Lewmar Winches

Managing running rigging demands precise mechanics. A winch is not just a line redirect - it is a force multiplier that must perform under constant exposure to salt. The choice between a self-tailing model and a standard one depends on your sailing habits and the number of hands in the crew. When evaluating an upgrade or replacement, remember that the winch base must sit perfectly flat on the gelcoat to prevent structural cracking caused by stud tension.

The condition of internal components, including pawls and springs, determines how long a winch lasts. Even the best aluminum or chrome-bronze winch can seize up if it is not cleaned regularly. At Nautiba our technical approach focuses on verifying dimensional compatibility: mounting hole spacing, height, and footprint are all parameters we work through with you to avoid installation errors that would require invasive deck work.

If you are switching to an electric system, the evaluation goes beyond pulling force to the electrical load on the battery bank. An electric winch requires properly sized cabling and correct circuit breaker protection to prevent overloads. We always recommend checking the current draw at maximum load, which is a critical parameter for keeping your onboard electronics intact.

For installation, deck geometry is your first constraint. If the mounting area has curves, a compensation base is needed to ensure the load is distributed correctly across the fiberglass.

Selection and installation criteria

• Check the safe working load (SWL) against your sail area, not just boat length.
• Make sure the sheet entry angle onto the drum is consistent with the manufacturer's specs to prevent slippage.
• Use winch-specific grease, applying a minimal amount to the pawls to prevent cold or dirt from seizing them.
• Confirm the studs are long enough to pass through the deck and secure a solid mechanical hold with backing plates below deck.

How do I choose the right winch size?

Sizing is based on the load demand from the sails. Consult the tables that cross-reference genoa or spinnaker sail area against winch power, and avoid undersizing the maximum allowable working load.

Can a manual winch be converted to electric?

Many Lewmar models offer conversion kits, but the technical feasibility depends on the space available below deck for the motor and on whether correctly sized electrical cables can be routed for the power draw involved.

How often should I service the winch?

Service intervals depend on use. On average, a full overhaul with disassembly and cleaning of the pawls should be done once a year, especially if the boat stays in the water year-round in a saltwater climate.

What happens if the winch slips under load?

Slippage usually indicates an excessive buildup of old grease, worn self-tailing jaws, or an incorrect line entry angle. Clean the mechanism and check that the line has not been hardened by salt crystallization.

How do I protect the winch when the boat is not in use?

A protective cover in technical fabric is the simplest and most effective way to prevent dust, salt, and UV rays from degrading the plastic parts and chrome finishes, extending the intervals between service sessions.