Selden Gearbox Replacement Kit for Backstay/Halyard Tensioner

The Selden Gearbox Replacement Kit for Backstay/Halyard Tensioner is a genuine service part set manufactured to maintain and refurbish Selden mechanical tensioners used in rigging systems. These tensioners allow fine adjustment of backstay or halyard tension using a winch handle-operated gearbox — critical for mast bend control and sail shape tuning. Over time, internal gear halves can wear; this replacement kit restores correct engagement and ensures smooth tensioning action.

The kit includes two precisely machined gearbox halves matched to the original tensioner design. Replacing worn gearbox components helps maintain consistent load control, reduces backlash, and extends the service life of your mechanical tensioner. Suitable for both backstay and halyard tensioner models where original Selden service parts are specified.

Key Features

• Precision gearbox halves for mechanical tensioners

• Designed for Selden backstay and halyard tensioner systems

• Restores smooth, reliable tensioning function

• Marine-grade materials for durability under load

• Ideal for scheduled service and refurbishment

Application

Used by professional riggers and experienced sailors to maintain or refurbish mechanical tensioners that control standing rigging tension on cruising and racing sailboats.