros Do It
February 8, 2026 · 15 min · 4K views · St. Petersburg
What this video covers
Replacing a sailboat halyard requires stitching the new line to the old one to ensure a smooth transition through the mast sheave box.4:54 A professional rigger demonstrates the technique by using a needle and twine to create a secure, low-profile connection between the two lines.7:25 The process involves passing the twine through both ends multiple times to create a quadruple loop, followed by lock stitches to prevent the lines from separating under tension.8:29 This method avoids the increased diameter caused by taping a messenger line alongside the halyard, which often leads to jamming inside the mast.6:49 Before pulling the new line, the rigger emphasizes flaking the new halyard on deck to prevent tangles during the hoist.5:38 When replacing lines through a clutch, a stiff straw can serve as a makeshift guide to feed the line through the mechanism.13:55 Proper stitching and careful preparation prevent the new line from breaking free inside the mast, which would otherwise require professional intervention to retrieve.
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